Dow Chemical International Private Limited Query Reply Reply to Additional Details Sought vide Lr.No.SEIAA-TN/F.No.6439/2017 dated: 01.09.2017
Sl.No. Query Reply 1. In the prefeasibility report no.7, table 3.2 for the list of Our products are made in raw materials the quantity furnished in (MT/Day) for batches and we had considered Existing and Proposed does not match with the annual 340 working days for our input of raw material and request to clarify on the capacity calculations. Please same. note that we will not exceed the mentioned annual capacities as our demand will be within the same.
2. Details of the fuel used for boiler with details of fuel Fuel Used in the boiler: Furnace quantity required, supplier information, method of oil storage inside the premises. Supplier Source: Indian Oil Corporation Limited Annual Fuel Qty Required: A) Existing: - 272.4 Kl B) Future: 476.7 Kl Storage: 45 kl MS storage tank with Heating coil as approved by PESO. 3. Consent for establishment was obtained from Tamil The Industry was Established by Nadu Pollution ControlBoard under the provisions of ROHM & HAAS India Pvt. Ltd. the Water (Prevention and Control of Pollution) which was later merged with Act, 1974 and the Air (Prevention and Control of Dow Chemical International Pollution) Act, 1981 Pvt. Ltd. The court order videProc.No.T12/TNPCB/F18146/KPM/06 dated regarding Merger is given in 05.08.2006 in the name of M/s.RDHM and HARS (India) Annexure-II, of PFR. Hence, the Private Limited. But, now the Project Proponent application is submitted in the isapplied for Term of References (ToR) in the name of name of Dow Chemical M/s. The Dow ChemicalInternational Private Limited, International Private Limited. request to clarify on the same. Also the Current Renewal Consent orders are in the name of Dow Chemical International Private Limited. 4. Consent for establishment was obtained from Tamil The Industry was Established Nadu Pollution Control Board under the provisions of after obtaining CTE from TNPCB the Water (Prevention and Control of Pollution)Act, before EIA Notification dated 1974 and the Air (Prevention and Control of Pollution) 14th September 2006. Hence, Act, 1981 vide Proc.No.T12/TNPCB/F18146/KPM/06 no Environmental Clearance dated 05.08.2006. Whether theproponent has obtained was obtained. Environment clearances for the existing facilities. Ifso, furnish the details. 5. Photo showing existing boiler of capacity 2 T/hr along Photograph of Boiler with air with the Air Pollution control measures provided. pollution control measures Enclosed as Annexure I. 6. List of raw material required for production of existing Enclosed as Annexure-II and proposed expansion project (for each product) indicating the source of supply and its capacity utilization in the process shall be furnished. Dow Chemical International Private Limited Query Reply 7. Permission obtained from SIPCOT for 236 KLD fresh The permission from SIPCOT water supply for proposed expansion activity. for Supply of 350 KLD of water is enclosed as Annexure III. 8. Water balances furnished in the prefeasibility report The revised table is enclosed as does not match with the Table 3.5. Hence request to Annexure IV. revise the same. 9. Consent to operate and Renewal of consent order The Consent to Operate, obtained from Tamil Nadu Pollution Control Board Renewal orders is Enclosed as under the provisions of the Water (Prevention and Annexure V. Control of Pollution) Act, 1974 and the Air (Prevention and Control of Pollution) Act, 1981. 10. ln the prefeasibility report it was stated that the The adequacy report of current current effluent treatment plant system is sufficient Effluent Treatment plant to enough to handle the expansion activities. Hence, handle the expansion activity is the project proponent is requested to furnish the enclosed as Annexure VI. capacity of the effluent treatment plant and adequacy report of the same. 11. Details of the quantity of trade effluent generated in The quantity of Trade Effluent the each process. Generated is given in Annexure IV. 12. Authorization obtained under Hazardous and Other Authorization obtained under Wastes (Management and Transboundary Movement) Hazardous and Other Wastes Rules, 2016 Details of Air pollution control measures ( Management and provided for boiler and polymer plant. Transboundary Movement) is Enclosed as Annexure VII. 13. Technical specification of Air pollution control Boiler has been provided with measures (design details) for boiler to control process stack of 45m, to control Air emission. Pollution. 14. Material balance for the process activity shall be Material Balance is given in furnished separately for the existing and the proposed Page Nos. 9 -12 of Prefeasibility expansion project for each product. Report. 15. Affidavit stating that there is no violation of EIA Affidavit is Enclosed as Notification-2006 Annexure VIII. 16. Affidavit stating that there is no court case pending before any court of law. 17. Details on material balance of raw material, products Given in page 11 &12 of PFR. and waste generated for existing and proposed expansion activity. 18. Report on Noise Level Survey and Ambient Air Quality Enclosed as Annexure IX. Survey conducted by the industry from the year 2007- 2017 for the existing activity. 19. Details of sludge collected and disposed in existing Details provided in PFR page activity. No.21. 20. Plan for implementation of scheme on occupational i. Employees and contractors health of the workers shall be furnished. working in plant premises (eg Operators, shift incharges)
Yearly two times medical check up.
