Xinjiang Aksu San Jiang Breeding Co., Ltd CDM Biogas Power Generation Project Environmental Impact Report
E2027
Public Disclosure Authorized
ENVIRONMENTAL IMPACT REPORT
Public Disclosure Authorized December 2007
Public Disclosure Authorized
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Public Disclosure Authorized
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Content
Foreword...... 7
1General Provisions ...... 9
1.1Preparation basis...... 9
1.2 Evaluation Principle and Preparation Purpose ...... 11
1.3 Evaluation key point and evaluation class ...... 12
1.4 Evaluation range and standard...... 15
1.5 Environmental protection target ...... 18
2. General Situation of Regional Environment ...... 19
2.1 General situation of natural environment...... 19
2.2 General situation of social and economic environment...... 21
3 Analysis of the Project...... 25
3.1 General situations of the project ...... 25
3.2 Analysis of process flow ...... 28
4. Environmental present situation investigation and analysis ...... 39
4.1 Environmental present situation investigation ...... 39
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4.2 Air environment present situation investigation and evaluation ...... 41
4.3 Investigation and evaluation of present situation of water environment ...... 44
4.4 Investigation and evaluation of present situation of sound environment ...... 45
4.5 Investigation and evaluation of present situations of soil and vegetation environment ...... 46
5 Environmental impact forecast and evaluation ...... 49
5.1 Air environmental impact forecast and evaluation ...... 49
5.2 Forecast and evaluation of impact on water environment ...... 64
5.3 Analysis of impact on sound environment...... 69
5.4 Analysis of solid waste influence ...... 72
5.5 Brief analysis of environmental impact during construction period ...... 72
5.5 environment influence analysis for alternative plan...... 76
6 Environmental risk evaluation...... 79
6.1 Environment risk identification and analysis...... 79
6.2 Forecast of range of accident influence on environment ...... 80
6.3 Emergency plan for accident...... 82
6.4 Prevention countermeasures and suggestions ...... 83
7 Clean production ...... 87
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7.1 Clean production evaluation index system ...... 88
7.2 Clean production index classification...... 89
7.3 Quantitative index classification ...... 89
7.4 Clean production index analysis...... 89
7.5 Clean production improvement suggestions ...... 89
8 Environmental protection measures...... 91
8.1 Measures on environmental protection during construction period ...... 91
8.2 Atmospheric pollution prevention countermeasures and measures...... 93
8.3 Water pollution prevention countermeasures and measures ...... 94
8.4 Noise pollution prevention countermeasures and measures ...... 94
8.5 Solid waste pollution prevention countermeasures and measures...... 95
9. Total control...... 97
9.1 Selection of total control factor ...... 97
9.2 Calculation of pollutant discharge total control ...... 97
9.3 Suggestive index for pollutant emission total control of the planned project...... 97
10. Public participation...... 98
10.1 Purpose of public participation...... 98
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10.2 Environmental information disclosure mode and contents...... 98
10.3 Investigation results ...... 101
10.4 Conclusion of public participation investigation...... 105
11 Environmental protection investment and analysis of environmental and economic gains and losses...... 106
11.1Environmental protection investment ...... 106
11.2 Analysis of environment and economic gain and loss ...... 108
12 Environmental management and environmental monitoring plan ...... 109
12.1 Environmental management...... 110
12.2 Environmental monitoring ...... 114
12.3 Training plan and estimation of expenses ...... 117
13 Evaluation conclusion and suggestions...... 118
13.1 General situation of project...... 118
13.2 Influence on environmental air...... 118
13.3Water environmental impact...... 119
13.4 Sound environmental impact...... 119
13.5 Environmental risk...... 119
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13.6 Total control...... 120
13.7 Public participation...... 120
13.8 General evaluation conclusion and suggestions ...... 120
13.9 Suggestions...... 121
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Foreword Xinjiang Aksu San Jiang Breeding Co., Ltd hereinafter referred to as San Jiang Company , located at Aksu City, Xinjiang is the largest live pig breeding base of the five provinces in Northwestern China. Currently the company boasts live pig on hand of 70630 heads has pig farm feces and wastewater discharged out from the farm after simple treatment, making obvious influence on local environment. With development of animal husbandry intensive breeding animal and poultry feces pollution issue will become increasingly striking and more and more importance has been attached to decontaminated, resources-oriented and ecological treatment of animal and poultry feces, reduction of pollution to environment and improving virtuous circle of agricultural production by governments at various levels. Xinjiang Aksu Party Committee and People’s Government have placed intensive breeding farm’s pollution treatment and industrialized biogas power generation work on their top agenda, and mapped out relevant matching policy. The World Bank is preparing an carbon fund project for San Jiang Company designed to reduce San Jiang Company’s greenhouse gases emission at present change existing open anaerobic pond treatment mode into med-temperature closed anaerobic digestion system to collect biogas and use the biogas for power generation. Considering the above-mentioned factors San Jiang Company plans to utilize feces and wastewater from live pig in stock to generate biogas and to generate power with the biogas by making investment to construct CDM biogas power generation project. Biogas will be used for the company’s industrialized biogas power generation and production domestic energy. Biogas residue, after drying and shatter, can be used as organic solid fertilizer and feed additive biogas slurry can be transmitted to neighboring fruits and vegetable fields through pipeline for sprinkling irrigation, infiltration irrigation and drip irrigation. The entire project is “ an ecological and environmental protection project to change waste into valuable things for comprehensive utilization of resources” being of great driving and demonstration significance for development of animal and poultry in West China and fueling organic agro-industry development and being to make certain contributions to controlling greenhouse gases emission, protecting earth climate conditions and improving the company’s environment.
6XUYH\LQJÃ3ODQQLQJÃDQGÃ'HLVJQLQJÃ5HVHDUFKÃ,QVWLWXWHÃRIÃ;LQMLDQJÃ3URGXFWLRQÃÉÃ&RQVWUXFWLRQÃ&RUSVÃ -7-Ã Xinjiang Aksu San Jiang Breeding Co., Ltd CDM Biogas Power Generation Project Environmental Impact Report According to relevant stipulations of Law of the People’s Republic of China on Environmental Impact Evaluation, Regulations on Environmental Protection Management of Construction Project and Construction Project Environmental Protection Classified Management Contents this project needs environmental impact evaluation to be carried out and report to be prepared. In Oct. 2007 our center, as entrusted by Aksu San Jiang breeding Co., Lt carried out environmental impact evaluation of the project. To properly implement the environmental impact evaluation it is first needed to have a complete understanding of project construction contents and environmental conditions in project area. So we made a detailed list for survey after accepting the task. At the same time, our project group made tailored and representative on-the-spot survey and investigation of the area for the project. After serious analysis and study of the production process and environmental impact factors, etc according to requirements of environmental impact evaluation technical guidelines we made analysis and evaluation of influence on environment by the project construction put forward corresponding environmental protection countermeasures and measures entrusted Aksu Prefecture Environmental Monitoring Station with present situation monitoring prepared and completed environmental impact report of the project. Now we submit the environmental impact report to relevant competent administrations of environmental protection as basis for examination and approval of the construction project and for decision-making of environmental management during operation.
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1General Provisions 1.1Preparation basis 1.1.1 Laws and regulations basis 1 Law of the People’s Republic of China on Environmental Protection Dec.
26, 1989 2 Law of the People’s Republic of China on Environmental Impact
Evaluation Oct. 28, 2002 3 Law of the People’s Republic of China on Control of Atmospheric Pollution April 29, 2000
4 Law of the People’s Republic of China on Control of Water Pollution May
15, 1996 5 Law of the People’s Republic of China on Control of Environmental Noise
Pollution March 1, 1997 6 Law of the People’s Republic of China on Control of Solid Waste Pollution to
Environment April 4, 2005
7 Law of the People’s Republic of China on Promotion of Clean
Production June 29, 2003 8 Law of the People’s Republic of China on Land Administration Jan. 1,
1999 9 Law of the People’s Republic of China on Water and Soil Conservation
June 29, 1991 10 Law of the People’s Republic of China on Energy Saving Jan. 1, 1998 11 Notice of Releasing Opinion on Enhancing Industrial Water-saving Work GJMZY 2000 No.1015 12 Regulations on Construction Project Environmental Protection
Management, the State Council Circular No. 253 Nov. 29, 1998
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13 Directory of Classified Administration of Construction Project
Environmental Protection, Circular No. 14 by the State Environmental Protection Administration Oct. 13, 2002 14 Xinjiang Uygur Autonomous Region’s Notice of Implementation Opinion on Carrying out Regulations on Construction Project Environmental Protection Management by the State Council, XZBF [2002] No.3 by People’s Government of Xinjiang Uygur Autonomous Region Jan. 2002 15 Directory of Industrial Structure Adjustment Version 2005 , Circular No.40 by State Development and Reform Commission 16 Decision on Implementation of Scientific Outlook of Development to
Enhance Environmental Protection by the State Council Dec. 2005
17 Interim Measures on Public Participation in Environmental Impact
Evaluation HF 2006 No.28 . 1.1.2 Relevant technical specifications and technical guidelines 1 Outline of Technical Guidelines for Environmental Impact Evaluation,
Atmospheric Environment and Surface Water Environment by State Environmental
Protection Administration HJ/T2.1 2.3-93
2 Technical Guidelines for Environmental Impact Evaluation — Non-pollution
Ecological Influence HJ/T19-1997
3 Technical Guidelines for Environmental Impact Evaluation — Sound Environment by State Environmental Protection Administration HJ/T2.4-1995 4 Technical Guidelines for Construction Project Environmental Risk
Evaluation HJ/T169-2004 . 5 World Bank Operation Policy OP4.01 Environment Evaluation Policy 6 Pollution Prevention and Reduction Manual 1.1.3 Relevant technical documents 1 Feasibility Study Report for Xinjiang Aksu San Jiang Breeding Co., Ltd
CDM Biogas Power Generation Project
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2 Letter of Commission of Aksu San Jiang Breeding Co., Ltd for
Environmental Impact Evaluation of this Project. 1.2 Evaluation Principle and Preparation Purpose 1.2.1Evaluation principle 1 Sticking to the principle that environmental impact evaluation serves economic construction and environmental administration taking relevant national industry policy and environmental protection policy regulations as basis seriously implementing and executing requirements of “Circular Economy”, “Clean Production ”, “Overall Control ” and “Up-to-standard Emission”, etc. 2 Attaching importance to practicality of evaluation seriously demonstrating feasibility of environmental pollution control measures properly controlling pollution
prevention and treatment serving as a good adviser for environmental administration
so as to provide scientific basis for project selection and decision on environmental
administration. 3 With scientific, justice and objective principle to carry out evaluation work to guarantee quality of environmental impact evaluation.
4 On premise of meeting evaluation requirements to make best use of existing data so as to shorten evaluation cycle, save environmental impact evaluation expenses and meet requirements of project progress. 1.2.2 Preparation purpose Purpose of preparation of this environmental impact evaluation report is to evaluate reasonableness of project overall arrangement and construction of important facilities in view of environment analyze and argue environmental impact, range and extent arising from project construction and put forward environmental protection measures on reducing negative influence and environmental protection monitoring plan to provide environmental administration basis for the project’s reasonable development and operation.
According to project property in this environmental impact evaluation works will be started from aspects of water, gas, sound, ecological environment, risk and solid
6XUYH\LQJÃ3ODQQLQJÃDQGÃ'HLVJQLQJÃ5HVHDUFKÃ,QVWLWXWHÃRIÃ;LQMLDQJÃ3URGXFWLRQÃÉÃ&RQVWUXFWLRQÃ&RUSVÃ -11-Ã Xinjiang Aksu San Jiang Breeding Co., Ltd CDM Biogas Power Generation Project Environmental Impact Report waste. Evaluation will consists of two stages of project construction period and operation period with main evaluation works as follows 1 On the basis of characteristics of the construction project to carry on investigation of present situations of natural environment and social environment of construction project site and determine major environmental protection target and evaluation key point. 2 To carry out item analysis of the project. At the angle of environmental protection to make demonstration of reasonableness and feasibility from aspects of the construction project’s overall arrangement, planned construction contents, process flow and “three-waste” emission volume at different stages and corresponding treatment plan as well as “replacing the old with the new”, etc, and put forward requirements and suggestions on project construction. 3 To analyze and forecast project’s influences on project area and surrounding atmospheric environment, water environment and sound environment during construction period and operation period to determine influence range, extent, factors, ways, mode and time limit at the same time, to put forward corresponding environmental protection countermeasures in view of unfavorable influence to environment in different stages and carry out analysis of environmental and economic gains and losses.
4 Through analysis and forecast of influences of various environmental impact factors to clearly draw the conclusion of environmental impact of the project construction and formulate environmental protection management and monitoring plan, etc at the angle of environmental protection to explain feasibility of project development and construction so as to provide environmental administrations and relevant authorities with decision-making and management basis. 1.3 Evaluation key point and evaluation class 1.3.1Evaluation key point Considering production process and pollution characteristics through analysis of present situations of environment surrounding the project and various environmental
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Form 1-1 Atmospheric Pollutant Equivalent-standard Emission Unit m3/h
Place SO2 NO2 TSP Biogas burning 0.6×107 9.1×107 2×107
*Note standard for SO2 and nitrogen oxide in smoke emission takes SO2 one-hour average (0.50mg/m3) and TSP daily average 0.30mg/m3 in Environmental Air Quality Standard GB3095-1996 for calculation.
Form 1-2 Environmental Air Evaluation Classification Judgment Basis Topography Pi 2 . 5 × 1 0 9 2.5×109 Pi 2.5×108 Pi 2.5×108 Complicated 1 2 3 Plain 2 3 3
Preliminary calculation shows that in main pollution factors NO2 equivalent-
7 8 standard pollution load is the highest PNO2=9.1×10 <2.5×10 . As the project area belongs to plain topography, according to Guidelines for Environmental Impact Evaluation HJ/T2.2-93 atmospheric evaluation class is judged as Class III. 3 Water environment Discharge capacity from the project production is 609.3m3/d water quality complication extent is at complicated level and water is designed to be discharged to fruits forest after in-farm treatment. According to Technical Guidelines for
Environmental Impact Evaluation · Surface Water Environment HJ/T2.3-93 surface water environment impact evaluation class is determined as Class III. 4 Sound environment
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In the project’s evaluation area there is no special sensitive target added with less noise source with the process noise influence is less. According to Technical Guidelines for Environmental Impact Evaluation · Sound Environment HJ/T2.4- 1995 sound environment impact evaluation class is determined as Class III. 5 Ecological environment This project is designed with no expansion to cover new land surface vegetations are mainly planted artificially. According to Technical Guidelines for Environmental Impact Evaluation · Non-pollution Ecological Influence HJ/T19-1997 it is judged the ecological environmental impact evaluation as Class III for simple process. 6 Risk evaluation
According to relevant stipulations of Technical Guidelines for Construction Project
Environmental Risk Evaluation (HJ/T169-2004) and factors such as danger of
substances, functional unit and significant dangerous source involved by construction
project and surrounding environmental sensitivity extent of this project as well as
judgment results, etc this project’s environmental risk evaluation class can be
determined. Specific evaluation classification is determined as Form 1-3.
Form 1-3 Risk Evaluation Classification Form Deadly General-toxicity Inflammable, Explosion- Items Poisonous Dangerous Combustible danger Substance Substance Substance Substance Significant dangerous 1 2 1 1 source Non-significant 2 2 2 2 dangerous source Environment-sensitive 1 1 1 1 Region On the basis of analysis of materials and intermediate products involved by all equipment areas hold-up of deadly poisonous substance involved by this project during normal production does not exceed the limited value for poisonous substance
critical amount in Form 3 of Identification of Significant Dangerous Source GB18218- 2000 not belonging to significant dangerous source. According to classification form
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Range of evaluation of discharge influence on groundwater environment covers groundwater from master discharge outlet of wastewater to areas along both sides of sewer pipe and sewage comprehensive utilization area.
3 Sound environment
Evaluation range planned project farm boundary noise is 1m outside the farm boundary.
4 Ecological environment Evaluation range farm boundary range. 5 Risk evaluation Evaluation range this project’s environment risk evaluation class is Class II. According to relevant stipulations of Technical Guidelines for Construction Project Environmental Risk Evaluation (HJ/T169-2004) the area with this project equipment area as center and 3km as radius is taken as this project’s risk evaluation range. 1.4.2 Evaluation standard 1.4.2.1Environmental quality standard 1 Environmental air quality standard
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Class II standard in Environment Air Quality Standard GB3095-1996 is executed as environmental air quality evaluation standard revised on Jan. 6, 2000 by State Environmental Protection Administration see Form 1-4.
Form 1-4 Environmental Air Quality Evaluation Standard Unit mg/Nm3 Pollutant NO SO TSP Item 2 2 Annual average 0.08 0.06 0.20 Class II Daily average 0.12 0.15 0.30 Hourly average average 0.24 0.50 2 Water environmental quality standard
Groundwater
Class III standard in Groundwater Quality Standard GB/T14848-93 is executed as groundwater quality evaluation standard see Form 1-5.
Form 1-5 Groundwater Environmental Quality Standard
Unit mg/l PH excluded Standard Value mg/L(pH value S. No. Item excluded) Class 1 PH 6.5 8.5 2 Permanganate index 3.0 3 Cl 250
4 NH3-N 0.2 5 Sulfate 250 6 Total hardness 450 7 As 0.01 8 Cd 0.01 9 Cr6+ 0.05 10 CN- 0.05 11 Hg 0.001
3 Sound environmental quality standard
Class II area standard in Urban Area Environmental Noise Standard GB3096- 93 is executed as sound environmental quality evaluation standard see Form 1-6.
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Form 1-6 Noise Evaluation Standard Standard Value dB(A) Suitable Area Standard Source Daytime Nighttime Environment 60 50 GB3096-93 noise 1.4.2.2 Pollutant emission standard
1 Exhaust Class II area standard in Boiler Atmospheric Pollutant Emission Standard GB13271-2001 is executed for project exhaust emission, see Form 1-7.
Form 1-7 Boiler Atmospheric Pollutant Emission Standard Smoke SO Emission 2 Emission NO2 Emission Type of Boiler Suitable Area Concentration Concentration Concentration 3 3 3 mg/m mg/m mg/m Time stage II Boiler Class II area 200 900 / 2 Wastewater
New pollution source Class II standard in Sewage Comprehensive Emission
Standard GB8978-1996 is executed after production and domestic sewage is treated.
Form 1-8 Sewage Comprehensive Emission standard mg/L pH excluded Class Standard Class Standard S. No. Item Value Value 1 pH 6 9 6 9 2 SS 150 400 3 CODCr 300 1000 4 BOD5 100 600 3 Noise With respect to noise at boundary of farm, Class II standard in “Standard of noise at boundary of industrial enterprises”(GB12348-2008), namely daytime 60dB(A) and nighttime 50dB(A), shall apply.
4 Solid waste
For common solid waste, General Industrial Solid Waste Storage and Disposal
Yard Pollution Control Standard GB 18599-2001 will be executed.
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1.4.2.3 Control standard
1 Limited Value for Building Construction Boundary Noise GB12523-90 2 Hygienic Standard for Industrial Enterprise Design(GBZ1-2002). 1.5 Environmental protection target 1 Through water environmental impact evaluation to determine reasonable discharge plan and route to make discharged wastewater reach corresponding standard for new pollution source in Sewage Comprehensive Emission Standard GB8978- 1996 , prevent the farm-discharged wastewater’s pollutant to surface water environment, protect quality of groundwater in sewage residence area from reducing use functions of existing water and make the quality in conformity with Class III standard in
Groundwater Quality Standard GB/T14848 93 .
