Sewage Gas Sewage Gases Sewage Gas to Renewable Power Benefits of Sewage Digestion

Wastewater professionals once — Generation of Clarke Energy is the authorised distributor and service accepted the high costs of from a waste material partner for GE Energy’s division in a growing operating wastewater treatment — Reduction in carbon emissions number of countries across the world. In addition to facilities as a consequence of especially compared to aerobic providing high-efficiency, reliable gas engines we combine meeting their discharge permit sewage treatment requirements. As the cost of energy — Economical onsite electrical this with the expertise and resources to deliver unbeatable rises and emphasis on renewable power production & reduced product support. energy increases, local authorities transmission losses and municipalities are seeking — Production of soil improver Whether your requirement is for the supply of a single gas solutions that save money and meet — Cost effective, proven engine generator or a complete turnkey power generation renewable requirements. GE technology facility, we can meet that need. Our ability to add value by Energy’s gas engines provide a renewable energy solution offering an end-to-end service, from initial proposal to that results in long-term savings for reliable long-term maintenance, has led to us becoming a wastewater treatment plants multi-national company with operations in ten countries (WWTPs). across the globe. Our company prides itself on integrity, delivering only the highest quality products whilst providing a reliable accountable localised service.

Benefits of working with Clarke Energy Clarke Energy provides flexible solutions for your gas generation projects. Our services range from the supply of a gas engine generator, through to the complete turnkey installation of a gas powered generation facility. Clarke Energy has a dedicated, top-quality team of sales, , project management, commissioning and maintenance staff to meet your needs. We also offer long-term maintenance contracts backed up by a strong balance sheet, giving peace of mind with respect to the long-term performance of your GE gas generation equipment.

Sewage Gas Schematic

Exhaust gas

Reading, UK, sewage treatment works Gasometer Sewage gas

Heat Gas compressor exchanger

Sewage sludge Heat Digester consumer

Electrical energy Sewage sludge, agricultural Sludge utilisation possible drying Energy Costs Conversion Steps from Sewage Advantages Our competence to Power

Waste treatment processes include The process of generation is Seamless dual fuel mixing Clarke Energy has extensive energy-intensive operations such as divided into for steps: maximises renewable energy output experience in the engineering, aeration and pumping. As a result, and smoothens gas production installation and maintenance of WWTPs require significant energy 1. Preparation of the input material fluctuations by supplementing with generation facilities operating on consumption. As electrical prices including removal of physical as required. sewage gas and other gases increase, plant operators are facing contaminants derived from biological sources. higher energy costs in order to meet 2. Digestion (fermentation), High electrical efficiencies help discharge permit requirements. The consisting of hydrolysis, generate more electricity per unit of The GE Jenbacher gas engine is second leading expense to WWTP acetogenesis, acidogenesis and sewage gas used. Electrical known for having the highest levels owners is the cost of energy, behind methanogenesis efficiencies of up to 43% based of electrical efficiency on the market. only personnel. For plants that 3. Conversion of the biogas to upon the lower heating value of the When coupled with a contractual employ anaerobic digestion for renewable electricity and useful gas are achieved with GE Jenbacher maintenance agreement with Clarke biosolids treatment, the process of heat gas engines. Energy, it will give peace of mind to combusting digester gas to produce 4. Post treatment of the digestate our customers that they will achieve electricity and heat may provide a LEANOX controls with turbocharger the highest levels availability and solution to rising operational costs. Sewage is collected in municipal bypass ensures the correct air-to- hence consistent returns from their sewage systems and sent to the gas ratio under all operating biogas plant. A large proportion of the world’s waste water treatment plant. From conditions to minimise exhaust gas sewage systems do not recover here it is prepared and sent to the emissions while maintaining stable value from the sewage in the form of sewage digesters. operation. electricity and heat. But, the renewable energy fuel source In the digestion tanks a series of Longer overhaul schedule minimise derived from sewage gas can be biological processes are harnessed maintenance costs with 60,000 converted using reciprocating gas in order to produce biogas. operating hour overhaul intervals. engines, to electricity and heat, Hydrolysis is the process where the offsetting as much as two-thirds of a organic material is solubilised into the plant’s electricity demand and digestion liquid. It then undergoes the eliminating the need to purchase intermediate steps of acidogenesis fossil fuels for plant heating and acetogenesis which create the processes. precursor molecules for methanogenesis. Methanogens feed off these precursors and produce methane as a cellular waste product.

The biogas containing this biologically-derived methane is contained and captured in a gas storage tank which is typically located separately to the main digester. The gas storage tank acts as a buffer in order to balance fluctuations in the production of gas Beddington, UK, 1x JGMC 312 in the digesters.

Where gas production levels are low or highly variable, dual fuel mixing can be used to supplement the sewage gas with natural gas from the mains distribution network.

Mapocho, Chile, 3 x JMS620 If you would like to find out more about how Clarke Energy can help you develop your sewage gas project, please contact your local office for more details.

Algeria

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India

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