Land Fill Gas to Electricity

Municipal waste contains about 150 to 250 kg of organic carbon per ton. These substances are biologicallydegradable and are converted by microorganisms into landfill gas. Stable, anaerobic methane fermentation begins one to two years after the waste is deposited in the landfill.  1,000,000 tons of waste produce 1 MW electricity & 1.2 MW of heat for more than 15 years 

Jenbacher gas engines achieves >41 % electrical efficiency, 8,000 OpH  More than 2,200 Jenbacher gas engines around the world with an electrical power of more than 2,300 MW  By capturing landfill gas instead of emitting it directly into the atmosphere and using it for power generation in place of fossil fuels, these engines can reduce greenhouse gas emissions of about 60 million metric tons each year. 
These fuel gases are produced by the conversion of liquid or solid organic substances by micro-organisms. Like associated petroleum gas, they are characterized by a medium to high methane content and the constituents N2 and CO2. However, as this gas emanates from highly heterogeneous substances, special care must be taken with regard to trace substances and impurities.