2 Water-saving measures should be adopted in this project in order to protect
water resources in the project area, guarantee project water intake within exploiting
range reasonably exploit groundwater and not influence volume of groundwater
resources in project area. 3 To protect environment air quality in evaluation area and make the environmental quality able to remain at current Class II quality level and not worsen due to construction of the project.
4 To reasonably dispose solid waste discharged from the farm avoid unfavorable influence of wastes and residues on human body, water body, soil, vegetation and animal. 5 To control noise disturbance of residents with noise emission reaching Class
II standard in Industrial Enterprise Boundary Noise Standard GB12348-90 . 6 To reasonably arrange construction progress during project construction period so as to minimize construction influence on local residents and their living environment.
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2. General Situation of Regional Environment 2.1 General situation of natural environment 1 Geographical position Aksu City is located at west Xinjiang Uygur Autonomous Region and neighbors Shaya County in the east Keping and Wushi Counties in the west Awati, Luopu and Cele Counties in the south and Wensu and Xinhe Counties in the north, with geographical coordinate 79°39 82°01 E and 39°31 41°27 N, 989km from Urumqi
City and 466km from Kashi City. Geographical position of project area is shown as Map 2-1.
2 Topography, landforms
Aksu City is located at the southern foot of Tianshan Mountains and northern brink of Tarim Basin in Xinjiang Uygur Autonomous Region Tianshan Mountains with altitude between 980m 1410m higher in northwest and inclined gradually to southeast. The highest point is at Peak Tuomuer the lowest point at area on both sides of Tarim River consisting of three major areas of Tianshan Mountains area, plain and desert from the higher to the lower respectively.
Planned discharge outlet is at the fruits forest southeast of the current farm site.
3 Climate and meteorological conditions
This region enjoys typical continental south temperate zone arid climate, characterized by hot summer and cold winter, sharp temperature difference, long dry period, less precipitation, sufficient sunlight, more wind but less rain and snow, more sandy wind, high evaporation and dry weather. The meteorological characters as follows Annual average temperature 9.8 Extremely highest temperature 40.7
Extremely lowest temperature -27.6 Relative humidity 57% Annual average precipitation 63.6mm
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Annual average evaporation 1890.1mm Max frozen soil depth 134cm Dominating wind direction in a year N, NNW Annual average wind velocity 1.5m/s 4 Geological conditions for the project The site underground natural sedimentary strata rock character is stratified stability with certain regular pattern and relatively stable mechanical properties. Stratum is mainly weak soil type, type of the site is Type silt layer bearing capacity standard value 120Kpa fine sand layer bearing capacity standard value 130Kpa silt clay layer bearing capacity standard value 130Kpa.
The planned construction area belongs to Tailan River alluvial and diluvial gravel fine soil plain and stratum rock mainly consists of silt sand and fine sand.
According to Seismic Ground Motion Parameters Zonation of China GB18306-
2001 , urban area basic seismic intensity is Scale and seismic acceleration value
0.2g.
5 Hydrological and hydrogeological conditions
a. Surface water
Main rivers in Aksu City include Aksu River and Duolang Channel. Aksu River rises in southern Tianshan Mountains and through confluence of Kumalak River and
Tuoshigan River, with annual total runoff of 58.7×108m3 flowing through intermonate valleys in Wushi and Wensu counties passing through Aksu City’s territory by more than 70km from the north to the south, and going into Tarim River at Xiaojiake stretching 132km totally. The river is a major one in Aksu Prefecture and main surface water source for industry, agriculture and people’s daily life a multi- function water body.
100m southeast side to the project area there is an artificial channel passing southwestward. The artificial channel is an agricultural one for irrigation of Group 8 and
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Group 2 of Experimental Forest Farm. In project area the channel is about 1.5 meter wide and 1 meter deep with bottom of cement slab. b. Groundwater Aksu City is at Wensu piedmont basin underground water overflow zone. On Aksu River alluvial delta rivers and channels crisscross preparing good conditions for groundwater distribution and storage, where groundwater basically belongs to pore water and water is rich. In the whole territory of the city, groundwater makeup volume is 816.3 million m3 groundwater dynamic reserve about 499 million m3 mineralization 1 2g/l PH 7 8, groundwater drawing cost higher. Currently the water is mainly used for development and utilization for urban production and domestic consumption.
Currently farm area underground water level depth of burying is 6.0m. Desert sewage residence region underground water level depth of burying 2.4 3.6m. 2.2 General situation of social and economic environment 2.2.1 General situation of social environment in Aksu City Aksu Prefecture is located at southern foot of Tianshan Mountains and northern brink of Tarim Basin of Xinjiang Uygur Autonomous Region with vast land and total area of 132,000 km2. The prefecture has 8 counties of Kuche, Xinhe, Shaya Baicheng, Wensu, Awati, Wushi and Keping and Aksu City under its jurisdiction, and 16 Regimental Farms under Agricultural Division No. 1 of Xinjiang Production and Construction Corps are also in the prefecture. The prefecture has total population of 2.14 million from 36 ethnic groups of which Uygur people and Han people account for 73% and 26% respectively, meaning it a region where multi-ethnic groups live in compact communities with Uygur as main section. The entire prefecture enjoys agreeable climate rich and prosperous water and grass and advanced agriculture and animal husbandry. The prefecture has long enjoyed the good reputation of “Southern- type Field beyond the Great Wall” and “Home of Fish and Rice”. Aksu City is the prefecture’s political, economic and cultural center and the place where the prefecture’s party, political military and the Agricultural Division No.1’s
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leading organizations stations. Aksu City neighbors Shaya County in the east Keping and Wushi Counties in the west Awati, Luopu and Cele Counties in the south, and Wensu and Xinhe Counties in the north. The city covers total area of 18369.9km2, has population of 599,500 constructed area of 28.1km2 urban population of 350,400 from 30 ethnic groups, including Uygur, Han, Hui, Kyrgiz, Russian, Mongol, Kazak, Uzbek Zhuang, Manchu, Xibo, Buyi, Tujia and Miao, etc, of which population from ethnic minority accounts for 45% and Han nationality for 55% of the total population, and population density is 30.5 persons/km2. The city administrates 7 townships, 2 towns and 1 farm, including 130 administrative villages and 12 state-owned farms under Agricultural Division No.1. In 2006 the city realized GDP of 4.18746 billion yuan, a year-on-year up of 14.79%. Agriculture, forestry, animal husbandry and fishery’s total output value reported 810.45 million yuan industrial total output value 994.15 million yuan tertiary industry added value 2.38286 billion yuan, and per capita gross product 11,886 yuan/person. 2.2.2 General situations of Xinjiang Aksu San Jiang breeding Co., Ltd In the project area there is not other industrial and mineral enterprise except for San Jiang Company. San Jiang Company currently boasts various pigpen of 71 buildings with gross area of 60,000 m2 live pig in stock of 70,630 head daily emission of pig’s waste of 136.411t, pig urine of 168.047t and flushing water of 126.862t. At present feces and wastewater flow naturally to constructed open sewage pit (L100m ×W40m×H3m) where it can be clearly found that methane emitted from the pit, after feces adding and slurry mixing and keeping static for 40 45d, will be discharged out from the head discharge outlet at southeast of gate of the farm go through narrow earth channel to provide surrounding orchards with irrigation /liquid fertilizer. According to on-the-spot measurement and calculation by the People’s Republic of China Xinjiang Aksu Live Pig Breeding Farm Biogas project appraisal group, the company’s annual average CO2 emission is about 80,000 m3 per year at present.
6XUYH\LQJÃ3ODQQLQJÃDQGÃ'HLVJQLQJÃ5HVHDUFKÃ,QVWLWXWHÃRIÃ;LQMLDQJÃ3URGXFWLRQÃÉÃ&RQVWUXFWLRQÃ&RUSVÃ -22-Ã Xinjiang Aksu San Jiang Breeding Co., Ltd CDM Biogas Power Generation Project Environmental Impact Report In this project mixed slurry of urine sewage and pig’s waste sewage is 431.32t/d Aksu Prefecture Environmental Monitoring Station’s test of water quality at master discharge outlet of the breeding farm is shown as Form 2-1.
Form 2-1 Test of Water Quality at Master Discharge Outlet of the Breeding Farm Suspended ammonia Fecal Ascaris PH CODcr BOD5 matter nitrogen coliform egg Master discharge 7.36 7.37 1893.75 1536.3 321 398.935 20000 3.5 outlet Evaluation 6 9 400 150 200 80 10000 2 standard San Jiang Breeding Farm’s sewage emission volume at present is about 430t/d 156,000 t/a CODcr emission value about 0.8t/d 292t/a . 2.3 Environment of project area Xinjiang Aksu San Jiang breeding Co., Ltd is located at east of Group 8 of
Xinjiang Aksu Prefecture Experimental Forest Farm and project area is about 1.5km from headquarters of the Group 8, which is equipped with farmland of about 1000 mu and total population of about 300 from 130 households with orchard as main industry.
Near the group headquarters it is residential area of the group including school and hospital. The school is at the north of the headquarters about 1.6km from San Jiang
Company, with teachers and students of about 1800. The hospital is at the southwest of the headquarters serving as a local community health service station, consisting of 8 beds for patients. The project area is 1km west from headquarters of Group 2 which is equipped with total farmland of about 2600 mu and total population of about 571 from 184 households with orchard and cotton planting as main industries. Southeast of the project area is gate of San Jiang Company with simply-built asphalt-paved road directly to experimental forest farm about 3km from National Highway 314. Environment of project area is shown as Fig. 2 2.
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San Jiang Group 2headqu
school
Group 8headqu
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3 Analysis of the Project 3.1 General situations of the project 3.1.1 Basic situations of the project Name of the project Xinjiang Aksu San Jiang breeding Co., Ltd CDM biogas power generation project Construction unit Xinjiang Aksu San Jiang breeding Co., Ltd Construction site North in farm area of breeding farm of Xinjiang Aksu San Jiang Breeding Co., Ltd Project gross investment 36,104,002 yuan
Project labor force quota 6 people
Technical indexes see form 3-1. Form 3-1 Basic Technical Indexes of the Planned Project Item Index Remark Power generation capacity 8.216 million kw·h/a Self power consumption 10% ratio Power supply capacity 7.469 million kw·h/a 28.395 million For temperature rising of fermentation device Heat output kilocalorie/d in the farm Mixed slurry of pig urine and pig’s Raw materials 431.3t/d waste sewage Biogas output 4.145 million m3/a All for power generation Biogas slurry output 144,000 t/a Biogas residue output 7154t/a Dry biogas residue
Construction scale to make biogas by utilizing feces and wastewater from live pig in stock of about 70630 heads per year of Xinjiang Aksu San Jiang breeding Co., Ltd. It is planned to adopt six sets of domestic good-performance improved 1000m3 USR anaerobic reactor to annually produce biogas of 4.1455 million m3 and realize total output of electricity of 8.216 million kw·h/a. Except for self power consumption, electricity transmitted out is 7.469 million kw·h/a. This project is designed with capacity of processing breeding farm’s pig urine and pig’s waste sewage-mixed slurry of 431.3t/d to annually produce biogas slurry of 144,100 tons. Through solid-liquid separation, dry
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3.1.2 Main design parameters (1) Main construction works quantities Form 3 2 Summary of Main Construction Works Quantities S. Description of Main Works Volume/Area Structure No. 3 1 Dirty mire pond 6m ×3 Brick-concrete structure without top and cover 3 2 Regulating reservoir 50 m All steel-concrete structure with top but no cover 3 3 Collecting basin 40m ×4 Steel-concrete bottom cover, brick-concrete basin wall, with top but no cover 3 3 4 200M acidization pond 200m ×2 All steel-concrete structure 3 200M biogas mud sump with top but no cover 3 3 5 200M biogas mud sump 200m ×2 All steel-concrete structure with top but no cover 2 6 Feces-grass separator room 151.8 m Brick-concrete wall .steel- concrete roof 2 7 Solid-liquid separator room 131.8 m Brick-concrete wall .steel- concrete roof 2 8 Biogas purifying pump room 81.25 m Brick-concrete wall .steel- concrete roof 2 9 Power generator room 100 m brick-concrete wall .steel- concrete roof 2 10 Gate security room 52 m brick-concrete wall .steel- concrete roof 3 11 Water pond with gas storage 2000m ×2 All steel-concrete structure tank including heat-insulation steel-structure top cover layer 3 12 Anaerobic reactor including 1000m ×6 All steel-concrete structure, heat-insulation layer with top cover, air-tight
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3 13 Field simply-made liquid storage 10000 m ×2 Earth basin compaction tank added with impervious membrane without top and cover 14 Enclosure, road, gate and sewage One set brick-concrete structure ditch, etc
(2) Main equipment
Form 3 3 Summary of Main Equipment S. Description of Main Works Unit Quantity Size/Model No. 1 Feces-grass separator Set 1 YJ-600 2 Feeding pump (single bolt Set 4 G80/7.5KW pump) 3 Model 1000 anaerobic overflow Set 18 Stainless steel meter Model YL-1000 4 Model 1000 anaerobic water Set 72 Stainless steel distributor Model BS—1000 5 4PW sewage pump Set 2 4PW/5.5KW 6 3NL underground water cutting Set 8 3NL/3.0 KW sludge pump 7 3 2000M biogas storage tank Set 2 Construction steel cover according to drawing 8 Biogas quick desulphurizer Set 6 Model TL-A 9 Biogas dehydrater Set 6 Stainless steel Model CS-800 10 Biogas anti-inverse-flow device Set 6 Stainless steel Model FDL-600 11 Biogas flowmeter Set 6 100m3/h 12 Biogas flame arrester Set 6 GZ-2 13 3 Anaerobic reactor inside filling m 1536 XTL-100*150 and filling frame 14 Biogas station electric control Set 3 XGL-11H-X(Q) panel general 15 Biogas station electric control Set 6 BOFA-6H-X(Q) cabinet branch
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16 Steel-made biogas condensate Set 8 Model TS-500 collecting well 17 Indoor hot water pool for cold Set 22 Local, common season 18 500KW generator set Set 3 500GF-Z 19 Power generator heat- Set 4 Stainless steel transformation facilities Model Y1200 20 Power generation, transmission Set 3 Power generator and distribution facilities auxiliary equipment 21 Generator set refrigerating BR01-5+5 Set 3 facilities 22 1211dry powder fire Set 4 MYT40 extinguisher 23 Extruded solid-liquid separator Set 6 LJF- /4.0KW 24 Biogas torch Set 2 80m3/h
3.2 Analysis of process flow
3.2.1 Brief description of process flow
Existing process flow San Jiang Company and that after completion of the project see Chart 3-1.
Chart 3-1, broken line indicates newly-built works of the project, mainly including firedamp power generation and innocuously treatment of solid waste, and reconstruction of existing facilities of San Jiang Company.
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the project’s process flow is as follows
1. Pretreatment Sewage goes into feces/grass separating device through ditch and pipeline naturally and wastewater first goes through grid where weed and large suspended articles can be removed then through sand-sinking well to remove sand in wastewater so as to be favorable for treatment in next processes and reduce block of pipeline, etc, then wastewater flows into collecting basin naturally.
2, hydrolyzation and acidization
As animal husbandry wastewater is characterized by frequent sterilization and higher suspended substance contents and boasts higher fiber content as well as contains a great quantities of suspended particulates. In order to make sterilized pig’s waste urine sewage not influence anaerobic reaction to make biogas anaerobic reaction liquid after slurry mixing is acidized for 1-2 days first to make pH value controlled at about 7. At the same time, floating residue and muddy sand blocking feeding pipeline should be removed to guarantee normal biogas making from anaerobic reaction and adjust biogas-consumption peak and power consumption peak for purpose of storing raw materials. Role of hydrolyzation and acidization is to degrade partial suspended substance and transform complicated organic matters into simple organic matters, adjust carbon-hydrogen proportion and pH value at the same time and improve animal husbandry wastewater’s bio-chemical properties favorable to anaerobic digestion.
3. Anaerobic reactor
Adoption of improved USR anaerobic reaction process can effectively remove
CODcr and BOD5 in sewage.
4. Storage and utilization of biogas It is planned to adopt six sets of domestic good-performance improved 1000m3 USR anaerobic reactor, making the farm equipped with capacity of daily average biogas output of 11358M3 and annual average biogas 4.1455 million M3 in total.
6XUYH\LQJÃ3ODQQLQJÃDQGÃ'HLVJQLQJÃ5HVHDUFKÃ,QVWLWXWHÃRIÃ;LQMLDQJÃ3URGXFWLRQÃÉÃ&RQVWUXFWLRQÃ&RUSVÃ -31-Ã Xinjiang Aksu San Jiang Breeding Co., Ltd CDM Biogas Power Generation Project Environmental Impact Report It is planned to adopt Czech pure biogas power generation heat-power coordinated production set to guarantee output of 2kWh electric energy with per cubic-meter biogas. Residual heat from biogas power generation can be used to warm biogas reactor. 5. Comprehensive utilization of biogas slurry and biogas residue
This biogas project has theoretically daily average output of biogas slurry of 431.3t from which wet biogas residue of about 25t with water content of about 60 percent can be separated daily on average through solid-liquid separation, and clean liquid of about 395t with solid content of about 1 percent daily on average. Biogas residue after the separation can be delivered to orchard, vegetable warm house and nursery warm house where biogas slurry sprinkling irrigation is not available saving a great quantities of pesticides and chemical fertilizer and improving yield and harvest. Clear liquid after the separation is pumped to organic compound fertilizer factory for making organic liquid fertilizer for drip irrigation, infiltration irrigation and soil-less cultivation reducing and removing alkaline, improving soil, preventing and fixing sand, improving quality of agricultural products and increasing yield and output. This project is designed to pump anaerobic-reacted biogas slurry to nearby orchard and vegetable field for sprinkling irrigation. Daily-emitted biogas slurry can improve 15-mu saltings and 5475-musaltingsa year. This project has solid-liquid separation capacity to daily generate wet biogas residue of 25.1t. The wet biogas residue, after sun drying and shattering, water content is about 25%. This project can daily produce dry biogas residue of 19.6t and annually 7154t daily average biogas slurry of 395t and annually 144175t. Dry biogas residue, after shattering, can serve as feed additive and high- efficient organic fertilizer or base material for edible fungus, or as fertilizer for flowers and plants.