ii.Employees and contractors Dow Chemical International Private Limited Query Reply working in office environment ( eg Executives, Managers, office assistants)
Yearly once medical check up. 21. Details of industries/ habitation/ schools/ hospital etc. Industries Located within 5 Km radius around the project site shall Saint Gobain be furnished. Asian Paints Hinduja Foundry Craftsman Automation Pvt. Ltd. Prax Air. DELL Samsung Foxconn Yamaha India Habitations Araneri Pondhur Mambakkam Sunguvarchatram Sriperumbudur Vallam Vadagal St. Teresa Nagar Pallnalloor Village Karumangazhani Village
Schools & Hospitals are located in the Habitats and majorly in Sriperumbudur Town.
22. Location of national parks/ Wildlife sanctuary/ reserve No, national parks/ Wildlife forests within 5 Km radius around the project site shall sanctuary/ reserve forests are be furnished. located within 5km radius of Plant. 23. Details of proposed layout clearly demarcating various Layout demarcating proposed units of the existing plant and proposed expansion expansion activity is enclosed project. as Annexure-X. 24. The Project proponent has to furnish the Survey No. Plot No. L7, SIPCOT Industrial pertaining to the existing and proposed expansion Park at Sriperumpudur. project. Survey Nos. (i) Pondur ‘A’ Village: 20PT,21PT,22PT,23PT& 24PT. (ii) Araneri Village: 73PT,74PT,76PT & 77PT 25. Details of Sale deed /lease deed documents obtained Lease Deed is Enclosed as from the SIPCOT. Annexure-XI. 26. Permission or NOC obtained for classification as The land is leased from SIPCOT. industrial area from the competent Authority.
Annexure I
Photograph of Boiler
Annexure II
Raw Material With Source Dow Chemical International Private Limited Query Reply –Annexure II
Raw Material required for Production
Quantity - MT/day
Source of Capacity Category Product Raw Material Existing Proposed supply Utilization Remarks
Styrene 12 21 India ~ 70% Styrene Butyl Acralate 8.4 14.7 Saudi Acrylic & VAM Addtiives 1.4 2.45 India Acrylic Water 51 89.25 Local Emulsions There are A VAM 3 5.25 India number of products each category Methyl which is based methacralate 5.5 9.625 Saudi ~ 25%- 30% on customer Pure Butyl Acralate 3.6 6.3 Saudi needs acrylic /Application Addtiives 0.55 0.9625 India/US emulsion requirements. The Water 23 40.25 Local composition of B 2 EHA 5 8.75 India/US raw material will vary
accordingly Ethyl acralate 1.7 2.975 Saudi ~ 0%-5%
Special AN 1 1.75 India Acrylics Addtiives 0.05 0.0875 India
D Water 3 5.25 Local
Annexure III
SIPCOT Water Supply Agreement
Annexure IV
Water Balance Table
Dow Chemical International Private Limited Query Reply –Annexure -III
Water Balance- Table
WATER REQUIREMENT (KLD) S. PARTICULARS AFTER NO. EXISTING EXPANSION 1 Process 77 218 2 Cleaning & Vessel Washing 79 105 3 Cooling 64 112 4 Domestic 10 16 ACTUAL REQUIREMENT 235 451
FRESH WATER REQUIREMENT 114 236 COMBINED TREATED EFFLUENT I 101 173.5 (ETP WITH RO) COMBINED TREATED EFFLUENT II 20 41.5 (MEE CONDENSATE)
TOTAL WATER REQUIREMENT 235 451
Dow Chemical International Private Limited Query Reply –Annexure -III
Annexure V
Consent to Operate, Renewal order
TAMIL NADU POLLUTION CONTROL BOARD
CONSENT ORDER NO. 170828211535 DATED: 31/08/2017.
PROCEEDINGS NO.T2/TNPCB/F.0807SPR/RL/SPR/A/2017 DATED: 31/08/2017
______
SUB: Tamil Nadu Pollution Control Board - RENEWAL OF CONSENT –M/s. DOW CHEMICAL INTERNATIONAL PRIVATE LIMITED , S.F.No. Plot No. L7, SIPCOT industrial Park, Phase II, PONTHUR A B C BLOCK village, Sriperumbudur Taluk and Kancheepuram District - Renewal of Consent for the operation of the plant and discharge of emissions under Section 21 of the Air (Prevention and Control of Pollution) Act, 1981 as amended in 1987 (Central Act 14 of 1981) –Issued- Reg.
