Landfill Gas Energy Technologies

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Landfill Gas Energy Technologies ( landfill-gas-energy-technologies )

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with contaminants from LFG fuel. Stirling engine can be equipped with low cost integral heat exchangers for combined heat and power (CHP) applications. It has a 30% electrical efficiency and 80% total system efficiency in CHP applications. Low maintenance costs- requires very little fuel treatment and generally requires maintenance only once a year in full-time operation. Do not require costly fuel compressors. efficient internal combustion engine. Not commercially available. High capital cost. Not a proven technology. Biomethane production Can be sold into a natural gas pipeline. Membrane separation. Easy to construct. Simple to operate. Pressure Swing Adsorption (PSA): • No operating material necessary except process water, chemicals, etc. • Many reference systems in Europe. Requires potentially expensive gas processing. Increased cost due to tight management of wellfield operation needed to limit oxygen and nitrogen intrusion into LFG. Membrane separation: High methane losses Short life of membranes (approx. 3 years) Need to ensure high pressure. Pressure Swing Adsorption (PSA): • High pressure is necessary (means high energy consumption). • System must be able to operate safety at high pressure (high cost). • Relatively high methane losses. 1,000 and based currently operation projects 3 m /h up, on Source: [7]. 77

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