6. Biogas slurry storage, transmission and application
Liquid fertilizer after anaerobic reaction must be recovered completely for sprinkling irrigation of nearby orchard, cotton field or road side greening, etc. Main contents include
A. Pipeline-transmission sprinkling irrigation it is economic, hygienic and useful for biogas slurry to be pipeline transmitted for sprinkling irrigation. With this technology, biogas slurry can be pipeline transmitted to nearby 8000-mu orchard and vegetable fields and 400-mu sandy land. With sprinkling irrigation pipeline erected in
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B. Field storage pool pump biogas slurry to 20000M3field storage pool east of biogas station with liquid storage period over 60days. The pool is a ground one, higher than ground. When forage grass base needs fertilizer, only open valve for natural flow saving works and operating expenses. For long-distance sprinkling irrigation, sewage pump is need to increase pressure operating expense is also very low. This project’s process flow is shown as Fig. 3 1. ü ü ü
San Jiang Breeding Farm heating with residual heat from power generation biogas power generation power consumption by biogas station of the breeding farm and power consumption for production in East Industrial Park feces mixing slurry acidization pond and oxygen biogas purification, measurement and storage urine flushing water overflow sand removing adjustment and measurement anaerobic fermentation biogas liquid storage pond 6XUYH\LQJÃ3ODQQLQJÃDQGÃ'HLVJQLQJÃ5HVHDUFKÃ,QVWLWXWHÃRIÃ;LQMLDQJÃ3URGXFWLRQÃÉÃ&RQVWUXFWLRQÃ&RUSVÃ -33-Ã Xinjiang Aksu San Jiang Breeding Co., Ltd CDM Biogas Power Generation Project Environmental Impact Report solid-liquid separation solid substance sun drying and shattering for making organic compound fertilizer separation of clear liquid irrigation of ware house vegetable field or farmland
3.2.2 Explanation of process flow
This project process flow is simple mainly consisting of two sections of biogas generation and power generation. Raw materials San Jiang Company Breeding Farm has pig’s waste discharge of 136411kg/d, pig urine discharge of 168047kg/d pig farm flushing water discharge of 126862kg/d. Currently urine sewage is mixed with waste sewage into mixed slurry with total volume of 431.3t/d. Biogas through high-efficient anaerobic reactor total biogas output can be 11357m3/d(4.1455 million m3/a). Power generation to adopt Czech pure biogas power generation heat-power coordinated production set with output electric energy of 20443.5KWh/d( 7.4619 million KWh/a). Electric energy generated from the project can be transmitted to general distribution box of East Industrial Park 3km from the farm from biogas station power generation general control box by using overhead electric cable for grid operating. The residual heat from biogas power generation can be used for warming biogas reactor to improve biogas productivity.
Biogas slurry and biogas residue biogas slurry volume from the project is 431.3t/d. After sundrying and shattering of biogas residue, dry biogas residue volume will be 19.6t/d(7154 t/d) and 7154t/a biogas slurry discharge will be 406.2t/d(148263t/a).
Dry biogas residue after shattering can serve as feed additive and high-efficient organic fertilizer or edible fungus-use base material. Clear liquid after separation of biogas slurry can be used for irrigation of fruits forest southwest of the breeding farm.
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3.2.3 Materials balance calculation
Project materials balance is shown as Fig. 3 2.
Pretreatment Slurry mixing Fermentation for biogas pig’s waste fermentation raw materials biogas slurry feces-water distribution system 609.3 t/d (add fresh water 202.9t/d) 136411kg/d 431.3t/d 406.2 t/d Pig urine wet biogas residue Sundrying and shattering into dry biogas residue 19.6 t/d (water evaporation 4.5t/d) 168047 kg/d 25.1 t/d flushing water biogas Biogas power generation electric energy 20444kwh/d 126862 kg/d 11357.5m3 Fig. 3-2 Materials Balance Chart
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Form 3-4 Summary of Planned Project’s “Three-waste” Generation Links
Discharge Item Code Description Source Main Pollutant Destination Mode Feces-grass NH , H S stink G separation Pig’s waste water 3 2 Continuous Atmosphere 1 room Solid-liquid NH , H S stink Exhaust G separation Biogas slurry 3 2 Continuous Atmosphere 2 room
G3 generator set Biogas SO2 Continuous Atmosphere Field storage NH , H S stink G4 Biogas slurry 3 2 Continuous Atmosphere pool General W Biogas slurry SS, COD Continuous Discharged outside 1 discharge outlet Wastewater domestic Production and W SS, COD Interrupted Discharged outside 2 sewage office positions To be made into Biogas residue organic fertilizer for S biogas residue Interrupted 1 warehouse comprehensive Solid waste utilization To be delivered to
S2 domestic refuse Positions Interrupted refuse landfill site centrally Feces-grass Feces-grass N Noise Continuous 1 separator separation room
Noise N2 Water pump Pump room Noise Continuous Power N Generator set Noise Continuous 3 generator
1. Atmospheric pollutant Stink is the major atmospheric pollutant from this project, with main stink substance of NH3 and H2S, etc. Ammonia gas is a kind of colorless and strongly irritated gas with olfactory threshold of 0.037ppm hydrogen sulfide is a colorless gas with stink and toxicity with olfactory threshold of 0.0005ppm and smell like rotten egg.
6XUYH\LQJÃ3ODQQLQJÃDQGÃ'HLVJQLQJÃ5HVHDUFKÃ,QVWLWXWHÃRIÃ;LQMLDQJÃ3URGXFWLRQÃÉÃ&RQVWUXFWLRQÃ&RUSVÃ -36-Ã Xinjiang Aksu San Jiang Breeding Co., Ltd CDM Biogas Power Generation Project Environmental Impact Report Stink emission source intensity is shown as Form 3-5. Form 3-5 Stink Emission Source Intensity Stink Emission Source Item NH3 H2S concentration Concentration 0.30 0.019 5400(times) (mg/m3) Feces-grass Exhaust separation room 81360 amount(m3/h) Emission rate(kg/h) 0.024 0.002 / Concentration 1.03 6.34 1000(times) (mg/m3) Solid-liquid Exhaust separation room 7500 amount(m3/h) Emission rate(kg/h) 0.008 0.048 / Concentration 0.86 6.24 900(times) (mg/m3) Field storage pool Exhaust 7365 amount(m3/h) Emission rate(kg/h) 0.007 0.044 /
During biogas power generation, SO2 and biogas slurry are made, of which SO2 emission is 0.2t/a calculation process refers to materials balance .
2. Water pollutant
Pollutant change situations during pig urine treatment in this project are shown as Form 3 6.
Form 3 6 Pollutant Changes during Sewage Treatment Unit:mg/L
Number of fecal Ascaris Total Total S. Main BOD5 CODcr NH3 N coliform(piece/L) Eggs TS(kg) Sewage No. Descriptions (piece/L) (t) 1 Feces and 6000 10000 600 16000 40 3138 294.9 urine sewage 2 Grid 5000 8000 480 16000 40 3138 294.9 chamber,
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4. Environmental present situation investigation and analysis 4.1 Environmental present situation investigation 1 According to on-the-spot investigation and information offered by construction unit, San Jiang Breeding Farm’s environmental present situation is shown as following figure
Methane gas, bad smell
pig’s waste 136411kg/d Pig urine 168047kg/d Pig flushing water farm 126862kg/d Septic tank
Slaughering wastewater 6842kg/d biogas slurry Butcher 438162kg/d y
Fruits forest Machinery noise
)LJ 6DQ-LDQJ Biogas slurry infiltration to groundwater in fruits/forest area
2 Form 4 1 Present Situation of Project Pollutant Generation and Treatment Source Pollutant Output Treatment Discharge to Influence Mode pig farm Pig’s feces 136411kg/d Mixing Septic tank Pig urine 168047kg/d and Flushing 126862kg/d gathering water Butchery Slaughtering 6842kg/d wastewater Machinery 75 95dbA noise Septic Methane gas 6325m3/h Atmospheric Methane tank gas emission can be seen clearly bad smell 81360 m3/h Atmospheric With influence on human body within 300m Mixing 438162kg/d Fruits woods wastewater Fruits COD 1893.75mg/l Groundwater woods BOD 1536.3 mg/l SS 321 mg/l
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Standard Value mg/L(pH value excluded) S. No. Item Monitoring Value Type 1 PH 7.36 6 9 2 COD 1893.75 1000 3 BOD 1062.3 600 4 SS 321 400 5 Ammonia nitrogen 398.9 250 6 Total bacteria 3.5 106 450 7 Fecal coliform 16000 0.01 3 Investigation of project surrounding environment
Xinjiang Aksu San Jiang breeding Co., Ltd’s surrounding environmental sensitive points mainly include Group 8 and 2 of Aksu Experimental Forest Farm Group 8 school and Group 8 community health service station. Evaluation of regional environmental sensitive target seel Form 4 3. For position, see Fig. 2-2. Form 4 3 Evaluation of Eegional Environment Sensitive Target
Relative Environmenta Sensitive Target Position to Remark l Function Farm Site Political Group 8 headquarters WS(1.5km) center Political Group 2 headquarters E (1.0km) center Residential Environmental Residential area of Group 8 W About 300 people area Cultural and air Group 8 school Xiachengxi W( 1.6km) educational About 1800 students Elementary School area Group 8 hospital community WS (1.4km) Hospital health service station
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Xinjiang Aksu San Jiang breeding Co., Ltd is located at east of Group 8 of Xinjiang Aksu Prefecture Experimental Forest Farm and project area is about 1.5km from headquarters of the
Group 8, and about 1.6km from San Jiang Company. The school has teachers and students of about
1800, the hospital is at the southwest of the headquarters, serving as a local community health service station and consisting of 8 beds for patients. The project area is 1km west of headquarters of
Group 2 which is equipped with total farmland of about 2600 mu and total population about 571 from 184 households with orchard and cotton planting as main industries. Southeast of the project area is gate of San Jiang Company with simply-built asphalt-paved road directly to experimental forest farm about 3km from National Highway 314. 4.2 Air environment present situation investigation and evaluation In order to understand present situation of environmental air quality in project area, combining natural environment characters and the project’s pollution source characters Aksu Prefecture Environment Monitoring Station is entrusted with monitoring of present situation of environmental air quality in evaluation area. 4.2.1 Arrangement of monitoring points According to geographical position characters in evaluation area and surrounding topography and landforms, enterprise and crowd distribution as well as yearly dominating wind direction in the region and combining character of this project’s pollutant and evaluation range one
monitoring point is planned to be arranged in the farm area for environmental impact evaluation. 4.2.2 Monitoring item Considering character of pollution source of the planned project, SO2, NO2 and TSP are selected as monitoring factors in this monitoring.
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Monitoring frequency SO2, NO2 monitoring, at least 18 hours per day, and at least 45 minutes of each hour serve as sampling time for TSP, at least 12hours a day as sampling time . 4.2.4 Monitoring and analysis method Sampling and analysis method of monitoring items of the planned project will be subject to Technical Stipulations on Air and Exhaust Monitoring Quality Guarantee of Atmospheric and Exhaust Section, Volume 2 of Technical Specifications for Environment Monitoring and requirements of Environment Air Quality Standard (GB3095 1996) released in 1986 by State Environmental Protection Administration 1986. For details, see Form 4-4.
Form 4-4 Monitoring and Analysis Method Analysis Item Sampling Apparatus Sampling Method Analysis Method Apparatus Formol absorption - TH-3000BIVconstant Solution Model 722 Sub SO temperature atmospheric absorption grating spectral 2 rosy sampler method photometer spectrophotometry TH-3000BIVconstant Solution Hydrochloride Model 722 NO2 temperature atmospheric absorption Naphthodiami grating spectral sampler method spectrophotometry photometer BP211S Filter membrane TH-1000C intelligent TSP electronic TSP absorption and Weight method sampler analysis retard balance 4.2.5 Evaluation standard Environmental Air Quality Standard GB3095—1996 and the amended Class II standard . 4.2.6 Monitoring results 4.2.7 Monitoring results analysis (1)Monitoring results Form 4-5 Atmospheric Monitoring Results Unit mg Nm3
Point Item Time Dec.5 Dec. 6 Dec. 7 Dec. 8 Dec. 9 Five-day Position average project SO2 9:00-10:00 0.007 0.008 0.008 0.008 0.004 Area 12:00-13:00 0.013 0.008 0.008 0.008 0.008 16:00-17:00 0.011 0.008 0.008 0.008 0.008 20:00-21.00 0.012 0.008 0.008 0.008 0.008 Daily average 0.011 0.008 0.008 0.008 0.007 0.0084 12Ã 9:00-10:00 0.025 0.031 0.012 0.051 0.044 12:00-13:00 0.042 0.043 0.010 0.037 0.051 16:00-17:00 0.037 0.048 0.009 0.052 0.037 20:00-21.00 0.073 0.034 0.022 0.048 0.047 Daily average 0.044 0.031 0.013 0.047 0.045 0.036 763Ã 9:00-10:00 0.209 0.173 0.346 0.191 0.299 12:00-13:00 0.229 0.140 0.088 0.088 0.320 16:00-17:00 0.322 0.141 0.673 0.178 0.357 6XUYH\LQJÃ3ODQQLQJÃDQGÃ'HLVJQLQJÃ5HVHDUFKÃ,QVWLWXWHÃRIÃ;LQMLDQJÃ3URGXFWLRQÃÉÃ&RQVWUXFWLRQÃ&RUSVÃ -42-Ã Xinjiang Aksu San Jiang Breeding Co., Ltd CDM Biogas Power Generation Project Environmental Impact Report ÃÃ20:00-21.00 0.264 0.140 0.33 0.262 0.227 Daily average 0.256 0.149 0.359 0.180 0.283 0.245 ([SHULP 62Ã 9:00-10:00 0.011 0.008 0.008 0.008 0.008 HQWDOÃ 12:00-13:00 0.011 0.008 0.008 0.008 0.008 )DUPÃ 16:00-17:00 0.011 0.014 0.005 0.006 0.008 *URXSÃÃ KHDGTXD 20:00-21.00 0.011 0.018 0.007 0.009 0.008 UWHUVÃÃ Daily average 0.011 0.012 0.007 0.008 0.008 0.092 12Ã 9:00-10:00 0.029 0.037 0.015 0.037 0.040 12:00-13:00 0.030 0.049 0.009 0.039 0.031 16:00-17:00 0.039 0.037 0.003 0.042 0.051 20:00-21.00 0.040 0.041 0.011 0.075 0.010 Daily average 0.035 0.041 0.010 0.048 0.033 0.033 763Ã 9:00-10:00 0.459 0.208 0.443 0.154 0.428 12:00-13:00 0.520 0.484 0.652 0.462 0.308 16:00-17:00 0.139 0.140 0.347 0.226 0.536 20:00-21.00 0.721 0.172 0.480 0.155 0.223 Daily average 0.460 0.250 0.481 0.249 0.374 0.362 Ã (2)Evaluation results Present situation monitoring evaluation results are shown as Form 4-6. Form 4-6 Present Situation Monitoring Evaluation results Test Point Monitoring Choice of value type Statistical Concentration range Single factor index Over- Over- Project number (mg/m3) range standard standard rate number (%)
Project SO2 Daily average 20 0.004 0.013 0.02 0.08 0 0
area NO2 Daily average 20 0.009 0.073 0.07 0.6 0 0 TSP Daily average 20 0.088 0.673 0.3 2.2 5 25
Grou SO2 Daily average 20 0.005 0.018 0.03 0.12 0 0
p NO2 Daily average 20 0.003 0.075 0.02 0.62 0 0 8headqua TSP Daily average 20 0.139 0.721 0.46 2.4 12 60 rters
(3) Results analysis
From Form 5-3 it can be found that
SO2 in monitoring period and evaluation area two 2 monitoring points’ daily average
concentration meets requirements of Class II-area standard of environmental Air Quality
Standard GB3095-1996 .
NO2 in monitoring period and evaluation area two 2 monitoring points’ daily average
concentration meets requirements of Class II-area standard of environmental Air Quality
Standard GB3095-1996 .
TSP in monitoring period and evaluation area two 2 monitoring points’ daily average
concentration shows over-standard cases with over-standard rate of 25% and 60% respectively.
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Max daily average concentration occurs at Group 8 headquarters monitoring point, with over- standard by 2.4 times.
The above-mentioned statistics and evaluation results show that in evaluation area SO2, and
NO2 daily average concentrations do not exceed standard and certain environmental capacity remains. But TSP daily average concentration meets case of over-standard in monitoring day. TSP over-standard is mainly related to higher TSP content in air under floating dust weather in South
Xinjiang. 4.3 Investigation and evaluation of present situation of water environment 4.3.2 Monitoring and evaluation of groundwater quality present situation Monitoring point position
Monitoring Unit is at Aksu Prefecture Environmental Monitoring Station.
Monitoring method
Monitoring frequency/times and Time non-reoccurring sampling monitoring .
Groundwater level is measured with electric water level meter and water quality analysis method and sampling requirements are strictly subject to Handbook for Guarantee of
Environmental Water Quality Monitoring Quality and Water and Wastewater Monitoring Analysis
Method.
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4 NH3-N 0.025 0.2 5 Sulfate 239 250 6 Total hardness 367 450 7 As 0.004 0.01 8 F 0.98 1.0 9 Cr6+ 0.002 0.05 10 Soluble total solid 730 1000 11 Hg 0.00002 0.001
Groundwater quality is evaluated by adopting single evaluation standard index method.
From data in Form 4-7 it can be found that groundwater water quality in the area is good and all indexes do not exceed standard, Groundwater quality in the area can reach requirements of Class III standard in Groundwater Quality Standard (GB/T14848—1993). 4.4 Investigation and evaluation of present situation of sound environment 4.4.1 Investigation range According to the planned project’s geographical position and project construction composition this sound environment present situation investigation range covers surroundings of the planned project farm boundary and evaluation range extends to area 1m outside the farm boundary. 4.4.2 Monitoring point distribution According to layout of the planned project device, and combining actual situations on the spot, 4 monitoring points are distributed around farm boundary of the planned project for farm site area sound environment monitoring. Position of the monitoring points is shown as Fig. 2-1. 4.4.3 Monitoring method and Time Monitoring method is subject to Urban Environmental Noise Measurement
Method(GB/T14623-93). Monitoring time on Nov. 15, 2007 monitoring was carried out in daytime and nighttime respectively.
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Monitoring was carried out with the method stipulated in Urban Environmental Noise
Measurement (GB/T14623-93). Monitoring results of on-the-spot test of environment equivalent
sound level and noise present situation are shown as Form 4 8.
Form 4 8 Farm Area Environmental Noise Present Situation Monitoring Results Unit dB(A) Daytime Nighttime Monitoring Place Time 2 00 Time 12 20 East 47.2 40.1 South 45.1 39.8 West 55.3 44.3 North 49.6 41.2 Class II standard 60 50 4.4.4 Monitoring results Noise present situation monitoring results show that in evaluation area monitoring points’
environmental noise level can reach requirements of Urban Area Environmental Noise Standard,
and project area environmental noise is in conformity with Class II standard meaning the planned
project farm area surrounding sound environment quality is good. 4.5 Investigation and evaluation of present situations of soil and vegetation environment Construction project type is single with brown desert soil as main section.