REF: 1. Proceedings No.: T12/TNPCB/F.0807SPR/RL/SPR/W&A/2016 Dated: 03/08/2016 2. IR.No : F.0807SPR/RL/AEE/SPR/2017 dated 28/07/2017
RENEWAL OF CONSENT is hereby granted under Section 21 of the Air (Prevention and Control of Pollution) Act, 1981 as amended in 1987 (Central Act 14 of 1981) (hereinafter referred to as “The Act”) and the rules and orders made there under to
The Director M/s.DOW CHEMICAL INTERNATIONAL PRIVATE LIMITED, S.F.No. Plot No. L7, SIPCOT industrial Park, Phase II, PONTHUR A B C BLOCK village, Sriperumbudur Taluk, Kancheepuram District.
Authorizing the occupier to operate the industrial plant in the Air Pollution Control Area as notified by the Government and to make discharge of emission from the stacks/chimneys. This is subject to the provisions of the Act, the rules and the orders made there under and the terms and conditions incorporated under the Special and General conditions stipulated in the Consent Order issued earlier and subject to the special conditions annexed.
This RENEWAL OF CONSENT is valid for the period ending March 31, 2019
For Member Secretary, Tamil Nadu Pollution Control Board, Chennai
1 SPECIAL CONDITIONS
1. This renewal of consent is valid for operating the facility for the manufacture of products (Col. 2) at the rate (Col. 3) mentioned below. Any change in the products and its quantity has to be brought to the notice of the Board and fresh consent has to be obtained. Sl. Description Quantity Unit No. Product Details 1. Water Based Latex polymer 40000 MT/Year 2. Latex Polymer Cake 407 MT/Year 2. This renewal of consent is valid for operating the facility with the below mentioned emission/noise sources along with the control measures and/or stack. Any change in the emission source/control measures/change in stack height has to be brought to the notice of the Board and fresh consent/Amendment has to be obtained. I Point source emission with stack : Stack Point Emission Source Air pollution Stack height Gaseous Discharge No. Control measures from Ground in Nm3/hr Level in m 1 Stack Attached to Polymer Wet scrubber with 35 Plant stack 2 Stack Attached to Boiler 2 Stack 45 2090 tons/hr capacity 3 Stack Attached to DG Set Stack 16 850 320KVA 4 Stack Attached to DG Set Stack 16 1090 500 KVA II Fugitive/Noise emission : Sl. Fugitive or Noise Emission Type of emission Control No. sources measures 1. Diesel Generator Area Noise Acoustic Enclosure
2 Additional Conditions: 1. The unit shall operate and maintain the Air Pollution Control measures provided efficiently and continuously so as to satisfy the National Ambient Air Quality /Emission standards prescribed by the Board. 2. The unit shall adhere to the ANL standards prescribed by the Board. 3. The Unit shall maintain and operate the continuous ambient VOC analyser at the process area and ensure the connectivity with care air centre of TNPCB and provide proper data at all times. 4. The unit shall maintain the VOC analyser provided at the process stack , online sensors and provide proper data to care air centre of TNPCB at all times. 5. The unit shall develop and maintain adequate greenbelt within the unit premises. 6. In case of revision of consent fee by the Government, the unit shall remit the difference in amount within one month from the date of notification. Failing to remit the consent fee, this consent order will be withdrawn without any notice and further action will be initiated against the unit as per law.
For Member Secretary, Tamil Nadu Pollution Control Board, Chennai
To The Director, M/s.DOW CHEMICAL INTERNATIONAL PRIVATE LIMITED, Plot No L7, SIPCOT Industrial Park,Phase II, Pondur and Araneri Village, Sriperumbudur Taluk, Kancheepuram District, Pin: 602106
Copy to: 1.The Commissioner, SRIPERUMBUDUR-Panchayat Union, Sriperumbudur Taluk, Kancheepuram District . 2. The District Environmental Engineer, Tamil Nadu Pollution Control Board, SRIPERUMBUDUR. 3. The JCEE-Monitoring, Tamil Nadu Pollution Control Board, Chennai. 4. File ------
** This consent order is computer generated by OCMMS of TNPCB and no signature is needed**
3
TAMIL NADU POLLUTION CONTROL BOARD
CONSENT ORDER NO. 170818211535 DATED: 31/08/2017.
