Biogas from Waste Biogas from Waste Benefits of Waste Biogas Plants

Disposal and treatment of biological — Production of renewable power from Waste waste represent a major challenge — Treatment of a waste material for the waste industry. For a wide — Reduced carbon emissions range of organic substances from — Economical embedded power Clarke Energy is the authorised distributor and service agriculture, foodstuff of feed production and reduced partner for GE Energy’s division in a growing industries, anaerobic digestion is a transmission losses number of countries across the world. In addition to superior alternative to composting. — Production of soil improver providing high-efficiency, reliable gas engines we combine Biogas – a mixture of both methane — Cost effective proven technology and carbon dioxide – is created this with the expertise and resources to deliver unbeatable during anaerobic digestion and product support. serves as a high-energy renewable Waste Feedstocks fuel that can be used as a substitute Whether your requirement is for the supply of a single gas for fossil fuels. Biogas-fuelled gas engine generator or a complete turnkey power generation engines improve waste A variety of biodegradable waste facility, we can meet that need. Our ability to add value by management while maximising the feedstocks can be used in digestion use of an economical energy supply. facilities. At the outset the developer offering an end-to-end service, from initial proposal to should consider what contaminants reliable long-term maintenance, has led to us becoming a might be in this waste and how multi-national company with operations in ten countries Biogas Creation could it affect the digestion process across the globe. Our company prides itself on integrity, or the operation of the gas engines. delivering only the highest quality products whilst providing a reliable accountable localised service. Biogas results from anaerobic Waste-based facilities range from fermentation of organic materials. simple systems for the digestion of As a metabolic product of the contaminant free by products, such Benefits of working with Clarke Energy participating methanogens and as those in the food preparation Clarke Energy provides flexible solutions for your gas acidogenic bacteria, the industry, up to mixed waste generation projects. Our services range from the supply of prerequisites for its production are a digestion facilities such as a gas engine generator, through to the complete turnkey lack of oxygen, a pH value from 6.5 mechanical biological treatment to 7.5 and a constant temperature of (MBT) facilities accepting household installation of a gas powered generation facility. Clarke Energy 35-45°C (mesophilic) or 45-55°C waste. MBT facilities include has a dedicated, top-quality team of sales, , (thermophilic). The digestion period comprehensive pretreatment plants project management, commissioning and maintenance staff or retention period is typically or materials recovery facilties to meet your needs. We also offer long-term maintenance between 10 and 30 days depending (MRFs) to refine the waste materials contracts backed up by a strong balance sheet, giving upon the type of digestion employed. prior to digestion. peace of mind with respect to the long-term performance The anaerobic digestion systems of today operate largely within the of your GE gas generation equipment. mesophilic temperature range.

Biogas from Waste Schematic

Exhaust gas

Biogas

Gasometer Heat Digester exchanger Heat Gas flare consumer

Biogas Electrical Raw fertilizer for energy agricultural use

Hygenisation

Primary pit Conversion Steps from Gas Quality Considerations GE and Biogas Our Competence Waste to Power

The process of biogas generation is The biogas may contain high levels The broad range of GE Jenbacher Clarke Energy has extensive divided into four steps: of water (humidity) and sulphur, biogas engines is specifically experience in the engineering, depending upon the feedstock of designed to run at full load with high installation and maintenance of 1. Preparation of the input waste the digester. Developers of biogas efficiency and high availability, generation facilities operating on material – including removal of plants should consider the potential despite a low heating value and gas derived from biological sources. physical contaminants, particle for gas contamination when fluctuating gas quality and pressure. size reduction & pasteurisation designing their facility. The high quality and specially The GE Jenbacher gas engine is 2. Digestion (fermentation), designed engine parts resist the known for having the highest levels consisting of hydrolysis, Please contact your local Clarke impurities that usually appear in of electrical efficiency on the market. acetogenesis, acidogenesis and Energy sales office to provide you biogas and similar types of fuel. When coupled with a contractual methanogenesis with GE Energy’s technical maintenance agreement with Clarke 3. Conversion of the biogas to instruction for fuel gas quality to Before the biogas can be fed into Energy, it will give peace of mind to renewable electricity and useful understand the required specific the gas engines, it needs to be dried the customer that they will achieve heat limits. and compressed. Severe the highest levels availability and 4. Post-treatment of the digestate contaminants such as sulphur hence consistent returns from their Clarke Energy is able to supply fuel should be removed if exceeding a biogas plant. Initially the feedstock to the gas treatment equipment either free certain level. Not only will these digesters is received in a primary pit issue, or as part of a turnkey scope measures considerably increase the or liquid storage tank. From here it is of supply. These typically include availability of the generator, but they loaded into the digester by various carbon filters, gas dehumidifiers and will also reduce the costs associated different means depending upon the gas boosters. with operation. constitution of waste materials. Please request a fuel gas quality In the digestion tanks a series of specification to understand biological processes are harnessed operational limits for gas in order to produce biogas. contaminants in the generator’s fuel. Hydrolysis is the process where the organic material is solubilised into Waste based biogas systems the digestion liquid. It then typically gain revenue in the form of undergoes the intermediate steps of gate fees and from the sale of acidogenesis and acetogenesis renewable electricity and heat. This which create the precursor means that the gas engine is of molecules for methanogenesis. particular importance for the Methanogens feed off these success of the plant. Waste facilities precursors and produce methane as are typically required to operate at a cellular waste product. specific times of day and have limits on the levels of waste that is The biogas containing this permissible to be stored on site. biologically-derived methane is These factors make it essential for contained and captured in a gas the operator to have an engine with storage tank which is located the maximum levels of availability separately to the main digester, or (running time per year) and the alternatively can form its roof. The highest levels of electrical efficiency, gas storage tank acts as a buffer in in order to convert the gas to the order to balance fluctuations in the maximum level of electrical output production of gas in the digesters. and to ensure consistent plant operation.

PDM Group (Refood) Doncaster, 2 x JGMC420 + waste heat boiler

Biogengreenfinch, Westwood, UK, 2 x JGMC320 If you would like to find out more about how Clarke Energy can help you develop your waste sector biogas project, please contact your local office for more details.

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