In order to understand evaluation area soil environment present situation in this
environmental impact evaluation on-the-spot investigation was made on soil in the project area by
investigating two soil sections and Xinjiang Production and Construction Corps Environmental Monitoring Station analyzed soil physical-chemical indexes and soil fertility factors such as pH, salt, organic matters, total nitrogen, total phosphorus, Cd, Cr, Pb, etc. Analysis results are shown as Form 4-9. Form 4-9 Soil Monitoring Statistical Results Unit mg/kg pH excluded Total Organic Soil Total Total No. pH salt matters Cadmium Lead Chromium type nitrogen phosphorus g/kg g/kg Brown Section desert 8.31 3.16 4.28 0.231 0.542 14.138 12.421 0.0654 1 soil Section Brown 8.24 4.42 2.62 0.149 0.463 14.023 12.236 0.0639
2 desert 6XUYH\LQJÃ3ODQQLQJÃDQGÃ'HLVJQLQJÃ5HVHDUFKÃ,QVWLWXWHÃRIÃ;LQMLDQJÃ3URGXFWLRQÃÉÃ&RQVWUXFWLRQÃ&RUSVÃ -46-Ã Xinjiang Aksu San Jiang Breeding Co., Ltd CDM Biogas Power Generation Project Environmental Impact Report 2 desert soil
Soil salinization classification standard and nutrient classification standard in Interim Technical Regulations of Nationwide Secondary General Survey of Soil are adopted as evaluation standard see Form 4-10, Form 4-11 and Class II standard in Soil Environment Quality Standard GB15618-1995 see Form 4-12 . Form 4-10 Soil Salinization Classification Standard Non- Light Medium Strong Salinization Extent salinizatio Saline soil salinization salinization salinization n Total salt (g·kg-1) 3 3-5 5-10 10-20 20 Form 4-11 Soil Nutrient Classification Nutrie Complete (g·kg-1) Quick-active (mg·kg-1) Organic matters nt -1 (g·kg ) N P K Class 2 30-40 1.5-2.00 20-40 150-200 3 20-30 1.0-1.5 10-20 100-150 4 10-20 0.75-1.0 5-10 50-100 5 6-10 0.5-0.75 3-5 30-50 6 6.0 0.5 3 30 Form 4-12 Soil Environment Quality Standard Unit mg/kg Class Item Class 1 Class 2 Class 3 Natural 6.6 7.5 >7.5 >6.5 background <6.5 Chromium dry farm 90 150 200 250 300 cadmium 0.20 0.30 0.30 0.60 1.0 Lead 35 250 300 350 500 Referring Form 4-4-2 in project area typical-part brown desert soil’s organic matters content is under Class 6 soil fertility is extremely low. From Form 4-4-4 it can be found that in soil sample monitoring results total chromium, cadmium and lead contents all meet Class II standard and soil environment quality is good. In project area natural plant species is single and variety and quantity are less. according to on-the-spot investigation and data analysis in project area common higher plants include salsola collina and Nitraria sibirica, etc. In areas low-lying and with good water conditions, reed grows. Plant community height is generally 15 30cm with total coverage less than 5%. 6XUYH\LQJÃ3ODQQLQJÃDQGÃ'HLVJQLQJÃ5HVHDUFKÃ,QVWLWXWHÃRIÃ;LQMLDQJÃ3URGXFWLRQÃÉÃ&RQVWUXFWLRQÃ&RUSVÃ -47-Ã Xinjiang Aksu San Jiang Breeding Co., Ltd CDM Biogas Power Generation Project Environmental Impact Report
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5 Environmental impact forecast and evaluation 5.1 Air environmental impact forecast and evaluation 5.1.1 Meteorological character analysis 5.1.1.1 Analysis of meteorological character of evaluation area
Air pollutant’s atmospheric diffusion and move law is closely tied with local meteorological conditions, and main meteorological factors influencing atmospheric diffusion include wind frequency, wind direction, wind velocity, temperature and atmospheric stability, etc. In this evaluation area pollution meteorological characters are concluded according to Aksu Meteorological Station’s meteorological data for past five years (observation data such as cloud cover, wind direction and wind velocity, etc) and through statistics, induction, calculation and sorting out by referring to relevant stipulations.
5.1.1.2 Ground wind direction and the change
In evaluation area dominating wind direction in a year is wind N frequency
7.4% the next is wind NNE frequency 6.8% yearly static wind frequency 30.9%. In winter dominating wind direction is wind N frequency 10.6%. Wind direction frequency is shown as Form 5-1, Fig. 5-1. Form 5-1 Wind Direction Frequency Statistical Chart (%)
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N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW C
1 10.8 9.4 2.2 2.7 1.6 3.0 4.8 4.6 7.0 4.0 3.0 1.1 2.4 3.2 4.0 8.9 27.4
2 11.2 10. 0 4.4 1.5 1.8 2.9 3.2 7.9 5.3 2.6 0.9 0.9 2.1 4.7 6.5 16. 5 17. 6
3 10.5 6.7 6.7 4.3 5.1 3.2 4.8 5.1 8.9 4.6 2.7 1.6 2.7 4.6 5.6 7.3 15. 6
4 4.7 7.8 7.5 6.7 3.9 5.0 4.7 8.1 8.1 3.9 2.5 0.6 1.4 5.0 4.4 5.3 20.6
5 4.6 7.0 8.1 1.6 4.6 2.7 5.1 3.2 6.2 4.8 1.3 1.3 4.3 11. 8 10. 5 4.0 18.8
6 2.8 5.8 5.6 1.9 3.3 1.7 3.6 6.7 7.5 4.4 1.7 1.1 3.1 6.9 11. 9 6.1 25.8
7 4.6 1.0 5.9 3.0 3.5 2.4 6.2 4.8 7.5 3.2 2.2 0.5 2.2 5.1 7.5 5.6 31.7
8 7.8 3.5 8.3 1.9 2.7 3.0 3.8 2.4 8.3 2.2 3.5 0.3 1.6 4.0 9.7 4.3 32. 8
9 5.1 4.5 6.2 2.8 5.1 0.8 4.5 1.7 5.6 0.3 1.1 0.6 0.3 0.8 5.6 6.8 48.0
10 6.5 5.4 5.4 3.8 4.8 1.6 5.4 1.1 4.0 1.6 2.2 0.3 1.6 0.5 1.6 6.5 47.8
11 10.3 10.3 5.3 1.7 5.8 2.8 3.9 4.2 3.1 1.7 1.1 0.8 1.9 1.4 3.3 4.2 38.3
12 10.2 7.5 1.6 1.3 1.6 2.2 1.9 4.0 5.1 0.8 0.8 1.1 2.4 1.6 5.1 7.0 45.7
7.4 6.8 5.6 2.8 3.7 2.6 4.3 4.5 6.4 2.9 1.9 0.8 2.2 4.2 6.3 6.8 30.9
Jan. wind frequency rose April wind frequency rose
July wind frequency rose Oct. wind frequency rose
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All-year wind frequency rose
Fig. 5-1 Yearly and Quarterly wind frequency rose
Evaluation shows that in the region ground wind velocity years’ average wind velocity is under 2.0m/s. In winter wind velocity is the lowest with most average wind velocity lower than 1.5m/s. For yearly wind direction and average wind velocity, see
Form 5-2 Fig. 5-2.
Form 5-2 Yearly and Quarterly Wind Directions and Average Wind Velocity Statistical Chart (m/s)
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 N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW
l 1. 5 1. 7 1. 3 2. 3 2. 5 1. 6 1. 8 1. 5 1. 6 1. 8 1. 6 1. 8 1. 8 1 1. 6 1. 5
2 1. 7 1. 8 2. 0 2. 4 2. 3 2. 5 1. 4 1. 9 1. 7 1. 8 1. 7 2. 0 1. 9 1. 9 1. 6 1. 6
3 1. 7 1. 0 2. 6 2. 6 3. 1 2. 6 2. 8 2. 5 2. 4 2. 4 2. 0 3. 2 2. 0 3. 4 2. 1 1. 9
4 1. 5 1. 6 2. 1 3. 5 2. 9 3. 1 2. 4 2. 4 2. 1 2. 5 2. 2 2. 0 3. 6 3. 0 2. 4 1. 4
5 1. 5 2. 0 2. 3 1. 8 2. 0 2. 3 2. 3 1. 9 2. 2 2. 8 1. 6 1. 6 3. 2 4. 1 2. 8 1. 7
6 1.3 1.7 2.0 2.9 3.3 2.7 2.7 2.5 2.6 2.4 2.3 2.3 3.0 3.6 2.9 1.9
7 1. 6 1. 5 2. 4 2. 5 2. 4 2. 7 2. 4 2. 3 2. 6 1. 9 2. 3 1. 5 3. 8 4. 0 2. 7 2. 0
8 1. 4 1. 7 2. 0 2. 0 2. 6 2. 0 2. 2 2. 4 2. 5 2. 4 2. 2 2. 0 2. 3 3. 6 2. 9 2. 1
9 1. 2 1. 3 1. 6 2. 0 2. 5 2. 3 2. 2 1. 7 1. 8 1. 0 2. 8 1. 0 2. 0 2. 3 2. 1 2. 3
10 1. 1 1.5 1. 5 1. 7 1. 8 1. 8 1. 7 1. 3 1. 6 2. 7 2. 3 2. 0 2. 7 2. 0 2. 2 1. 5
1l 1. 3 1. 6 1. 9 2. 7 2. 0 2. 0 2. 4 1. 3 1. 3 1. 8 2. 0 2. 0 1. 3 1. 3 1. 5 1. 3
12 1. 3 1. 5 1. 5 1. 6 1. 7 1. 6 1. 4 1. 5 1. 7 1. 3 1. 3 1. 5 1. 2 2. 0 1. 4 1. 3
1. 5 1.7 2.0 2.5 2.4 2.3 2.2 2.0 2.1 2.3 2.0 2.0 2.5 3.3 2.4 1.7
Jan. average wind velocity rose April average wind velocity rose
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July average wind velocity rose Oct average wind velocity rose
All-year average wind velocity rose
Fig. 5-2 Yearly and quarterly average wind velocity rose
Pollution coefficient is expressed with the ratio of a wind direction’s frequency to the wind direction’s average wind velocity. The region’s annual pollution coefficient has wind N downwind direction as the max with the value of 4.58 wind NNE and wind NNW the next 3.88 and 3.80 respectively. In all seasons, pollution coefficient max positions are basically in conformity with wind direction frequency. Yearly and quarterly pollution coefficient is shown as Form 5-3 Fig. 5-3. Form 5-3 Statistical Chart of Yearly-quarterly Wind Direction Pollution Coefficient
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 1 11( 1( (1( ( (6( 6( 66( 6 66: 6: :6: : :1: 1: 11:
4.21 4.13 3.49 1.59 1.70 1.36 1.95 2.41 3.46 1.73 1.12 0.51 0.95 2.04 2.81 3.2
2.73 3.23 2.93 0.90 1.48 0.88 2.0l 2.19 2.86 1.75 0.84 0.54 0. 96 2.03 3.56 2.80
4.17 2.67 3.40 1.18 1.51 0.89 2.13 1.39 3.10 1.08 0.93 0.31 0.51 1.00 2.96 2.61
7.16 5.38 1.71 0.87 0.77 1.42 2.15 3.37 3.48 1.51 1.02 0.58 1.41 1.58 3.38 7.36
4.58 3.88 2.88 1.16 1.39 1.13 2.05 2.28 3.20 1.55 0.97 0.50 0.91 1.70 3.17 3.80
Spring pollution coefficient rose Summer pollution coefficient rose
Autumn pollution coefficient rose Winter pollution coefficient rose
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All-year pollution coefficient rose
Fig. 5-3 Yearly and quarterly pollution coefficient rose
5.1.1.3 Average wind velocity in months over years
Max average wind velocity in months over years occurs in June, July and Aug., and min in Jan., Feb. and March. Average wind velocity in months over years is shown as Form 5-4. Form 5-4 Average Wind Velocity in Months over Years (m/s) month 1 2 3 4 5 6 7 8 9 10 11 12 year Wind velocity 0.9 1.0 1.2 1.5 1.8 2.0 2.1 2.0 1.8 1.5 1.4 1.2 1.5
To sum up in the area all-year dominating wind direction is wind N the next
NNE yearly static wind frequency 30.9%. The evaluation area’s ground wind velocity years’ average is 1.5m/s, annual pollution coefficient is at highest point with wind N downwind direction max then wind NNE and NNW. In evaluation area atmospheric stability is mainly at medium level (Type D) then the strongly stable level (Type E, F) and strongly instable level (Type A) occurrence frequency the least. 5.1.1.4 Ground meteorological data survey contents 1 Annual ground temperature Aksu City boasts ground average temperature 12.3~13.7 . During December to next February in a year ground average temperature is lower than 0 with Jan. the coldest month average -7.8~-8.2 . In summer average temperature is over 27 with July the hottest month average 30~32 . Aksu City all-year monthly ground average
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temperature is shown as Form 5-5. Aksu City all-year ground average temperature broken-line graph is shown as Fig. 5-4.
Form 5-5 Aksu City All-year Monthly Ground Average Temperature Unit Month 1 2 3 4 5 6 7 8 9 10 11 12 Year Aksu - -2.1 6.7 16.1 23.0 27.4 29.9 27.2 20.9 11.5 1.3 -5.8 12.3 8.2
\HDUJURXQGDYHUDJH 2 Rainfall
7HPSHUDWXUH Fig. 5-4 Aksu City all-year ground average temperature broken-line graph
Aksu City annual rainfall average is 44.6 60.8mm annual change is sharp with
more than 7 times difference between rainy year and less rain year, and up to 18 times
in its southwest area. For example, Shajingzi reported rainfall of 114.3mm in 1972, but only 6.2 mm in 1985. Rainfall in Aksu City is characterized by clear annual change and four-season rainfall is greatly different from each other. In a year rainfall mainly comes during May - September accounting for 80 90% of total rainfall in a year particularly in summer (June—Aug.) rainfall is the most accounting for about 60% of rainfall in a year. In a year rainfall in November is the least only 1mm on average. Aksu City all-year
monthly rainfall is shown as Form 5-6 Aksu City all-year monthly rainfall broken-line graph is shown as Fig. 5 5.
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Fig. 5-6 Aksu City all-year monthly rainfall broken-line graph
5.1.2 Forecast and evaluation of air environmental impact 5.1.2.1 Forecast factor and evaluation standard According to characteristics of project pollution source this evaluation selects the
atmospheric environmental impact forecast factors as follows SO2, NO2, TSP. Evaluation standard Class II mixed area standard in Environmental Air Quality
Standard GB3095-1996 Modified on Jan. 6, 2000 by State Environmental Protection Administration . 5.1.2.2 Forecast range According to project pollution character, project scale, exhaust source emission character, environmental impact regional function and natural environment conditions air environment evaluation area range stretches from the planned farm area as the center to dominating wind direction by 4km and non-dominating wind direction by 2km respectively making a zone with area of 32km2 . 5.1.2.3 Selection of atmospheric diffusion mode
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This atmospheric environmental impact forecast adopts normal smoke plume Gaussian point source correction algorithm for forecast.
1 Wind 10m from ground , average wind velocity U10 1.5m/s point source diffusion mode With exhaust pipe ground position as original point downwind ground any point
(X Y) less-than-24hour sampling time concentration c (mg/m3) to be calculated as the following formula Q Y 2 c = exp− ·F π σ σ σ 2 2 U y z 2 y +k (2nh − H ) 2 (2nh + H ) 2 F = ∑ exp− e + exp− e σ 2 σ 2 n=−k 2 z 2 z H 2 This atmospheric evaluation is Class III k=0 F = 2exp(− e ) σ 2 2 z Exhaust pipe downwind primary 30min sampling time max ground
3 concentration Cm(mg/m ) and its distance from exhaust pipe Xm(m) to be calculated as the following formula 2Q c ()X = m m π 2 e. .U.H e .P1 − 2γ •γ a1 / a2 = 1 2 In which P1 1 a 1 a 1 a a (1+ 1 ) (1− 1 ) (1− 1 ) (1+ 1 ) 2 a2 • He 2 a2 • e 2 a2 a2 He a − = 1/ a2 + 1 (1/ 2a2 ) Xm ( ) (1 ) r2 a2 In which Q——Unit Time emission mg/s U——average wind velocity at outlet of exhaust pipe m/s.
h——thickness of mixed layers m
He——exhaust pipe effective height , m
P means wind velocity height index.
2 With static wind, point source diffusion mode:
2Q C (x, y) = • G L (2π )3 / 2 γ η 2 o2
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γ 2 η 2 = (x 2 + Y 2 01 •+ H 2 ) γ 2 e 02
− 2 γ 2 G=e u /2 01 •{1+ 2π•ses /2 •φ(s)}
1 s − 2 φ(s) = ∫ e t / 2 dt 2π −∞ ux s = γ η 01 In which
01, 02——transversal and plumb diffusion parameter’s regression coefficient
y= x= 01·T 2= 02·T T is diffusion Time S 01· 02 fixed point is shown in HJ/T2.2—93 appendix B.
3 Fumigation mode
Suppose when inversion temperature fades to smoke flow top height
Hf concentration is evenly distributed in plumb direction and horizontal direction remains normal distribution.
Q − Y 2 C = • exp( ) f π σ σ 2 2 Uh f yf 2 yf
In which hf—smoke flow top height hf=He+2.15 z stable
yf—when fumigation occurs, horizontal-direction diffusion σ = σ + → parameter yf y H /8 . 4 one-hour average concentration and daily average concentration forecast Using Gaussian mode average concentration of 30-min-pollutant is calculated. In order to carry out comparable research of calculation results, GB/T13201—91 stipulations can be used to correct transversal diffusion parameter y as the following method q σ = σ t2 y2 y1 t 1 5-7 σ In which y1 transversal diffusion parameter with sampling time as t1
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σ y 2 transversal diffusion parameter with sampling time as t2 . t = 0.5 t = 1 1 2 = One-hour average concentration: q 0.2 . = = = t1 1 t2 24 q 0.3 Daily average concentration: . Pollutant concentration calculated by using corrected transversal diffusion parameter y and the above-mentioned forecast mode is just the one-hour average concentration and daily average concentration. In the above-mentioned mode symbol definition and selection of relevant parameter are executed according to relevant stipulations in HJ/T2.2—93. 5.1.2.4 Forecast results and analysis According to the above statement pollution factor is forecast according to conditions of wind, static wind and fumigation meteorological condition respectively.
Calculation results are analyzed as follows:
a. Atmospheric pollutant concentration forecast results under wind conditions
Under wind conditions taking the area’s annual average wind velocity of
1.7m/s emitted pollutant’s max ground concentration and the ground-level distance area shown as Form 5-7.
Form 5-7 Forecast Results of Pollutants’ Max Ground-level Concentration Cm and
Distance Xm from Exhaust Pipe Max ground-level Type of Stability
concentration Cm distance Xmfrom A B C D E F exhaust pipe 3 CmTSP mg/m 0.019 0.017 0.013 0.010 0.005 0.003 3 CmSO2 mg/m 0.066 0.059 0.045 0.036 0.018 0.010 3 CmNO2 mg/m 0.183 0.164 0.124 0.099 0.051 0.027
Xm m 245 496 832 1421 3880 8877 Form 5-1-11shows that at annual average wind velocity pollutants’ primary max ground-level concentrations are far lower than requirements of Class II standard in
Environmental Air Quality Standard, max ground-level concentration generally occurs under A stability and at place 245m from exhaust pipe.
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b. Forecast results of atmospheric pollutant concentration under static wind conditions Under static wind conditions pollutants’ ground primary concentration and the occurrence distance are shown as Form 5-8.