PROCEEDINGS NO.T2/TNPCB/F.0807SPR/RL/SPR/W/2017 DATED: 31/08/2017
______
SUB: Tamil Nadu Pollution Control Board - RENEWAL OF CONSENT – M/s. DOW CHEMICAL INTERNATIONAL PRIVATE LIMITED , S.F.No. Plot No. L7, SIPCOT industrial Park, Phase II, PONTHUR A B C BLOCK village, Sriperumbudur Taluk and Kancheepuram District - Renewal of Consent for the operation of the plant and discharge of sewage and/or trade effluent under Section 25 of the Water (Prevention and Control of Pollution) Act, 1974 as amended in 1988 (Central Act 6 of 1974) – Issued- Reg.
REF: 1. Proceedings No.: T12/TNPCB/F.0807SPR/RL/SPR/W&A/2016 Dated: 03/08/2016 2. IR.No : F.0807SPR/RL/AEE/SPR/2017 dated 28/07/2017
RENEWAL OF CONSENT is hereby granted under Section 25 of the Water (Prevention and Control of Pollution) Act, 1974 as amended in 1988 (Central Act, 6 of 1974) (hereinafter referred to as “The Act”) and the rules and orders made there under to
The Director M/s.DOW CHEMICAL INTERNATIONAL PRIVATE LIMITED, S.F.No. Plot No. L7, SIPCOT industrial Park, Phase II, PONTHUR A B C BLOCK village, Sriperumbudur Taluk, Kancheepuram District.
Authorising the occupier to make discharge of sewage and /or trade effluent.
This is subject to the provisions of the Act, the rules and the orders made there under and the terms and conditions incorporated under the Special and General conditions stipulated in the Consent Order issued earlier and subject to the special conditions annexed.
This RENEWAL OF CONSENT is valid for the period ending March 31, 2019
For Member Secretary, Tamil Nadu Pollution Control Board, Chennai
1 SPECIAL CONDITIONS
1. This renewal of consent is valid for operating the facility for the manufacture of products/byproducts (Col. 2) at the rate (Col 3) mentioned below. Any change in the product/byproduct and its quantity has to be brought to the notice of the Board and fresh consent has to be obtained. Sl. Description Quantity Unit No. Product Details 1. Water Based Latex polymer 40000 MT/Year 2. Latex Polymer Cake 407 MT/Year 2. This renewal of consent is valid for operating the facility with the below mentioned outlets for the discharge of sewage/trade effluent. Any change in the outlets and the quantity has to be brought to the notice of the Board and fresh consent has to be obtained. Outlet No. Description of Outlet Maximum daily discharge Point of disposal in KLD Effluent Type : Sewage 1. Combinedly Treated with 0.0 Recycling Trade effluent Effluent Type : Trade Effluent 1. 101.0 Recycling to process Combined(Sewage+Trad e Effluent)-RO Permeate 2. Combined 20.0 Recycling to process (Sewage+Trade Effluent)- II Evap.Condensat 3. Combined Effluent III 4.8 Mother Liquor Recycle to Rejects evaporator
2 Additional Conditions: 1. The unit shall operate and maintain the zero liquid discharge treatment components comprising of primary, secondary and tertiary treatment components at all times and ensure that the RO permeate shall be recycled in the process and the final RO reject shall be disposed off with the reject management system ensuring zero liquid discharge of effluent in the premises. 2. The unit shall operate and maintain the Reject Management System (RMS) such as the MEE effectively and recover the salt from the systems which shall be stored within the premises with log book . 3. The unit shall ensure zero liquid discharge of effluent thereby no discharge of untreated/treated effluent on land or into any water bodies either inside or outside the premises at any point of time. 4. The unit shall maintain the log book to the peizometers for monitoring the ground water quality and seepage. 5. The unit shall operate and maintain the EMFMs provided for the Zero Liquid Discharge System (ZLDS) at various locations continuously and efficiently and maintain log books for the same to furnish the monthly report to the Board. 6. The unit shall maintain log books for the consumption of various chemicals in the treatment plant / ZLDS, Energy consumption, fresh water consumption, Chemical sludge and bio sludge generated from the ZLDS, RO permeate recovered the salt residues collected from the MEE. 7. The Unit shall operate and maintain the nutche filter efficiently and continuously for handling solids from zero liquid discharge system. The separated solids shall be stored in drums in designated area before disposal to TSDF. 8. In order to prevent the formation and accumulation of toxic gases inside the tanks and prevent the occurrence of fatal accidents while cleaning the tanks, adequate ventilation arrangements should be provided in all the tanks including septic tanks. The sludge accumulated in the ETP components shall be cleaned mechanically only and manual cleaning of the sludge should not be carried out under any circumstances. 9. The unit shall constantly improve its processing, ETP, RO and RMS facilities so as to reduce reject generation and the discharge to the MEE. 10. The unit shall install solar panel of Restriction of Hazardous Substance (RoHS) standards for lighting of the office & factory building to the maximum extent possible and street lighting within the factory premises. 11. The unit shall install Electro Magnetic Flow Meter(EMFM) for process make up water to measure the actual daily water consumption. 12. The unit shall dispose the Hazardous wastes as per the Authorization obtained under Hazardous Waste (MH&TM) Rules, 2008 and also comply with the provisions of Hazardous and Other waste (M&TM)Rules, 2016. 13. In case of revision of consent fee by the Government, the unit shall remit the difference in amount within one month from the date of notification. Failing to remit the consent fee, this consent order will be withdrawn without any notice and further action will be initiated against the unit as per law.