Form 5-8 Forecast Results of Pollutants’ Axis Ground-level Concentration under
Static Wind Conditions Forecast X direction distance m pollutant stability mg/m3 100 200 300 500 1000 2000 3000 B 0.007 0.007 0.006 0.002 0.001 0.000 0.000 TSP D 0.006 0.006 0.005 0.002 0.001 0.000 0.000 E 0.005 0.005 0.004 0.002 0.001 0.000 0.000 B 0.024 0.023 0.019 0.009 0.003 0.001 0.000 SO2 D 0.022 0.021 0.017 0.008 0.003 0.001 0.000 E 0.018 0.017 0.014 0.006 0.002 0.001 0.000 B 0.067 0.063 0.052 0.024 0.008 0.000 0.001 NO2 D 0.060 0.057 0.047 0.021 0.007 0.000 0.001 E 0.050 0.048 0.039 0.018 0.006 0.000 0.001
The above calculation results show that under static wind conditions pollutant’s
ground-level concentration is higher than under wind conditions but remain lower than
evaluation standard .
c. Forecast results of atmospheric pollutant concentration under fumigation
conditions Under fumigation conditions pollutants’ ground primary concentration and the occurrence distance are shown as Form 5-9.
Form 5-9 Forecast Results of Pollutant Axis Ground-level Concentration
under Fumigation Pollution Conditions Y Forecast Forecast direction X direction distance m time pollutant distance stage m 200 500 1000 2000 3000 4000
PM10 0 0.097 0.056 0.031 0.017 0.011 0.008
Winter SO2 0 0.332 0.191 0.107 0.057 0.038 0.028
NO2 0 0.920 0.529 0.297 0.157 0.104 0.077
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desulphurization efficiency 80% H2S concentration is about 100mg/l biogas goes into biogas power generator some H2S is reacted into SO2 to be emitted out. In emitted gas H2S concentration is about 50mg/l SO2 concentration about 50mg/l and emission 0.2t/a. All items’ pollutant index in emitted gas can reach Atmospheric Pollutant Emission Standard. After the project is completed and put into operation exhaust’s influence on environmental air comes from stink gas of feces-grass separation room, solid-liquid separation room and field storage pool. Emission form is low-level unorganized emission. Therefore according to stipulations, hygienic protecting distance should be calculated. Sewage treatment plant’s stink substance emission volume is related to water quality, treatment scale, local climate, relative humidity, season and treatment process, etc. We take data in Form 3-14 as source intensity to calculate the project’s bad smell hygienic protecting distance so as to calculate hygienic protecting distance that this project needs to set up. Calculation formula is
Q 1 0.5 c = (BLC + 0.25r 2 ) LD Cm A 3 In which Cm——standard concentration limited value, mg/m L——industry enterprise-needed hygienic protecting distance, m Qc——harmful gases unorganized emission volume kg/h r——harmful gases unorganized emission source unit’s equivalent radius, m s 0.5 r = π A, B, C, D——hygienic protecting distance calculation coefficient .
H2S choice of value: 0.002kg/h, 0.048kg/h 0.044kg/h
NH3 choice of value: 0.024kg/h, 0.008kg/h 0.007kg/h Other parameter’s choice of value as follows 3 Cm=0.01mg/m A=750 B=0.021 C=1.85 D=0.84.
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Calculation results: L 200m L 100m L 100m Note feces-grass separation room, solid-liquid separation room field storage pool According to on-the-spot investigation and project general layout feces-grass separation room and solid-liquid separation room are arranged in north of the farm area. In 200m hygienic protecting distance there is no residential community and sensitive point. Hygienic protecting distance range is shown as Fig. 2 2. Field storage pool is outside of San Jiang Company farm area. As this project’s feasibility study report fails to provide field storage construction place this evaluation requires construction unit to guarantee there are no environmental sensitive points such as school and hospital and residential community within range of 100m of surrounding area when selecting field storage pool position.
Stink pollution influence generally includes two aspects one is that people feel unpleased, sick, headache, have a dull appetite and malnutrition, drink water less; and to hinder sleep, make people olfactory disorder, low spirit and be liable to get angry and induce asthma. The other is social and economic damages. For example, stink pollution makes employees work at lower efficiency and area under stink pollution meets impact to economic construction, commercial sales volume and tourism thus to influence economic benefit. Single stink gas’ influence on human body influence; when hydrogen sulfide H2S gas concentration is 0.007ppm it can influence human eyes’ reflection to light. 10ppmof hydrogen sulfide gas concentration is the lowest concentration to irritate human eyes. For another example, if people is exposed to ammonia gas with concentration of 17ppm for 7 8hours NH3 content in their urine will increase, and oxygen consumption will decrease and breath frequency goes down. According to Stink Pollutant Emission Standard stink intensity is divided into six classes for on-the-spot investigation, shown as Form 5-10. Form 5-10 Stink Intensity Classification Intensity Classification Index 0 No smell 1 Barely be able to feel smell feeling threshold 2 Weak smell but the status can be identified comprehension threshold 3 Very easy to feel smell
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4 Strong smell 5 Very strong smell beyond patience During on-the-spot investigation process, 10 unmarried Youngman and young women under age of 30 and with no hobbies of smoke and liquor were organized for on-the-spot offensive odor smelling. They smell at the distances of downwind direction 5, 30, 50, 70, 100, 200, 300m, etc and has upwind direction as contrast for smelling. From smelling statistics it can be found that in 5m range of pollution source downwind direction stronger smell can be felt Class 3 4 in 5 100m range, smell can be felt very easily Class 2 3 at the point of 200m distance, smell is very weak Class 1 2 . According to relevant stipulations in Class II area Class II control standard should be executed offensive odor intensity limited value is Class 3. This project treatment scale is smaller, correspondingly stink intensity is lower. So we think this project’s hygienic protecting distance is reasonable. Existing environmental air quality is good in the evaluation area and environmental capacity is higher as long as corresponding environmental protection measures are taken, it is expected that this project’s construction will make less impact on atmospheric environment in the evaluation area. 5.2 Forecast and evaluation of impact on water environment 5.2.1 Analysis of water environmental pollution source and pollution ways This project is designed to use San Jiang Breeding Farm’s animal and poultry sewage pig’s waste, pig urine and flushing water for fermentation and biogas generation after processing and treatment. Biogas slurry, through fertilizer-water mixing system, will be used for irrigation of fruits forest southwest of San Jiang Breeding Farm with wastewater emission of 609.3 m3/d. Ex-farm biogas slurry’s pollutant indexes can reach Sewage Comprehensive Emission Standard and Farmland Irrigation Water Quality Standard, namely COD 400mg/L, BOD5 150mg/L. Biogas slurry from this project is discharged to fruits forest and cotton field southeast of San Jiang Company through pipeline. The fruits forest covers and area of about 8000 mu. The rest biogas slurry can be discharged to cotton field southeast of the fruits forest making biogas slurry consumed completely. Geographical position of fruits forest and cotton field irrigated with this project’s biogas slurry irrigation is shown as Fig. 2 2.
6XUYH\LQJÃ3ODQQLQJÃDQGÃ'HLVJQLQJÃ5HVHDUFKÃ,QVWLWXWHÃRIÃ;LQMLDQJÃ3URGXFWLRQÃÉÃ&RQVWUXFWLRQÃ&RUSVÃ -64-Ã Xinjiang Aksu San Jiang Breeding Co., Ltd CDM Biogas Power Generation Project Environmental Impact Report 5.2.2 Analysis of impact of biogas slurry discharge on groundwater environment 1 Hydrogeological conditions Surface of sewage residence area is Quaternary covers and surface layer mainly consists of silt sand and silt fine sand. Stratum is interlaid with silt clay interlayer thus forming comprehensive water-bearing group with vertical multi-layer water-bearing stratum and water-resisting layer occurred alternatively namely water-bearing group with underground water upside and pressure water downside. Hydraulic slope is 0.3‰. Topography and groundwater relative distribution information is shown as sewage residence area section diagram Fig. 5 7 and section geological section as bar chart 5 8. 2 Groundwater pollution forecast model Forecast of sewage-carried pollutants’ influence on groundwater is mainly for determining range and extent of groundwater pollution. With pollution movement ways into underground aeration zone and water-bearing stratum, the pollutants pollute groundwater with flowing of groundwater. Aeration zone pollutant movement ways and model Sewage residence area soil layer belongs to stratum rock character, mainly consisting of silt sand, fine sand and thin-layer clay layer. Water level burying-depth is about 1.5m. Extent of sewage to groundwater mainly depends on sewage water quality and sewage’s actual infiltration capacity. Generally sewage infiltration capacity depends on evaporation, rainfall and surface runoff loss. In order to quantitatively determine this project’s standard-level sewage infiltration’s influence extent to groundwater and time for pollutant to pass through aeration zone, pollutant’s absorption in aeration zone and degradation process can be described as aeration zone black box model. Aeration zone black box model is as follows Water volume balance: q1= q0 qp qe qr quality balance: C1q1=(1 A)C0q0e- t1 LFθ t1 = R q1
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For sewer pipeline leakage C1q1=M=(1 A)C0q0 In which q1——sewage volume into water-bearing stratum m3/d; qp, qe, qr——respectively means river water, evaporation and runoff m3/d; C1——pollutant concentration when entering water-bearing stratum mg/L; C0——pollutant concentration mg/L; A——aeration zone’s pollutant removal rate % M——mass flow g/L. Mathematical model of water-bearing stratum pollutant movement Suppose it is in horizontal, equal thickness, single-layer and homogeneous water- bearing stratum initial concentration of pollutant in groundwater is zero pollutant is partial source hereinafter referred to as point source , the concentration is C0 entering with flow Q pollutant will show not only longitudinal dispersion along groundwater flow direction, but transversal dispersion along vertical flow direction this in fact is two-dimensional dispersion in uniflow field, then pollutant’s characteristic value during groundwater movement process can be forecast with two-dimensional water power dispersion formula. mathematical model under the conditions is C 2C 2 y C = DL + Dr − u − λc t X 2 2 y2 x C x,y =0 x,y 0 C ± y,t =0 t 0 C x,± t =0 t 0 In which C——pollutant concentration, mg/L; DL——longitudinal dispersion coefficient, m2/d DT——transversal dispersion coefficient, m2/d X——along water flow direction coordinate, m Y——vertical water flow direction coordinate, m t——time, d ——pollutant degradation constant pb R 1+= kd ne R——pollutant retention factor, pb——soil unit weight in dry weight, g/cm3; kd——pollutant absorption distribution coefficient, ml/g; ne——effective porosity Solution of the definite solution question is C Q C(x, y,t) = 0 W (u, r B) π 4 u DL DT
6XUYH\LQJÃ3ODQQLQJÃDQGÃ'HLVJQLQJÃ5HVHDUFKÃ,QVWLWXWHÃRIÃ;LQMLDQJÃ3URGXFWLRQÃÉÃ&RQVWUXFWLRQÃ&RUSVÃ -66-Ã Xinjiang Aksu San Jiang Breeding Co., Ltd CDM Biogas Power Generation Project Environmental Impact Report 2D B = L v D 2BλR 1 R = [(x 2 + L y 2 )(1+ )] 2 DT v r 2 R u = 2BλR 4Dt(1+ ) v In which v——average pore velocity m/d. Determination of forecast model parameter a. aeration zone forecast model parameter Pollutant’s retention factor and aeration zone’s pollutant removal rate is determined according to test results. Aeration zone forecast parameter is shown as Form 5-11.
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Parameter L(m) pb(g/cm3) q0(m3/d) (1/d)
Choice of 1-1.5 1.14 0.26 5887 0.0035 value b. Mathematical model of water-bearing stratum Water-bearing stratum water volume mathematical model parameter is shown as Form 5-12.
Form 5-12 Water-bearing Stratum Forecast Model Parameter
Parameter u(m/d) m(m) R(COD) ne aL m ax m (1/d)
Choice of 0.002 30 1 0.12 0.12 0.024 0 value Forecast results To calculate sewage residence area water-bearing stratum pollutant concentration according to aeration zone pollutant movement mathematical model. COD pollutant concentration time space distribution calculation results are shown as Form 5-13. Form 5-13 Concentration Distribution Value after Sewage Residence Area COD Entering Water-bearing Stratum for 18250 days mg/L y/x 0.0 500.0 1000 1500 2000 2500 3000 500 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 450 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 400 0.00926 28.4738 10.3824 0.00655 0.00000 0.00000 0.00000 350 0.01875 45.8269 33.5465 0.01668 0.00001 0.00000 0.00000 300 0.01875 45.8269 33.5465 0.01668 0.00001 0.00000 0.00000 250 0.01875 45.8269 33.5465 0.01668 0.00001 0.00000 0.00000 200 0.01875 45.8269 33.5465 0.01668 0.00001 0.00000 0.00000 150 0.01875 45.8269 33.5465 0.01668 0.00001 0.00000 0.00000 100 0.01875 45.8269 33.5465 0.01668 0.00001 0.00000 0.00000 50 0.01875 45.8269 33.5465 0.01668 0.00001 0.00000 0.00000 0 0.01875 45.8269 33.5465 0.01668 0.00001 0.00000 0.00000 -50 0.01875 45.8269 33.5465 0.01668 0.00001 0.00000 0.00000 -100 0.01875 45.8269 33.5465 0.01668 0.00001 0.00000 0.00000 -150 0.01875 45.8269 33.5465 0.01668 0.00001 0.00000 0.00000 -200 0.01875 45.8269 33.5465 0.01668 0.00001 0.00000 0.00000 -250 0.01875 45.8269 33.5465 0.01668 0.00001 0.00000 0.00000 -300 0.01875 45.8269 33.5465 0.01668 0.00001 0.00000 0.00000 -350 0.01875 45.8269 33.5465 0.01668 0.00001 0.00000 0.00000 -400 0.00926 28.4738 10.3824 0.00655 0.00000 0.00000 0.00000 -450 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 -500 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 Absorption hysteresis factor: R=1 attenuation coefficient: =0 From Form 5-13 it can be found that movement speed of COD pollutant in infiltration sewage is max movement distance of 2000m in 50 years and pollutant
6XUYH\LQJÃ3ODQQLQJÃDQGÃ'HLVJQLQJÃ5HVHDUFKÃ,QVWLWXWHÃRIÃ;LQMLDQJÃ3URGXFWLRQÃÉÃ&RQVWUXFWLRQÃ&RUSVÃ -68-Ã Xinjiang Aksu San Jiang Breeding Co., Ltd CDM Biogas Power Generation Project Environmental Impact Report over-standard range is about 1500m but mainly accumulates in sewage residence area surrounding groundwater making less influence on groundwater beyond 1500m downstream. That is to say infiltration sewage, after entering underground water- bearing stratum and through long-time horizontal runoff diffusion, will make less influence on downstream groundwater. According to investigation of sewage residence area surrounding environment, in range of 1.5km along water flow direction there is no distribution of residential community or water intake point of other functions. In up-to-standard sewage insoluble impurity is filtered and absorbed by surface soil and decomposed and utilized by microbe gradually. With moisture absorbed and stored by soil agglomerate structure and absorbed by plant sewage is further purified concentration of organic matters in sewage decreases correspondingly and the underlying pressure water- bearing stratum water-resisting top slab has separation role so pollutants in sewage will not pollute pressure water-bearing stratum in the area, and not change original function of groundwater. 5.3 Analysis of impact on sound environment 5.3.1 Noise source During operation period noise mainly comes from various equipment, pump, machinery and equipment and artificial activities. Noise evaluation is made by adopting analogy and referring to noise of equipment of its kind. 5.3.2 Mode treatment of sound energy attenuation Influence of noise radiated from the planned project noise source will be given mode treatment by following the hereinafter principle. To simplify calculations and control main influence factors. For noise source, statistics will be only given to over-80dB (A) noise points. On premise of meeting project precision, certain safety coefficient should be reserved, and forecast calculation should give consideration to shield effect of sound-source farm building enclosure structure and distance attenuation from sound source to sound bearing point in farm area, and main attenuation factors such as air absorption, etc, while ground effect can be
6XUYH\LQJÃ3ODQQLQJÃDQGÃ'HLVJQLQJÃ5HVHDUFKÃ,QVWLWXWHÃRIÃ;LQMLDQJÃ3URGXFWLRQÃÉÃ&RQVWUXFWLRQÃ&RUSVÃ -69-Ã Xinjiang Aksu San Jiang Breeding Co., Ltd CDM Biogas Power Generation Project Environmental Impact Report ignored. Attenuation caused by rain, snow, mist and temperature is very limited, so the attenuation can be ignored. For noise sources’ intensity, only regular noise reduction measures will be considered. 5.3.3 Forecast mode Method of combination of analogy investigation and mode calculation is adopted for forecast. Forecast parameters of noise source intensity and forecast mode can be gained through analogy monitoring and investigation. Adopting regular mathematical mode, the basic calculation formula is Q LLTL=−+10lg( ) −⋅ Mr ni Pn Wi π 2 4rni 100
In which LPn——sound level at sound-bearing point No. n dB(A)
LWi——sound power level at noise source No. i dB(A)
TL——sound insulation capacity of farm building noise reduction structure dB(A) this forecast takes 40 dB(A)
rni ——distance from noise source No.i to sound-bearing point No. n m
Q——sound source directive factor this forecast supposes that sound source is located at the center of ground taking Q 2
M——sound wave attenuation value dB(A) /100m in atmosphere; this forecast takes 6 dB(A) /100m. 5.3.4 Forecast of farm boundary environmental noise influence Noise forecast value at all sound-bearing points should be superposition sum of background noise value and newly-added noise value. Overlapping calculation formula is
0.1Leq0. 1L eq Leq 10lg[1010 ]
To calculate forecast points’ noise forecast value. Forecast results are shown as Form 5-14. Form 5-14 Environmental Noise Forecast Results
6XUYH\LQJÃ3ODQQLQJÃDQGÃ'HLVJQLQJÃ5HVHDUFKÃ,QVWLWXWHÃRIÃ;LQMLDQJÃ3URGXFWLRQÃÉÃ&RQVWUXFWLRQÃ&RUSVÃ -70-Ã Xinjiang Aksu San Jiang Breeding Co., Ltd CDM Biogas Power Generation Project Environmental Impact Report Daytime Sound Level Nighttime Sound Level Test Description of dB(A) dB(A) point test point Background Forecast Background Forecast No. value value value value Farm north 1 47.2 49.3 40.1 44.8 boundary Farm East 2 45.1 46.2 39.8 41.3 Boundary Farm west 3 55.3 55.4 44.3 44.4 boundary Farm south 4 49.6 50.1 41.2 41.4 boundary According to this project’s design plan, the complete production line basically runs under fully-closed state. Project design will prepared separate rooms for noise equipment such as pump set and separator, etc respectively, add anti-vibration pad, enhance sound-insulation measures in production workshops and office doors and windows, or prepare indoor sound absorption board so as to reduce noise. Taking of the above-mentioned measures can reduce indoor reverberation noise by 8 10dB(A).
From forecast calculation it is found that after sound-insulation treatment through farm building sound-insulation wall equipment noise, after spreading 50m in air, has sound pressure level basically attenuate to extent making no influence on environment.
From layout of project area it can be found that all noise-making workshops are distributed in north of San Jiang Company. Calculation shows that equipment with higher noise basically has distance more than 50m from farm boundary, except for north farm boundary. Outside the north farm boundary it is fruits forest, having not environmental sensitive point, so noise from this project basically has less influence on farm boundary. Daytime and nighttime forecast values at north, east, west and south test points in farm boundary are all in conformity with requirements of Class II standard in Industrial
Enterprise Farm Boundary Noise Standard GB12348-90 . Daytime environmental noise surrounding the farm site basically meets Class II standard in Urban Area
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Environmental Noise Standard. Operation of this project will make less impact on sound environment surrounding farm boundary. To sum up this project’s noise source will make very little contributions to farm boundary noise and surrounding sound environment quality will remain existing level. 5.4 Analysis of solid waste influence The project will daily make dry biogas residue of 19.6t on average or annually 7154t. Dry biogas residue, after shattering, can serve as feed additive and high- efficient organic fertilizer or edible fungus-use base material, guaranteeing zero discharge. 5.5 Brief analysis of environmental impact during construction period Main influences during construction period are described as follows
The planned project’s main construction contents include farm building maintenance, equipment installation, ground pavement, pipeline laying and machinery construction, etc with lower works quantity. During construction period pollution mainly comes from noise of large-sized transportation vehicle and construction machinery, and flying dust from construction as well as small-amount solid waste and sewage, meaning very limited environmental impact during construction period.