For Member Secretary, Tamil Nadu Pollution Control Board, Chennai
To The Director, M/s.DOW CHEMICAL INTERNATIONAL PRIVATE LIMITED, Plot No L7, SIPCOT Industrial Park,Phase II, Pondur and Araneri Village, Sriperumbudur Taluk, Kancheepuram District, Pin: 602106
Copy to: 1.The Commissioner, SRIPERUMBUDUR-Panchayat Union, Sriperumbudur Taluk, Kancheepuram District . 2. The District Environmental Engineer, Tamil Nadu Pollution Control Board, SRIPERUMBUDUR. 3. The JCEE-Monitoring, Tamil Nadu Pollution Control Board, Chennai. 4. File ------
** This consent order is computer generated by OCMMS of TNPCB and no signature is needed**
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Annexure VI
Adequacy Report of ETP
ADEQUECY REPORT FOR EFFLUENT TREATMENT PLANT
62
Method of Treatment
Process Effluent A Latex Polymer whitewater stream containing 1-2% polymer solids are coagulated in two whitewater pits with a polyelectrolye polymer. The coagulum is pumped to a plate and frame filter press where solid polymer cake is removed. This by product is completely polymerized latex material. It has a potential to be used as fuel is furnaces and in Rubber / Plastic compounding. The filtrate is then pumped to the common biotreatment train.
Domestic Waste Domestic waste is collected in a segregated pit before being fed to the common biotreatment train.
Cooling Tower and Boiler Blowdown These streams are collected in a segregated pit before fed to the common biotreatment train.
Common Bio-treatment Train Effluent from the three collection pits will be collected in equalization tanks which serve to equalize the flow and composition of different effluent streams. Slow speed mechanical agitator will be provided in each equalization tank for uniform mixing of the effluent.
Effluent from equalization tanks will be pumped to aeration tank by feed pumps. The aeration tanks will be aerated using a diffused aeration system which will supply oxygen for the growth of microorganisms and uniform mixing. The MLSS (Mixed Liquid Suspended Solids) that develop shall be allowed to settle in the secondary clarifier (Settler). The sludge from secondary clarifier shall be re- circulated back to aeration tank for maintaining the MLSS concentration in the aeration tank by sludge re-circulation pumps. Excess sludge shall be diverted to sludge drying beds for dewatering.
Zero Liquid Discharge System The bio-treatment effluent is then pumped through a pressure sand filter and activated carbon filter to a bio-treated water surge tank. This tank feeds the recycle RO unit in a batch fashion. The recycle RO permeate is recycled to the raw water pond and eventually returned to the process. The reject stream from the recycle RO unit is pumped to a tank which then feeds a mechanical evaporator. The concentrated liquor from the mechanical evaporator is then fed to a drier / evaporator pan where it is converted to solids for secured landfill disposal.