Processing from requirements of environmental protection however, during project implementation, works must be seriously down for proper construction plan, construction route and time order in order to minimize impact on environment. 5.5.1Analysis of impact on atmospheric environment during construction period Influence on atmosphere during this project’s construction period mainly comes from dust and secondary flying dust during construction and transportation. Operational dust during construction period mainly comes from farm area leveling and excavation bulk building materials grainy and powder materials handling and mixing process. The operational dust belongs to open non-fixed pollution source. In addition, there is also exhaust pollution from burning diesel by construction machinery, and transportation vehicles tail gas, etc.
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In order to control and relieve influence on atmospheric environment during construction period, the following prevention measures should be taken: 1 To enhance construction management To advocate civilized construction, central construction and quick construction, so as to avoid long-time large-range dust flying on construction site. To properly organize various construction equipment; all building materials should be stored and piled up in fixed place and by types. Bag cement must be piled in special provisional storage; concrete-prefabricated members should be provided by prefabricating factory as far as possible. 2 To improve construction method
To unload bulk materials such as yellow sand and broken stone from dump truck, attention should be paid to enclosing the site so as to avoid pollution to environment by large-quantity of flying dust.
Building materials stacked outdoor for a long time, such as yellow sand and broken stone, etc should be covered with rain cloth or often sprayed with water to keep moist and reduce dust flying.
If on-the-site mixing is needed for small-amount concrete enclosure (for example,
with plastic or canvas sheet, etc) should be made around concrete mixer in order to
reduce cement diffusion to surroundings.
Vehicles going in and out of the construction site will make dust rising from ground. So pavement on entrance/exit for vehicles should be kept clean, and in these area lower speed should be used as far as possible so as to reduce pollution of ground dust flying. 3 To adopt advanced technical equipment During casting foundation and ground floor a lot of concrete is needed, so commodity concrete must be used and transported to construction site with special concrete mixer.
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On the site little cement will be needed. The best way is to use closed tank car to delivery cement to construction site directly from cement plant, and to bunker through pneumatic delivery for standby application avoiding dust flying from opening and ladle-to-ladle. 5.5.2 Analysis of impact on water environment during construction period Wastewater from construction process mainly includes 1 Production wastewater Including slurry water from excavation and drilling holes and cooling and washing water from operation of various construction machinery and equipment. The former always contains great quantities of silt while the latter may contains certain greasy filth.
2 Domestic sewage
It is mainly made from living activities of construction team including canteen water, washing wastewater and toilet flushing water. Domestic sewage contains large quantity of bacteria and pathogen.
3 Construction site cleaning wastewater
This kind of wastewater has limited volume. During construction period, with incomplete sludge facilities, material loss, falling scattered and overflow should be avoided as far as possible.
On construction site water treatment structures such as collecting basin, grit chamber and discharge ditch, etc must be constructed. Muddy water generated in construction should be deposited first and be given drying treatment together with vehicles flushing water and domestic sewage, etc. 5.5.3 Analysis of noise influence during construction period During construction process due to running of various construction machinery and equipment and operation of various vehicles, it is unavoidable to generate noise pollution. Pile driving machine, excavator, bull-dozer, concrete mixer and transportation vehicles, etc used in construction all belong to noise source. According to relevant information, noise situations of main construction machinery are listed in Form 5-15.
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Form 5-15 Construction Machinery and Equipment Noise Description of Construction Average A Sound Level at the Place 10m from Equipment Equipment dB A Excavator 82 Bull-dozer 76 Concrete mixer 84 Crane 82 Road roller 82 Truck 85 From the above form it can be found that noise of construction machinery and equipment on the spot is very high. During actual construction process when various machines work at the same time, various noise sources radiate and overlap mutually noise level will be higher and radiation range larger.
During construction period, in order to reduce noise influence, construction management must be enhanced by controlling construction time and adopting reasonable method. Specific measures are 1 To enhance control of noise pollution source on construction site. When loading or unloading metal materials it is required to lift and place them with care and avoid rough operation and generation of man-made noise pollution.
2 To reasonably arrange construction time and strictly control nighttime operation of high-noise equipment.
3 To replace pneumatic tools by hydraulic ones. 4 To control automobile quantity and traffic density in construction site and automobile horning as far as possible. Through the above-mentioned noise controlling measures, it is expected to control noise during construction period to lowest level so as to reduce noise influence on surrounding sound environment. 5.5.4 Disposal of construction wastes and domestic wastes during construction period Building refuses such as residues and soil, etc and domestic refuses during construction period must be cleared and transported to specified place rather than be
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DW PRVSKHUH ZDW HU QRL VH V RO L GÃ ZDV W H HQYL U RQPHQW HQYL U RQPHQW as schematic diagram shown, we can conclude: Atmosphere environment: atmosphere pollutant arising from A is nearly 5 times than that of B, however, environment influence of B is more than 5 times that of A, it represents that increase of atmosphere pollutant is not merely individual increase, increase of atmosphere pollutant such as increase of SO2 will further reduces capacity of atmosphere environment, results in evident deterioration of local atmosphere environment, as for stink, the increase of stink will result in expanse of influencing area, and increasing number of influenced people. The increase degree of influence of atmosphere environment is more than the increase times of the scale. Water environment: water pollutant of B is about 5 times that of A. the influence scale is direct proportion to the scale. Namely, nearly 5 times. Swage arising from the project can be used as irrigation water for economic crops, which is normal emission, the increase of swage will only result in increase of irrigation area. If irrigation area is ensured, its influence will be direct proportion to swage quantity produced by the project. Noise: noise output of the B is less than 5 times that of A, this is determined by characteristics of noise output. By installing proper noise elimination and reduction
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To sum up, the pollutant quantity produced by 500 thousand-pig project is nearly 5 times that of 100 thousand-pig project, however, the influence of various environment elements is different, the expansion of scale will relatively increase burden on atmosphere environment, as the comparative evaluation is based on the same condition, if and treatment facility for atmosphere pollutant is improved in accompany with expansion of scale, atmosphere environment influence is possibly alleviate to some extent; expansion of scale is comparatively beneficial to solid waste treatment, as well as firedamp utility of farmers inhabited in surrounding area. But the expansion of scale may result in a condition that supply exceeds demand, which will lead to a situation that residue of firedamp is accumulated, this will come out a series of environment problems. Expansion of scale also involve land use, increase of employment, as well as social and economic issue of local pork market. These problems are not stated in this evaluation respectively. If environment protection facilities are improved along with the expansion of scale, in addition, environment protection measures are taken, with regard to environment influence, the expansion is practical.
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6 Environmental risk evaluation
Accident risk generally means sudden incidents of raw and auxiliary materials and products during transportation, storage and use process in uncontrollable state. There is very limited possibility of the occurrence of the incidents and the occurrence is related to multiple factors such as material leakage volume, pollution extent and range, scale of sudden incident, whether the remedy measures are quick and reasonable, etc. This kind of incident is hard to be accurately calculated with figure. But once the accident happens, it will cause considerable influences on surrounding ecological environment and human body health. Purpose of risk evaluation is to analyze and forecast potential danger, harmful factors with construction project, possible sudden incidents during the construction and operation period or substance leakage causing harmful toxic and inflammable explosive, etc personal safety and environmental impact and damage extent and put forward reasonable and feasible prevention, emergency and relief measures, so as to make construction project accident rate, loss and environmental impact reach an acceptable level. 6.1 Environment risk identification and analysis 6.1.1 Material risk identification 6.1.1 Project risk substance and identification Substance with potential danger involved by the project is biogas. Afer purification, biogas is colorless offensive-odor toxic gas. Biogas ignition temperature is 550 650 and air-mixed explosion limit 4.27% 37.59%. Biogas contains little carbon monoxide. As carbon monoxide and human body hemoprotein are very liable to combine and generate carbon oxygen hemoprotein, it can make people suffer oxygen deficiency and toxication. Relevant information shows that in air inhaled by human body, if CO concentration of 240mg/m3 keeps for 3h COHb carbon oxygen hemoprotein in Hb can exceed 10% when CO concentration reaches 292.5mg/m3 it can make people suffer serious headache and dizziness, etc. COHb can rise to 25% when CO concentration reaches 1170mg/m3 inhalation of it for over 60 min can make people knockdown, and COHb rises to about 60% when CO concentration
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6XUYH\LQJÃ3ODQQLQJÃDQGÃ'HLVJQLQJÃ5HVHDUFKÃ,QVWLWXWHÃRIÃ;LQMLDQJÃ3URGXFWLRQÃÉÃ&RQVWUXFWLRQÃ&RUSVÃ -80-Ã Xinjiang Aksu San Jiang Breeding Co., Ltd CDM Biogas Power Generation Project Environmental Impact Report To equipment To people 0.03 Generating serious harm 1% people died 50% people suffer ear diaphragm rupture 0.06 Generating repairable harm 1% people ear diaphragm rupture 0.15 Glass broken 0.4 10% glass damaged Estimation according to relevant mode in Technical Guide for Industrial Danger Evaluation and selection of limit value in forecast mainly gives consideration to protect people’s safety. For harm influence distance, if more than or equal to forecast distance under limit value conditions, it will be defined as harm distance in evaluation, otherwise it will be thought that the risk is less or safety higher. Through calculation it can be found that when explosion accident of this project’s biogas happens, explosion over-compression shock wave dangerous distance is 35m. According to arrangement of this project’s farm area 15 m in northeast direction of biogas gas storage tank it is employees resident area, at present, there are 6 rooms in a single story building, which are within safety range in case that the firedamp storage tank exploded, therefore, preventive measures shall be taken or the rooms shall be moved. With respect to preventive measures, such as to build explosion prevention wall or to dig explosion prevention canal, between biogas storage tank and resident area, (explosion prevention wall shall be 0.5 m higher than that of building to be protected, explosion prevent canal shall be 1m in width, 2.5m in depth, stuffed with straw, waste foam plastic and other low density, high voidage material). As the resident area is facing to firedamp storage tank, it may be greatly influenced, amount of works of protection structure, the professional design department shall invited to design and put into operation after it is examined and approved by safety inspection department concerned. This is not suitable for the project. On principle of people-orientation and being economically applicable, the environment evaluation report suggests that San Jiang Company shall move the employees’ resident houses at least 35m in distance to firedamp storage tank. Whereas resident house move is not included in project design, San Jiang company can settle their employees in the resident district of Group 8, which can reduce cost of such move. Gas storage tank is relatively far away from village, farm, highway and other important buildings, outside the range of safety prevention, the explosion of such tank has no great influence on them.
6XUYH\LQJÃ3ODQQLQJÃDQGÃ'HLVJQLQJÃ5HVHDUFKÃ,QVWLWXWHÃRIÃ;LQMLDQJÃ3URGXFWLRQÃÉÃ&RQVWUXFWLRQÃ&RUSVÃ -81-Ã Xinjiang Aksu San Jiang Breeding Co., Ltd CDM Biogas Power Generation Project Environmental Impact Report 6.3 Emergency plan for accident In terms of safe production, China always sticks to the principle of “Prevention orientation, safety first”, with efforts focusing on prevention. In terms of accident rescue, “Enterprise Self-rescue Orientation, Social Rescue Supporting” principle is practiced. Emergency plan for accident is formulated according to project risk source risk analysis to prevent accident occurrence and reduce accident loss. Therefore it is very necessary to formulate this project’s accident emergency plan. 6.3.1 Accident prevention measures 1 To regularly carry out safety test of equipment; records of test contents, time and personnel should be kept. Safety test frequency and times should beset up according to equipment safety and danger requirements. 2 Biogas pipeline should be equipped with low-pressure alarming and automatic turn-off device, and other equipment should also be equipped with automatic pressure adjustment device; dry distillation square furnace and pipeline should be arranged with steam blowing device and out-spreading device when starting and stopping to prevent biogas burning and explosion to catch fire. 3 Design and selection of pressure containers in device must be carried out strictly according to national standards such as Technical Rules of Supervision of Pressure Container Safety, etc. In terms of materials selection, full consideration should be given to medium corrosion problem. 4 In main workshops and auxiliary rooms corresponding ventilation and air exchange measures should be taken in order to avoid harm to operators by harmful gases. 6.3.2 Accident rescue direct decision-making system Accident rescue direct system is a system to deal with accident rescue treatment after emergent accident happens. The system is very necessary to guarantees quick response to accident, treatment accident, being resolute in decision-making and reduction of loss. It includes organization system, communications and personnel first aid, etc. Therefore, after project is put into production, works should be done to formulate this kind of preliminary plan. 6.3.3.1Organization system
6XUYH\LQJÃ3ODQQLQJÃDQGÃ'HLVJQLQJÃ5HVHDUFKÃ,QVWLWXWHÃRIÃ;LQMLDQJÃ3URGXFWLRQÃÉÃ&RQVWUXFWLRQÃ&RUSVÃ -82-Ã Xinjiang Aksu San Jiang Breeding Co., Ltd CDM Biogas Power Generation Project Environmental Impact Report To establish emergency rescue directorate and emergency rescue team and arrange for full-time personnel to protect equipment distribution and on-the-site rescue. All functional departments should be specifically responsible for first aid to accident. 6.3.3.2Communications Communications system should be guaranteed smooth and without block. When formulating preliminary plan, person-in-charge and the telephone number for contact, and numbers of external contact center and various social rescue organizations should be clarified such as first aid station general and fire brigade, etc. Communications decides quick response ability when accident happens. Communications system should be kept quick and smooth not only during daytime but also in nighttime and holidays and festivals. 6.3.3.3 Safety management The company’s security department will be responsible for fire fighting safety in the company, implement fire fighting regulations, formulate the company’s fire fighting management and farm area vehicles transport management system and properly control fire source, and be responsible for fire fighting safety training and organizing and training fire fighting personnel in the company. 6.4 Prevention countermeasures and suggestions 6.4.1Generally acknowledged prevention accident principle 1 Prevention of accident is an essential component for enterprise to realize good management and guarantee products quality 2 Management personnel and operators must make a concerted effort in activity of preventing accident 3 Top leader of the enterprise is the first responsible one for safety must organize safety production and set a good example 4 Each production position must be prepared with safety principles that is clear and can be familiarly understood by personnel on duty 5 Efforts must be made to gain the most advanced technology and method for safety production. The five principles involve modern many important links in modern corporate management. Following these principles can make possibility and harm of accident reduce to an acceptable level.
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1. General situations of toxic chemicals and dangerous source used and generated by the project in production process
2. Emergency plan implementation area
3. Organization, responsibility and authorizer for control of emergency and accident disaster
4. Emergency state classification and emergency response procedures
5. Emergency equipment, facilities, materials and personnel mobilization system and procedures 6. Emergency notifier and authorizer, relevant personnel and relevant organizations’ communication system and procedures 7. Emergency environment monitoring and accident environmental impact evaluation 8. Emergency prevention measures, measures on cleaning out leakages and method and equipment 9. To provide system and procedures for emergency personnel contact dosage control, personnel evacuation, medical first aid and the public health guarantee
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10. Emergency state termination and accident influence recovery measures 11. Procedures for emergency personnel training, drill and emergency system test 12. Public education of emergency accident and accident information releasing procedures 13. Arrangement and procedures for mobilizing the third-party resources for emergency support 14. Accident record and report procedures 15. Annexes. 6.4.4 Emergency environment monitoring Daily environment monitoring of this project is mainly undertaken by Aksu
Prefecture Environmental Monitoring Station. Proper adjustment of monitoring points on the basis of existing monitoring work, emergency environment monitoring of pollution points of devices and emergency monitoring is mainly relied on Aksu
Prefecture’s emergency monitoring system. It must be guaranteed that relevant personnel get to the accident site within 40 minutes after the occurrence to carry out emergency environment monitoring, with main task of monitoring of exhaust, and wastewater under accident state, analyzing harmful substance concentration in it, determining whether the results are in conformity with national and local standards stipulated, and providing administration basis for decision-making department. After accident happens with devices of the project emergency directing group should quickly organize emergency environment monitoring department to keep monitoring accident site and surrounding environment continuously, understand farm area and sensitive protection target’s environmental air pollutant concentration, wastewater emission volume and emission concentration in time, and appraise accident status, parameter and various pollutants’ diffusion extent.
For specific accident monitoring plan, see Form 6-2.
Form 6-2 Accident Environment Risk Emergency Monitoring Plan
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7 Clean production
Law of the People’s Republic of China on Promotion of Clean Production was adopted on June 29, 2002 in the 28th conference of the Ninth Standing Committee of the National People’s Congress, which stipulates that units going in for production and services and departments for relevant administrations shall organize and implement clean production according to stipulations of the law. Clean production is an important measure for realization of coordinated and sustained economic and environmental development. Its concept is to make prevention and control of pollution running through all the production process and products consumption and uses and generate no and less production wastes, so as to have no and less harm to human body and environment. In short it is to produce clean products of clean environmental protection through clean production process. Enterprise is the subject in implementing clean production and clean production’s target is “improving efficiency, reducing consumption, saving energy and cutting down pollution” so implementation of clean production can not only be favorable to environment , but also favorable to enterprise itself. Implementation of clean production is enterprise’s fundamental requirements and destination. Essence of carrying on clean production lies in practicing pollution prevention and total process control, and it will bring enterprise with inestimable economic, social and environmental benefits. Clean production is a systematic engineering. On the one hand, it advocates to cut down production cost and improve enterprise’s comprehensive benefit through process improvement, equipment renewal, waste reclamation and utilization, etc on the other hand, it emphasizes improvement of enterprise’s management level and of quality of all employees including management personnel and project technical personnel and operating workers in terms of economic idea, environmental awareness and awareness participating in management, technical level and professional ethics. At the same time clean production can also effectively improve labor environment and operation conditions for operating workers, reduce influence of production process on employees’ health, set
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Raw materials index
Raw materials index includes raw materials’ toxicity, ecological influence, regenerability, energy intensity, reclamation and utilization, etc, totaling five aspects. Products index Products index includes products’ sales, use, life optimization and rejection, four aspects. Resources index Resources index includes unit-product water consumption, energy consumption and materials consumption, three aspects. Pollutant generation index
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Pollutant generation index include unit-product exhaust, wastewater and waste, etc, of which wastewater generation index is itemized as wastewater volume, CODcr, BOD5 and SS. 7.2 Clean production index classification According to clean production evaluation index analysis, this technology requires production process clean production level of three-class technical indexes: Class I international clean production advanced level Class II domestic clean production advanced level Class III domestic clean production basic level. 7.3 Quantitative index classification This project quantitatively classifies its clean production advancement of its kind according to domestic same-industry clean production situation proceeding from improving resources energy utilization ratio and reducing environmental pollution relying on industry production process’s character, resources energy utilization and pollutant generation as well as environmental management. 7.4 Clean production index analysis Raw materials index
Main raw materials for the project production are pig’s waste, non-toxic and harmless.
Products index
Main product of this project is electric energy, with very wide uses and belonging to clean product. 7.5 Clean production improvement suggestions In order to better and constantly carry out clean production, the followings are suggested according to characteristics of the project: To strictly execute rules of process and carry out employees’ position training by having technical training course every year to improve employees’ quality.
To enhance production management, reduce leakages and loss of raw materials and control flushing water consumption in workshops.
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To regularly practice maintenance, classify equipment by different performances organize personnel to regularly maintain, repair and reuse old equipment and articles improve equipment availability rate and use rate. To realize chloride-free bleach step by step to further meet clean production requirements. Construction unit is suggested to pass certification of ISO14001environment management system as early as possible, establish and execute internationally-advanced quality, health, safety and environment QHSE comprehensive management system and improve clean production management system. To do well job of management of raw materials, products quality, resources protection and pollution control in real earnest, and strive to practice clean production and prevent pollution to realize pollutant reduction target.
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8 Environmental protection measures 8.1 Measures on environmental protection during construction period 8.1.1 Countermeasures for water environment protection during construction period Wastewater generated during construction process mainly includes production wastewater, domestic sewage and wastewater from construction site cleaning. During construction the above-mentioned wastewater volume is not high. However, if no treatment or improper treatment of them harm to environment will occur similarly. So attentions should be paid to Drainage direction must be stipulated strictly on construction site.
During construction period, with incomplete sludge facilities, material loss, falling scattered and overflow should be avoided as far as possible. On construction site water treatment structures such as collecting basin, grit chamber and discharge ditch, etc must be constructed. Construction muddy water and flushing water generated in construction should be deposited first and be given drying treatment. On construction site soil is piled more. The soil should be cleaned out to specified place in time. Arbitrary dumping is not allowed. 8.1.2 Countermeasures for protection of atmospheric environment during construction period During construction period, a large number of building materials must be used. Handling, stacking, mixing and processing of the materials will make quantities of dust escaping externally. The dust belongs to open non-fixed pollution source flying dust, control of which is considerably hard, but if certain measures in terms of management, construction method and technical equipment, etc can be taken, better control effect can be made. In order to not worsen dust pollution in project construction area, it is suggested to take the following measure:
To enhance construction management
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To advocate civilized construction, central construction and quick construction, so as to avoid long-time large-range dust flying on construction site. To properly organize various construction equipment; all building materials should be stored and piled up in fixed place and by types. Bag cement must be piled in special provisional storage; concrete-prefabricated members should be provided by prefabricating factory as far as possible. When wind velocity is too high, construction should be stopped and building materials such as sand and stone, etc should be covered. improvement construction method To unload bulk materials such as yellow sand and broken stone from dump truck, attention should be paid to enclosing the site so as to avoid pollution to environment by large-quantity of flying dust.
Building materials stacked outdoor for a long time, such as yellow sand and broken stone, etc should be covered with rain cloth or often sprayed with water to keep moist and reduce dust flying.
If on-the-site mixing is needed for small-amount concrete enclosure (for example,
with plastic or canvas sheet, etc) should be made around concrete mixer in order to
reduce cement diffusion to surroundings.
Vehicles going in and out of the construction site will make dust rising from ground. So pavement on entrance/exit for vehicles should be kept clean, and in these area lower speed should be used as far as possible so as to reduce pollution of ground dust flying. To use advanced technical equipment On the site little cement will be needed. The best way is to use closed tank car to delivery cement to construction site directly from cement plant, and to bunker through pneumatic delivery for standby application avoiding dust flying from opening and ladle-to-ladle.
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To enhance control of noise pollution source on construction site. When loading or unloading metal materials it is required to lift and place them with care and avoid rough operation and generation of man-made noise pollution.
To do well job of labor protection, and arrange for personnel working near noise source to wear earplug.
Construction unit should strictly control nighttime operation of high-noise equipment. If continuous operation is a must for special reasons, written application should be submitted to local environmental protection department 10 days in advance for approval, after which construction can be continued. With the above-mentioned comprehensive anti-noise measures, noise during construction period can be controlled to lowest level thus to reduce influence on surrounding residential environment and noise sensitive area. 8.2 Atmospheric pollution prevention countermeasures and measures 1.the biogas pool is adjacent to the northern wall of farm, in cases of unfavorable meteorological condition of atmosphere diffusion, stink pollution control will be
6XUYH\LQJÃ3ODQQLQJÃDQGÃ'HLVJQLQJÃ5HVHDUFKÃ,QVWLWXWHÃRIÃ;LQMLDQJÃ3URGXFWLRQÃÉÃ&RQVWUXFWLRQÃ&RUSVÃ -93-Ã Xinjiang Aksu San Jiang Breeding Co., Ltd CDM Biogas Power Generation Project Environmental Impact Report difficult, the location of biogas pool is recommended to move 15-30m distance from the northern wall of the farm. Meanwhile, greening between farm fence and sludge structure shall be improved, planting tall trees with high disease resistance to reduce stink influence in air environment. 2. advanced fermentation and thorough decomposition technology and closed type fermentation apparatus shall be adopted to minimize stink emission by adjusting material proportion and controlling fermentation condition 3.facilities shall be built in incomplete open structures. 4. management of transportation shall be strengthened. Biogas residue after dehydration shall be removed on time, equipment shall be cleaned regularly, at least once in two days. 5. greening rate of farm area shall be more than 40%, tall trees with high disease resistance such as elm and poplar shall be planted in surrounding area of stink source. Tall trees with high pollution resistance such as elm shall be planted in surrounding area of the farm, which can beautify environment, purify air and reduce stink emission. 8.3 Water pollution prevention countermeasures and measures In pig farm, flushing water consumption should be controlled to lowest level as far as possible so as to decrease animal feces moisture for convenience of feces clearing and treatment. At the same time, transportation of pig feces should be arranged properly to prevent falling scattered. In pig farm area sewage ditch and pipeline and sewage tank should be prepared to collect feces sewage from breeding process in pig farm area, and let the sewage flow naturally or pumped to biogas stations treatment facilities for treatment. 8.4 Noise pollution prevention countermeasures and measures Equipment and pumps used for this project are installed in rooms, and all blowers and pumps are equipped with vibration cushion. For some newly-added high-noise equipment, separate workshop is used for enclosure respectively, and noise elimination design is adopted.
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Employees’ domestic garbage will be collected regularly and delivered to local garbage field for sanitary landfill with special transportation vehicles. biogas residue shall conform to following requirement: Appearance: brown or dust color, grainy or powdery, no mechanical impurities, no malodor. Technical indicators: organic matter content 3 0 % , gross nutrient content 4% water content 20% power of hydrogen 5.5 8.0. ascarid egg death rate 95%, coliform value10 1 10 2 Certificate of quality shall be accompanied by each batch of products, including name of enterprise, name of product, batch number, net weight, production date and etc. Organic fertilizer container bag or woven bag shall be underlaid by internal polyethylene container bag, organic fertilizer shall be stored in shady and cool place, moisture, solarization and rupture shall be prevented during transportation. San Jiang Company shall provide related instructions to local farmers who buy biogas residue, such as recommend farmers to store fertilizer in shady and cool place, suggested dosage, as well as cautions of biogas residue. Dosage of biogas residue per hectare shall be 3-6 tons subject to soil condition and variety of crops. For those farmers who seldom use biogas residue, San Jiang Company shall dispatch specific person to carry out survey of agricultural soils and crops, then provide proper recommendations. 8.6 greening measures The evaluation mainly agrees the greening plan contained in feasibility research report of the project, except following suggestions: 1 The greening rate within farm area shall not less than 40%. 2 Choice of tree species: trees with high disease resistance are recommended, such as elm.
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9. Total control 9.1 Selection of total control factor According to national requirements of pollutant total control and character of construction project COD in wastewater and SO2 in exhaust are selected as total control index. 9.2 Calculation of pollutant discharge total control For determination of project pollutant discharge total control index, it must be considered first to meet the following basic conditions: To guarantee up-to-standard emission of pollutants To meet limit value of allowed discharge volume To meet requirements of target total stipulated by local environmental protection administration. Considering local environmental administration has not allocate specific pollutant emission total control index to the farm, the enterprise should make application to local relevant environmental protection administration for pollutant emission total index for convenience of directing production in following days. According to pollution source and pollutant emission statistical analysis in this environmental impact evaluation, on the premise of that pollutant emission and environmental quality reach the standard, the farm’s pollutant emission volume is
Emission of SO2 in exhaust pollutant is 0.2t/a. 9.3 Suggestive index for pollutant emission total control of the planned project
According to this project’s environmental air pollutant emission situations Xinjiang Aksu San Jiang Breeding Co., Ltd should make application to Aksu Prefecture Environmental Protection Administration for pollutant emission total control index in time. Under the designed production scale of this project this environmental impact evaluation, on the principle of pollutant up-to-standard emission principle, suggests pollutant emission total control index of SO20.2t/a for this project.
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10. Public participation 10.1 Purpose of public participation Public participation means to let the public in various social circles in project influencing area understand project construction plan, collect the public’s recognition, attitude and requirements of the project construction, hear or investigate their opinions on environmental impact that may caused by the project and environmental protection measures so as to make the evaluation more practicable the environmental protection measures more feasible and favorable to giving max play to project’s comprehensive and long-term benefits. Effective public participation can more enrich environmental impact evaluation’s contents. Some people are short of normal and professional training, but they have certain understanding of relations among various environmental resources in project area, so public participation is favorable to formulating optimum environmental protection measures, and to gaining social support and cooperation for project construction and operation.
Public participation in this project’s environmental impact evaluation means to make local residents able to in time and accurately understand meaning of project construction and favorable and unfavorable, direct and indirect influence to them by the project construction, and help the enterprise understand their attitudes and major concerns about the construction project find generally accepted solutions to problems proceeding from the public interests so as to guarantee perfection and justice of evaluation and smooth implementation of the construction project and avoid disputes over pollution during project construction and operation. 10.2 Environmental information disclosure mode and contents
This project’s environmental information disclosure mode is realized by adopting modes of public announcement, symposium, interview and questionnaire investigation. 10.2.1 Public announcement
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Construction unit shall make announcement by propaganda column in surroundings of project influence area within 7 days after confirming environmental impact evaluation organization to undertake the evaluation to tell the public name of the project, general description name of construction unit and evaluation unit and contact details, evaluation procedures and main work contents. Mode and place for the public to put forward opinions is through propaganda columns at Group 2 headquarters and Group 8 headquarters of Aksu Experimental Forest Farm. Construction unit, after completion of environmental impact evaluation report, shall give public announcement of the abridged version of the report in the experimental forest farm’s Group 2 and Group 8 headquarters respectively to guarantee local residents to read the report and address questions. At the same time, full-time personnel shall be arranged for to give explanation.
Environmental information announcement is shown as annex to this report.
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10.2.2 Interview Evaluation unit made interview investigations among local residents surrounding the project area on Aug. 12 and 13, 2007 respectively, heard local residents’ attitude s about local environment and construction of the project and kept relevant records on the site. 10.2.3 Symposium Construction unit held a small-sized consultation meeting in San Jiang Company’s office on Aug. 28, 2007 with attendants including local environmental protection administration and environmental protection experts. The experts held positive opinion on the construction and offered several constructive suggestions. 10.2.4 Investigation questionnaire Centering on units under Group 2 and Group 8 of experimental forest farm investigation form for public opinions in evaluation area in random mode and selective mode in order to understand public opinion and requirements of the construction. Finally investigation results are sorted out and summarized. Investigation Form of Public Opinion is shown as Form 10-1.
10.3 Investigation results
10.3.1 Composition of investigation object People for the investigation are mainly from units under Group 2, Group 8 of the experimental forest farm. In terms of personnel composition participants of the investigation have background of different occupations and educational degrees of whom most have degree over senior middle school guaranteeing effectiveness of investigation; in terms of age structure people from various age-range account for certain proportion respectively with the middle-aged and young people as main section, fully reflecting opinions of personnel of different age structure. Age and degree structure of the investigated personnel are shown as Form 10-2, Form 10-3.
Form 10-2 Public Participation Personnel Degree Structure Senior Junior Univer Associat Under Junior Degree Middle Middle Middle Total sity e School School School Number of People 12 32 16 35 10 105 Percentage (%) 11.4 30.6 15.2 33.3 9.5 100
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10.3.2 Feedback opinion statistical 1 Symposium suggestion and analysis Construction unit held a small-sized consultation meeting in San Jiang Company’s office on Aug. 28, 2007 with attendants including local environmental protection administration and environmental protection experts. The experts held positive opinion on the construction and offered several constructive suggestions. Main suggestions are summarized as follows San Jiang Company originally used open-air, non-impervious channel for sewage emission. The influence of the bag smell generated within range of 15m on both sides of the sewage channel is distinctive, causing inconvenience to surrounding residents’ production and life. It is suggested to reconstruction the channel after project construction and use ground-buried sewage discharge pipe to effectively prevent external leakage of bad smell and infiltration of sewage. Dry biogas residue from this project, after shattering, can serve as feed additive and high-efficient organic fertilizer or base material for edible fungus, but it seems that the residue should be test for qualification before ex-farm. This environmental impact evaluation suggests that San Jiang Company should set up lab to check ex-farm dry biogas residue, so as to guarantee the dry residue to be in conformity with Animal and Poultry Breeding Industry’s Pollutant Discharge Standard GB18569 2001 and National Standard of Organic Fertilizer NY525 2002 before ex-farm. 2 Summarization and analysis of investigation questionnaire opinions 84.1% of personnel accepting investigation showed knowledge of the project. In view of their attitude s to the project and investigation statistics most of them hold support attitude , and that construction of the project will play great role in promoting local economic development and will make favorable influence on family life, showing the project is in accordance with wishes of absolutely most people. For statistical results of investigation of attitude to the project, see Form 10-4. 6XUYH\LQJÃ3ODQQLQJÃDQGÃ'HLVJQLQJÃ5HVHDUFKÃ,QVWLWXWHÃRIÃ;LQMLDQJÃ3URGXFWLRQÃÉÃ&RQVWUXFWLRQÃ&RUSVÃ -102-Ã Xinjiang Aksu San Jiang Breeding Co., Ltd CDM Biogas Power Generation Project Environmental Impact Report Form 10-4 Statistical Chart of Investigation Results of Attitude to the Project Survey Promotion of the project construction to local economy Contents Attitude Favorable Uncertain Unfavora Total 1 ble Number of 101 3 1 105 People Percentage (%) 96.2 2.9 0.9 100 Survey The project construction’s influence on family life contents Attitude Favorable Unknown Unfavora Total 2 ble Number of 94 11 0 105 People Percentage (%) 89.5 10.5 0 100 Survey This project construction’s improvement of living contents environment Attitude Favorable Uncertain Unfavora Total 3 ble Number of 82 22 1 105 People Percentage (%) 78.1 21 0.9 100 Survey Attitude to the project construction contents Attitude Support Be Object total 4 indifferent Number of 105 0 0 105 People Percentage (%) 100 0 0 100 Statistical results of investigation of environmental present situation are shown in Form 10-5. The public’s answer to current “environmental situation” at present leans to “satisfaction” with proportion up to 82.9%. Answers to “main environmental problems at present in local area” mostly center on “air pollution and water pollution”, showing local residents’ concern on surrounding environment and high requirements of personal life quality.
Form 10-5 Statistical Results of Investigation of Environmental Situations and Problems at Present
Attitude to present situation of Dissatisfact Satisfaction Uncertain Total environmental quality ion Number of people 87 10 8 105 Percentage % 82.9 9.5 7.6 100 When answering the project’s influence on various factors of natural
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Form 10-6 Statistical Results of Investigation of the Project Construction’s Influence on Environmental Quality
Unfavora Favorable No Item Uncertain ble Total Influence Influence Influence Number of 56 22 23 4 105 people Air quality Percentage 53.3 21 21.9 3.8 100 (%) Number of Water 52 22 25 6 105 people environment Percentage quality 49.5 21 23.8 5.6 100 (%) Number of Sound 42 40 18 5 105 people environment Percentage quality 40 38.3 17.1 47.6 100 (%) Ecological Number of 48 33 17 7 105 environment people
6XUYH\LQJÃ3ODQQLQJÃDQGÃ'HLVJQLQJÃ5HVHDUFKÃ,QVWLWXWHÃRIÃ;LQMLDQJÃ3URGXFWLRQÃÉÃ&RQVWUXFWLRQÃ&RUSVÃ -104-Ã Xinjiang Aksu San Jiang Breeding Co., Ltd CDM Biogas Power Generation Project Environmental Impact Report Percentage 45.7 31.4 16.2 6.7 100 (%) In addition, this evaluation also collects and make statistics of public opinions in investigation questionnaire which area mainly summarized as follows 74.3% of the public put forward the problem of bad smell influence from San Jiang Breeding Farm’s sewage discharge pipe and wished this project construction can reduce bad smell influence on surrounding environment. 85.1% of the public expressed their ideas to use biogas slurry and dry biogas residue for their orchard and cotton field from the project after completion.
10.3.3 Answer to the public opinions This investigation of public participation shows that the public’s opinions mainly focus on bad smell influence of existing sewage discharge pipe of San Jiang Company and biogas slurry and biogas residue treatment after project completion. This evaluation will adopt public opinions to reconstruct San Jiang Company Breeding Farm’ discharge pipe and lay ground-buried discharge pipe, so as to reduce bad smell’s influence and sewage infiltration’s influence on groundwater. For treatment of biogas slurry and biogas residue, this evaluation suggests that San Jiang Company should set up lab to check ex-farm dry biogas residue, so as to guarantee the dry residue to be in conformity with Animal and Poultry Breeding Industry’s Pollutant Discharge Standard GB18569 2001 and National Standard of Organic Fertilizer NY525 2002 before ex-farm. The public’s requirements of using biogas slurry and biogas residue for irrigation of orchard and cotton field can be coordinated with construction unit, and are not involved in this evaluation. 10.4 Conclusion of public participation investigation According to investigation statistics, most of the personnel participating in this investigation held support attitude, and put forward very specific problems which serves as an important basis for this evaluation. The public generally put forward that environmental protection work must be done well in project construction and should not influence normal life of surrounding residents; treatment measures should be implemented in a down-to-earth way to realize up-to-standard emission of pollutant, so as to reduce pollution to surrounding environment to max extent and highlight the project’s environmental protection benefits. 6XUYH\LQJÃ3ODQQLQJÃDQGÃ'HLVJQLQJÃ5HVHDUFKÃ,QVWLWXWHÃRIÃ;LQMLDQJÃ3URGXFWLRQÃÉÃ&RQVWUXFWLRQÃ&RUSVÃ -105-Ã Xinjiang Aksu San Jiang Breeding Co., Ltd CDM Biogas Power Generation Project Environmental Impact Report
11 Environmental protection investment and analysis of environmental and economic gains and losses 11.1Environmental protection investment Environmental protection investment is an investment in capital construction works related to treatment and prevention of pollution. It includes both expenses for facilities for treatment of pollution and protection of environment and services needed for production and for treatment of pollution, but main purpose of the investment is for facilities to improve environmental quality. This project’s environmental protection investment covers expenses for exhaust treatment and sewage treatment facilities, solid waste disposal, noise pollution prevention, greening and risk prevention, etc.