Design Details of the Treatment Units
The Effluent Treatment Plant is designed for 70,000MT/ PA capacity
(i) Collection cum Equalization tank - RCC Flow : 150 m3/day Detention period : 16 hours Volume required : 150 m3 2 tanks, 4m x 3.2m x 4m Size of the tank : (SWD) (Complete mixing of 2, 50 m3 Coarse bubble aeration : tanks)
(ii) Aeration Tank -RCC Flow : 150m3/day MLSS concentration : 4000mg/L MLVSS concentration : 3500mg/L Influent BOD : 500mg/L BOD Load : 75 kg/day
Tank capacity : 275 m3
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Detention period : 44 hours 11mx5mx5m 11m Size of the tank – Aeration : LxWxD
F/M ratio: 0.1
Oxygen requirement (designed) : 150 kg/day 250Nm3 /hr;0.5 kg/cm2 Capacity of Blower : Pressure - 2 Nos
(iii) Settler 150 m3/day (Design flow- Flow : 7.4m3/hr Detention period : 2 hours Volume required : 14.8 m3 Size : 3 m dia x 2.5 liquid depth Volume of the tank : 17.6 m3
: 24 m3/m2/day Surface loading rate (design) (Equivalent to 170 m3/day)
Partially Treated Effluent Collection (iv) sump Flow : 150 m3/day Detention time : 2 hrs Volume required : 12.5 m3 Size of the tank : 2.0 x 2.5 x 2.5 m (LxWxD)
(v) Multi grade Filter Flow : 150m3/day Rate of Filtration : 7m3/hr Size of the filter : 60 cm diameter
Waste RO treatment – 2 stage RO with all (VI) accessories
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List of Equipment -Refer Annexure-A
(e) Details of Recycle R.O. Plant
R.O. Feed Effluent Characteristics
The effluent water analysis considered for system design
Sl.No. Parameter Value Unit 1. pH 6.5 mg/l 2. Total Suspended Solids 100 mg/l 3. Total Dissolved Solids 1150 mg/l 4. Chlorides 500 mg/l 5. Sulphates 500 mg/l 6. Chemical Oxygen Demand 100 mg/l 7. Biological Oxygen Demand 20 mg/l 8. Oil And Grease 5 mg/l
Operating parameters of R.O. System
Feed Capacity : 9.3 m3/hr Output Capacity : 7.44 m3/hr Feed TDS : <1150 mg/l Permeate TDS : Less than 100 mg/l Reject TDS : <5500 mg/l System Recovery : 80%±2 Reject flow rate : 1.26 m3/hr Operating pressure : 21 kg/cm2
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Treatment Scheme: Effluent storage tank 1 Feed Pump : 1 No. 2 Iron Removal Filter : 1 No. 3 Pressure Sand Filter : 1 No. 4 Activated Sand Filter : 1 No. 5 Acid dosing system : 1 No. 6 Antiscalant dosing system : 1 No. 7 Dechlorination system : 1 No. 8 Bag Filter : 1 No. 9 Micron Cartridge filter : 1 No. 10 R.O. system : 1 No. 11 Chemical cleaning system : 1 Set.
Reject water storage tank : 1 No. 1. Reverse Osmosis System
1 Feed capacity : 9.3 m3/hr 2 Output Capacity : 7.44 m3/hr 3 Module Type : Spiral wound/ Disc Tube 4 Make : Hydranautics /ROCHEM /eqvt 5 Membrane specification : TFC Polyamide 6 Membrane Size : 8” dia x 40” long each 7 No. of Membranes : 6 Nos 8 MOC of pressure vessels : FRP/PP 9 High Pressure Pump : 01 No. 10 MOC of pump : All wetted parts – SS 316 11 Pump type : Verticle, Centrifugal 12 Pump make : Grundfos/equivalent 13 Motor for pump : 1 No. , 3 phase 14 Interconnecting piping : 1 set in SS 316 & CPVC 15 Pressure gauges : 2 Nos. 16 Flow meters : 2 Nos. 17 Digital PH meter : 1 No. 18 Digital TDS meter : 1 No. 19 Digital ORP meter : 1 No. 20 High Pressure switch : 1 No. 21 Low Pressure switch : 1 No. 22 Electrical panel : 1 No. 23 Instrument panel : 1 No. 24 Control valve : 1 No. 25 Recycle flow valve : 1 No. in SS 316 26 System Stand : 1 No. with MS epoxy painting
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DETAILS OF MECHANICAL EVAPORATOR – 45 KLD
The reject from recycle RO is further evaporated in a mechanical evaporator. This evaporator will be suitably designed to handle 45 KLD of reject from recycle RO. GENERAL PROCESS DESCRIPTION OF EVAPORATOR
Feed (RO rejects) shall be pumped by Feed Pumps from the RO Reject Tank to Degasser Tower. 33% HCl shall be dosed in the feed line from Acid Dosing Tank with the help of diaphragm type HCl Dosing Pump. The mixing of feed with HCl shall be ensured by using online Static Mixer.
From Degasser Tower Tank the second Feed Pump shall pump the liquid through four Preheaters in series. The purpose of Preheaters is to preheat the effluent from ambient temperature to approx 85-90 deg C. So that the vaporization starts taking place as it enters in first Calandria.
The first Calandria shall be designed for forced circulation where the preheated effluent shall be forced and recirculated in tubes with high velocity. Forced Circulation Evaporator is selected to avoid frequent fouling of Calandria by recirculating feed at high velocity from Calandria tubes. To enhance the evaporation process under vacuum, motive steam is expanded through Thermocompressor and steam is supplied on the jacket side of first Calandria. The steam line shall be provided with control loop including pressure transmitter, I/P converter and control valve to control the steam pressure in the first Calandria. Feed shall be recirculated by Recirculation Pump through Calandria tubes and shall be partially forwarded to second Calandria.
Vapours from first Calandria shall move forward in the first Vapour Separator where any residual liquid shall be separated out and pure water vapour shall move in the jacket of second Calandria. The vapour shall give away the heat to the concentrated mother liquor flowing in the tube of second Calandria designed for forced evaporation. The vapour generated in second Calandria shall move forward to second Vapour Separator. The vapour shall be sent to the jacket of third Calandria, whereas the concentrated effluent shall be sent to tubes of third Calandria.
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The first and second Calandria shall concentrate the feed effluent below it’s saturation limit so that crystallization does not take place. The effluent, which is almost saturated shall be sent into the third Calandria. Recirculation Pump shall recirculate the concentrated brine to third Calandria to maintain the tube velocity while salt shall be precipitated due to continuous evaporation of water.
Vapour generated from third Vapour Separator shall be condensed in Direct Contact Barometric Condenser. The concentrated brine (slurry) shall be transferred by Concentrate Outlet Pumps to a Settler. Nutsche Filter shall receive settled solids from the Settler. The saturated liquor from Filter and settler shall be sent back to RMS through Balance Tank. Two Stage Steam Jet Vacuum System with Direct Contact Condenser shall maintain the vacuum in the RMS.
Steam condensed in first Calandria and water vapours condensed in jackets of Preheaters and other Calandrias shall be pumped out by Condensate Outlet Pump through the Condensate Pot. The cooling water and balance condensates from the Barometric Condensers shall be recirculated back to the Cooling Tower.
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LIST OF EQUIPMENT FOR TRIPLE EFFECT EVAPORATOR SYSTEM
SR. DESCRIPTION EQUIPMENT/ TANKS DETAILS NO. 1 Recycle RO Reject Tank (Feed MSRL;30 KL – 1 No Tank) 2 Feed Pump 1 2 m3/hr ,centrifugal 3 Acid Dosing Tank -FRP 100 lit; 1 No 4 Acid Dosing Pump 6 Lph;1 No; Diaphragm type 5 Static Mixer 1 No 6 Degasser Tower with fan 500 lit;Air flow – 50 m3/hr 7 Feed Pump -2 2.2 m3/hr; centrifugal 8 Pre heaters 4 10 First Calandria Forced Circulation; SS 304 tubes 11 Recirculation Pump-1 1 no;Axial;150 m3/hr 12 Second Calandria Forced Circulation; SS 304 tubes 13 Recirculation Pump-2 1 no; Axial;100 m3/hr 14 Third Calandria Forced Circulation; SS 304 tubes 15 Recirculation Pump-3 1 no;Axial;100 m3/hr 16 Vapour Liquid Separators 3 Nos; MSRL 17 First Condenser Direct Contact Type/ Barometric 18 Second Condenser Direct Contact Type/ Barometric( small) 19 Ejectors for Vacuum 2 stage steam jet 20 Condensate Pot 1 No; 150 lit 21 Condensate Outlet Pumps 2 nos; centrifugal;2 m3/hr 22 Salt Settler 1 No; MSRL 23 Nutsche Filter Feed Pumps 1 no; centrifugal;2 m3/hr 24 Nutsche Filter 1 no; 0.8 m dia 25 Vacuum Pump 49 m3/hr; 2 KW 26 Hot Well 1 KL; with partition 27 Cooling tower with pumps 100 TR capacity
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Annexure- A
LIST OF TANKS AND EQUIPMENT - ETP
Sr. Quantity Equipment / Tank Specifications No. Installed 1 1 no. Filter Press Sump 2.35 m sq. x 2.35 m ht. RCC construction 2 1 no. Filtrate Transfer Centrifugal, negative suction, Pump * 3 m3/hr, 10 mwc CI Casing & Impeller 3 1 no. Sewage Sump 2.0 m x 2.0 m x 1.55 m ht RCC construction 4 1 no. Sewage Transfer Centrifugal, negative suction, Pump 1 m3/hr, 10 mwc CI Casing & Impeller 5 1 no. Blow Down Collection 1.4 m x 1.4 m x 1.4 m ht. Tank RCC construction 6 1 no. Blow Down Transfer Centrifugal, negative suction, Pump * 1 m3/hr, 10 mwc CI Casing & Impeller 7 1 no. Drain Pit 1.4 m x 1.4 m x 1.4 m ht. RCC construction 8 1 no. Drain Pit Transfer Centrifugal, negative suction, Pump 1 m3/hr, 10 mwc CI Casing & Impeller 9 2 nos. Equalization Tank 3.8 m x 3 m x 3.8 m ht. Each compartment RCC construction 10 1 no. Equalization Tank Centrifugal, flooded suction, Transfer Pump 4 m3/hr, 8 mwc CI Casing & Impeller 11 2 nos. Aeration Grid Coarse bubble diffusers, HDPE pipe work 12 1 no. Aeration Tank 11 m x 5 m x 5.0 m ht. RCC construction 13 1 set Diffusers for Aeration Fine bubble, tubular diffusers in EPDM -10 Nos 14 1 no. Clarifier Tank 3m dia. x 3.0 m ht. RCC construction 15 1 no. Clarifier Mechanism Full bridge, rotating scraper, drive, MSEP wetted parts 16 1 no. Surge Tank 2.25 m x 2.5 m x 2.5 m ht.