This project’s gross investment is about 31.6 million yuan of which investment in environmental protection facilities is 1.52 million yuan accounting for 4.8% of the gross investment. 11.1.2 Analysis of environmental protection investment benefit
Breeding industry production belongs to circular-economic project, positive environmental influence after the operation is higher relatively, which has been commented in details in the environmental impact forecast evaluation. Pollution loss value has potential loss value as main section contains more factors and is hard to be estimated in complete quantization manner so this environmental impact evaluation takes environmental gains and losses of the pollution prevention measures taken as key for analysis and commentary. Pollution control measures’ economic gains and losses include two aspects the first is direct economic benefit, the second is indirect economic benefit. Direct economic benefit means products value (namely internal benefits) provided directly by environmental protection measures and indirect economic benefit means pollution- caused loss expenses that can be cut down after pollutant treatment(namely external benefit). Indirect economic benefit and loss are two aspects of one issue between
6XUYH\LQJÃ3ODQQLQJÃDQGÃ'HLVJQLQJÃ5HVHDUFKÃ,QVWLWXWHÃRIÃ;LQMLDQJÃ3URGXFWLRQÃÉÃ&RQVWUXFWLRQÃ&RUSVÃ -106-Ã Xinjiang Aksu San Jiang Breeding Co., Ltd CDM Biogas Power Generation Project Environmental Impact Report which interchangeable relations exist namely loss value due to poorer pollution area’s service function caused by environmental pollution can serve as interests gained from reducing pollution. This project will utilize feces and wastewater of live pig in stock to generate biogas, which will be used for industrialized biogas power generation of the company and for the company’s production and life-use energy. Biogas residue, after sun-drying and shatter, will serve as organic solid fertilizer and feed additive, and biogas slurry will be transmitted through pipeline to neighboring fruits and vegetable field for sprinkling irrigation, infiltration irrigation and drip irrigation. The whole project is an “ecological and environmental protection project changing the waste into the valuable and of comprehensive utilization of resources” being of important driving and demonstration significance in developing animal and poultry industry in West China and fueling organic agro-industry development and making certain contributions to controlling greenhouse gases emission, protecting earth climate conditions and improving company environment.
As the above-mentioned here indirect economic benefit means environmental economic loss reduced by avoiding or relieving environmental impact through taking pollution prevention measures. According to interchangeable relations between indirect economic benefit and loss, environmental impact evaluation adopts pollution loss value to back-derive interests gained due to reduction of pollution for analysis of environmental and economic gains and losses. In view of geographical position the project’s farm site is located at Aksu River basin. If the project is not designed with treatment system, random emission will cause degradation of surface water and groundwater quality directly influencing life of people in project area. Therefore no treatment of the “three wastes” from the project will cause great economic loss explaining the pollution treatment works’ great indirect benefit inversely.
6XUYH\LQJÃ3ODQQLQJÃDQGÃ'HLVJQLQJÃ5HVHDUFKÃ,QVWLWXWHÃRIÃ;LQMLDQJÃ3URGXFWLRQÃÉÃ&RQVWUXFWLRQÃ&RUSVÃ -107-Ã Xinjiang Aksu San Jiang Breeding Co., Ltd CDM Biogas Power Generation Project Environmental Impact Report 11.2 Analysis of environment and economic gain and loss 11.2.1 Social benefit analysis This project’s social benefits are mainly in the following aspects To give play to resources advantages to enhance local economy Doing well job of industrial and economic structure adjustment is of very important significance to local economic development. This project is designed to improve products’ added value through further deep processing of products, intensifying resources utilizations. Through advanced management mode and solid funds input the project can give better play to resources advantages in the area. This project is in conformity with China’s situations and national policy of relevant industry, and conforms to Xinjiang’s situation and pace quickening industrial structure adjustment and urgent requirements to transform resources advantages into products economic for development of economic construction. To increase jobs and improve residents Xinjiang is a region where many ethnic groups live in compact community stability and unity and full employment are Xinjiang’s top task. Implementation of this project can create jobs to local people, solving the problems of employment of local labor force to certain extent. 11.2.2 Economic benefit analysis In this project investment in all environmental protection works totals about 1.52 million yuan accounting for 4.8% of the gross investment in the project. Environmental protection works mainly gain environmental benefit, and make no direct economic benefit basically, and main environmental problems are also reflected in improper environmental protection facilities and irregular operation. Therefore, the project’s indirect benefit is embodied from reduction of emission of various pollutants and occurrence of risk accident.
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12 Environmental management and environmental monitoring plan
Environmental management is one of important contents of environmental protection and an important component of business management. It takes advantages of administrative, economic, technical, legal and training means to coordinate relations of enterprise production, operation, development and environmental protection and introduce them into enterprise’s agenda give deep and careful research of environmental problems that has happened or may happen in production process formulate reasonable pollution treatment plan, with a view to realizing the purpose of developing production, improving economic benefit and protecting environment.
Main contents of environmental management include: supervision and check of implementation and execution of environmental protection measure responsibility for organization and implementation of environment monitoring and sorting out and submit to higher authority of monitoring data.
Formulation and execution of environmental monitoring plan is basis and foundation of environmental management, provides scientific basis for environmental statistics and quantitative evaluation of environment, can guarantee implementation of various pollution prevention measures, find problem occurred in environmental protection measures in time for correction and improvement. So only by establishing corresponding environment management plan and monitoring plan can the enterprise guarantee normal operation of enterprise pollution treatment facilities and up-to- standard sewage discharge prevent risk accident, reduce accident loss and make construction project’s influence on environment controlled in min range.
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12.1 Environmental management 12.1.1 Environmental management system
This project’s environmental management system consists of management organization and supervision organization. Environmental management system is shown as Fig. 12 1.
HQYLURQPHQWDOPDQDJHPHQWRUJDQL]DWLRQ HQYLURQPHQWDOVXSHUYLVLRQRUJDQL]DWLRQ 6DQ-LDQJ&RPSDQ\ $NVX3UHIHFWXUH(QYLURQPHQWDO3URWHFWLRQ $GPLQLVWUDWLRQ (QYLURQPHQWDO3URWHFWLRQ'HSDUWPHQW PRQLWRULQJVWDWLRQ SURGXFWLRQGHSDUWPHQW VXSHUYLVLRQGHSDUWPHQW (QYLURQPHQWDOPDQDJHPHQWRUJDQL]DWLRQ In the principle of “simplification and high efficiency”, management organization will be established in form of enterprise. This project’s construction unit San Jiang Company will organize and establish environmental protection department and practice farm director responsibility system with the director holding the position of head of the department concurrently. The environmental protection department will have 1 2 personnel except for the director and all department personnel are required to be full time and have professional knowledge and work experience in environmental protection
6XUYH\LQJÃ3ODQQLQJÃDQGÃ'HLVJQLQJÃ5HVHDUFKÃ,QVWLWXWHÃRIÃ;LQMLDQJÃ3URGXFWLRQÃÉÃ&RQVWUXFWLRQÃ&RUSVÃ -110-Ã Xinjiang Aksu San Jiang Breeding Co., Ltd CDM Biogas Power Generation Project Environmental Impact Report to be responsible for daily works of environmental protection department, which is mainly responsible for 1 Implementation and execution of various national and local principles and policies of and regulations on environmental protection, formulation strict technical specifications and operation rules and environmental protection system and rules 2 Environmental management during the project construction period and operation period, establishment and perfection of the farm’s environmental protection and equipment maintenance system and regular check of equipment operation to stop occurrence of accident 3 Statistics and records of lab’s monitoring and test data of biogas slurry and report of the data to San Jiang Company for it to submit the data to local higher environmental protection administration with a view to guaranteeing pollutant up-to- standard emission 4 Treatment of pollution emission accident 5 Preparation of environmental protection training plan for company employees, organizing the employees to have trainings of environmental protection. The company’s employees come from two sections of production department and environmental supervision department, which are under system of leadership of farm director and personnel responsibility to higher officer. All company employees should participate in environmental protection training and shall not be allowed to work before becoming qualified through training. Scope of work, responsibility and authority of all levels, departments, production units and various personnel and environmental protection works in the farm should be clarified. Main responsibilities of employees at various levels 1 Production department controls first-hand data of project production and should report abnormal situation in project production process to higher department in time so as to control pollution accident and control in embryonic stage 2 San Jiang Company lab is major supervision department. Lab should report lab results as truth is and regularly report lab data to environmental protection department. 2. Environment supervision organization Aksu Prefecture Environmental Protection Administration is responsible for implementation, supervision and management of project environmental protection, organization and coordination of relevant organization for serving environmental
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To seriously implement and execute national environmental protection policy and regulations, improve the farm’s environmental protection management level To formulate environmental protection position target responsibility system, and include environmental management into production management system; combine environmental protection appraisal and economic benefit appraisal together to establish strict rewards and punishments mechanism To enhance publicity and training of environmental protection and practice position training to make all employees able to understand important meaning of environmental protection including relations to enterprise production, survival and development. The whole company should develop a sense of responsibility to implement environmental protection work in a down-to-earth way and make responsibility specific to every employee
To enhance statistics and analysis of environmental monitoring data establish perfect pollution source record in the farm and strictly control pollutant emission total to guarantee pollutant emission index to meet design requirements To intensify supervision and management of environmental protection facilities operation, establish perfect technical records of environmental protection facilities operation, repair and maintenance, etc, enhance technical training of environmental protection facilities operators to guarantee environmental protection facilities at normal operation state and up-to-standard pollutant emission.
This project’s environmental management plan is shown as Form 12-1.
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Form 12-1 Project’s Environmental Management Plan Environmental Management Measures Implementati Problem on organization Constructio A n period · To take reasonable measures, including spraying water on construction site to reduce construction’s TSP pollution to surrounding atmosphere, Dust, air particularly area near residents. 1 pollution ·Truck delivering building materials must be covered with canvas to reduce leakage. ·Mixing equipment must be closed tightly and equipped with dust removing device. ·To protect construction worker from noise San Jiang disoperation; workers near strong noise source Company must wear earplug and helmet and working time must be limited. ·To strictly execute Construction Boundary 2 Noise Noise Limited Value to guarantee noisy construction work not to be carried out during nighttime with a view to preventing disturbance to residential communities. ·To enhance maintenance of machinery and vehicles to keep lower noise level of them. Operation B period Water To enhance management to guarantee normal San Jiang quality operation of sewage treatment. Company pollution To be executed according to technical Aksu Environmen specifications of environment monitoring and Prefecture C tal monitoring standard and method issued by Environmenta monitoring State Environmental Protection l Monitoring Administration. Station (6) Management planning arrangement schedule: mainly include project construction period and operating period, before start-up of the project, San Jiang
Company shall establish intra-farm area environment protection department and personnel appointment. During project construction period, implementation of relevant
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Environmental monitoring is the main guarantee for enterprise to do well job of environmental management and promote normal operation of pollution treatment facilities. By understanding environmental quality situation of neighboring area through regular environmental monitoring, problem can be found and solved in time, thus to be favorable to supervising implementation of environmental protection measures and adjusting environmental protection plan at due time according to monitoring results. 12.2.2 Organization of environmental monitoring
It is suggested to entrust Aksu Prefecture Environmental Monitoring Station with undertaking environmental monitoring during project construction period and operation period while routine monitoring of daily production should be under responsibility of the company’s analysis lab. 12.2.3 Monitoring plan
According to forecast and analysis of the project’s environmental impact, monitoring items including environmental air TSP and construction noise during construction period, and environmental air NH3, H2S , water environment pH,
6+ CODcr, SS, BOD5, DO, LAS, Cr , oils, phosphate, ammonia nitrogen, sulfide, total bacteria, coliform group and noise farm boundary, pump room during operation period.
Ex-works biogas residue shall conform to “Organic Fertilizer Standard”
(1< ) to carry out inspection, namely, it shall conform to following requirements: organic matter content 30%, gross nutrient content 4 % water content
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20% power of hydrogen 5.5 8.0, ascarid egg death rate 95% coliform value10 1 10 2.
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This project’s monitoring plan is shown as following form.
Form 12 2 Environmental Air Monitoring Plan Monitoring Monitoring Monitoring Monitoring Sampling Implementation Supervision Stage place item frequency time time organization organization Arrange a point each at downwind Construction Random direction TSP 1 day period inspection of farm Aksu Aksu boundary Prefecture Prefecture dominating Environmental Environmental wind Monitoring Protection Place 10m Once a Station Administration from main quarter Two Operation farm 4 4 times a NH , H S consecutive period building 3 2 times/year day days and at farm random boundary inspection
Form 12 3 Noise Monitoring Plan Monitoring Monitoring Monitoring Monitoring Sampling Implementation Supervision Stage place item frequency time time organization organization 2 Each at Construction Construction times/year daytime Noise 1 day Aksu Aksu period site random and Prefecture Prefecture inspection nighttime Environmental Environmental Each at Place 1 m Monitoring Protection Operation daytime from farm Noise 2times/year 1 day Station Administration period and boundary nighttime
Form 12 4 Water Environmental Monitoring Plan Monitoring Monitoring Implementation Supervision Stage Monitoring item place frequency organization organization Operation Master pH, SS, CODcr once a day period discharge DO, BOD5, outlet ammonia nitrogen, Once a week Company San Jiang total bacteria, lab Company coliform group LAS, Cr6+, oils, Once a phosphate, sulfide month
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This project’s training plan should include project construction-period training and operation-period training.
Construction-period training is mainly for construction personnel, and should be organized by San Jiang Company or Aksu Prefecture Environmental Protection
Administration before commencement of project.
Operation-period training consists of up-to-standard training and long-term study training. After the project is completed and put into operation Environmental
Protection Department of San Jiang Company should carry out centralized training of staff member of the farm. Upon end of training, test should be made to guarantee only personnel who successfully pass the test can obtained qualification for position. Long- term study training shall be arranged by Environmental Protection Department of San
Jiang Company by twice a year as required. Courses can be prepared by Environmental
Protection Department.
12.3.2Estimation of expenses
Including environmental protection training expense and environmental monitoring expense; Environmental protection training expense for construction period is 2000 yuan as plan long-term study training can be practiced in the farm of San Jiang
Company, with 3000 yuan/a for study information and operation and 5000 yuan/a for environmental monitoring.
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13 Evaluation conclusion and suggestions 13.1 General situation of project The project construction scale is designed to use feces and wastewater from about 70630 head of live pig in stock per year of Xinjiang Aksu San Jiang Breeding Co., Ltd to generate biogas. It is planned to adopt six sets of domestic good-performance improved 1000m3 USR anaerobic reactors to annually produce biogas of 4.1455 million m3. Biogas will be used for the company’s industrialized biogas power generation and energy for the company’s production and life, with annual output of biogas slurry of 148,300 t. Solid biogas residue, through solid-liquid separation, sun drying and shattering, can make 7154 t dry biogas residue per year to serve as organic solid fertilizer and feed additive liquid biogas slurry after solid-liquid separation can be pipeline transmitted to neighboring 8400-mu fruits and vegetables field for sprinkling irrigation, infiltration irrigation and drip irrigation. The whole project is an “ecological and environmental protection project changing the waste into the valuable and of comprehensive utilization of resources” being of important driving and demonstration significance in developing animal and poultry industry in West China and fueling organic agro-industry development and making great contributions to controlling greenhouse gases emission, protecting earth climate conditions and improving company environment. 13.2 Influence on environmental air
In evaluation SO2 and NO2 daily average concentrations do not exceed standard the certain environmental capacity remains. But TSP daily average concentration meets over-standard case in monitoring day. TSP over-standard is mainly related to higher TSP content in air from floating dust in south Xinjiang.
Forecast shows that during project operation period pollutant index of all items do not exceed standard making less influence on local environmental air.
Generation of bad smell can be minimized by adopting advanced fermentation and thoroughly-decomposed process and close fermentation equipment and proceeding from
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The area’s groundwater quality can meet requirements of Class III in Groundwater
Quality Standard (GB/T14848—1993).
This project water pollutant volume is high and water quality is complicated. After treatment up-to-standard discharge can be realized. Forecast and analysis of water environment show drainage from this project will not make distinctive influence on environment in project area and surrounding areas. In pig farm, flushing water consumption should be controlled to lowest level as far as possible so as to decrease animal feces moisture for convenience of feces clearing and treatment. At the same time, transportation of pig feces should be arranged properly to prevent falling scattered. In pig farm area sewage ditch and pipeline and sewage tank should be prepared to collect feces sewage from breeding process in pig farm area, and let the sewage flow naturally or pumped to biogas stations treatment facilities for treatment. 13.4 Sound environmental impact Noise present situation in farm site area meet requirements of Class II in Industrial
Enterprise Boundary Noise Standard GB12348—90 , and sound environmental quality is good . The planned project’s noise source makes very little contribution to farm boundary noise surrounding sound environmental quality will remain existing level.
Equipment and pumps used for this project are installed in rooms, and all blowers and pumps are equipped with vibration cushion. For newly-added some high-noise equipment, separate workshop is used for enclosure respectively, and dampening design is used. 13.5 Environmental risk The project design gives thoughtful consideration to prevention of risk in farm area, has good target orientation and workability. As long as efforts are made in real
6XUYH\LQJÃ3ODQQLQJÃDQGÃ'HLVJQLQJÃ5HVHDUFKÃ,QVWLWXWHÃRIÃ;LQMLDQJÃ3URGXFWLRQÃÉÃ&RQVWUXFWLRQÃ&RUSVÃ -119-Ã Xinjiang Aksu San Jiang Breeding Co., Ltd CDM Biogas Power Generation Project Environmental Impact Report earnest during construction and operation process to implement and strictly execute various risk prevention measures, enhance training of working personnel to improve operators’ quality and risk emergency treatment ability the project’s environmental risk can be minimized. 13.6 Total control Considering the project’s designed production scale and pollutant up-to-standard emission this environmental impact evaluation, on pollutant up-to-standard emission principle, suggestions the project’s pollutant emission total control index of SO2 0.2t/a. 13.7 Public participation Most of the public hold positive opinion of the project’s construction and we will do our best to solve problems that a few people concern about. 13.8 General evaluation conclusion and suggestions After this project is completed and put into production wastes comprehensive utilization will transform pollutant into economic advantages and products advantages favorable to Aksu City’s economic growth. At the same time, through adopting a series of environmental protection measures, atmospheric pollutant emission volume can be minimized. In addition, this project can also promote vigorous growth of
Xinjiang’s breeding industry, making great contributions to social stability and solving
“agriculture, rural areas and farmers” problem. This project boasts very good environmental benefit and social benefit and basically reasonable farm area layout. Main environmental protection measures adopted in this project are advanced up-to-standard emission of pollutant can be realized, production process is advanced and overall clean level is higher. Through adopting various environmental protection measures mentioned in report, influences of items can be reduced to extent allowable to local environment and will not make obvious influences on surrounding environment and change of environmental quality and function. To sum up this evaluation holds that implementation of this project is feasible at the angle of environmental protection and on premise of taking effective safety
prevention measures to prevent environmental risk seriously implementing
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environmental protection measures put forward in chapters of this evaluation and meeting local total control requirements. 13.9 Suggestions To enhance management of environmental protection facilities, establish technical records or database of environmental protection facilities constantly summarize experience and improve management level step by step to strive for implementation and execution of ISO-14000 environmental protection quality management system as early as possible in the enterprise and really realize integration of social, environmental and economic benefits
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