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Sr. Quantity Equipment / Tank Specifications No. Installed RCC construction 17 1 no. Sludge Recirculation Centrifugal, flooded suction, Pump 4 m3/hr, 8 mwc CI Casing & Impeller 18 1 no. Sludge Recirculation Centrifugal, flooded suction, Pump / Common 4 m3/hr, 8 mwc Installed Standby CI Casing & Impeller Equalization Tank Transfer Pump 19 1 no. Chlorine Dosing Tank 250 litres, MSRL 20 1 no. Chlorine Dosing 0-5 LPH, PP liquid end Pump 21 2 nos. Air Blowers Rotary lobe, positive displacement, 250 Nm3/hr, 5500 mm WG 22 2 nos. Sludge Drying Beds 23 4 nos. Sluice Gates Cast Iron, Manual operation 24 1 no. UF Feed Pump Centrifugal, flooded suction, 10 m3/hr, 50 mwc SS 316 shaft & SS 304 Impeller 25 1 no. Multi-Grade Filter Flow – 10 m3/hr, MSRL pressure vessel, (MGF) granular media, 0.6m dia. x 2.5m HOS, Op. pressure – 5 kg/cm2 26 1 no. Static Mixer III Flow – 10 m3/hr, SS 304, 30% HCl 27 1 no. Basket Strainer Flow – 10 m3/hr, SS 304 pressure vessel, Op. pressure – 4 kg/cm2 28 Lot Recycle UF Unit 9.5 m3/hr, 3 kg/cm2 feed pr., Hollow fiber, Membrane: 8” dia. x 72” length 29 1 no. UF Backwash Pump Centrifugal, flooded suction, 27 m3/hr, 40 mwc SS shaft & Impeller 30 1 no. UF Permeate Tank HDPE, 5 m3 capacity, 1.8 m dia. x 2.3 m Height 31 1 no. Cartridge Filter II Centrifugal, flooded suction, Pump 9.3 m3/hr, 25 mwc, SS shaft & Impeller 32 1 no. Cartridge Filter II 9.3 m3/hr , op. pr.: 2.5 kg/cm2, 5 micron rating, PP housing 33 1 no. Static Mixer IV Flow – 10 m3/hr, SS 304, Antiscalant and dechlorination solution 34 1 no. High Pressure Pump Vertical, in-line, multistage, centrifugal II 7.3 m3/hr, 180 mwc, SS 316 casing, shaft & impeller
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Sr. Quantity Equipment / Tank Specifications No. Installed 35 Lot Recycle RO Unit 9.3 m3/hr feed, 78 % Recovery, 4.14 m3/hr Permeate, Spiral wound 4” x 40” length elements, FRP tubes. 36 1 no. Booster Pump Vertical, in-line, multistage, centrifugal 10 m3/hr, 180 mwc, SS 316 casing, shaft & impeller 37 1 no. Acid Dosing Tank II 250 litres, FRP 38 1 no. Acid Dosing Pump III 0-26 LPH, PP Liquid end 39 1 no. Antiscalant Dosing 250 litres, HDPE Tank II 40 1 no. Agitator for High speed, SS 304, bracket support Antiscalant Dosing Tank II 41 1 no. Antiscalant Dosing 0-5 LPH, PP Liquid end Pump II 42 1 no. Dechlorination 250 litres, HDPE Solution Dosing Tank 43 1 no. Agitator for High speed, SS 304, bracket support Dechlorination Solution Dosing Tank 44 1 no. Dechlorination 0-5 LPH, PP Liquid end Solution Dosing Pump 45 1 no. Shed Common for UF & RO membranes of WWTP and RO membranes of WTP.
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Annexure VII
Hazardous Wastes - Authorization
Annexure VIII
Affidavit – No Violation
Annexure IX
Noise Level Survey and Ambient Air Quality Survey Results
Annexure X
Layout
Annexure XI
Lease Deed