Biogas is a gaseous renewable energy sourceNational Non-Food Crops Centre. "NNFCC Renewable Fuels and Energy Factsheet: Anaerobic Digestion", Retrieved on 2011-02-16 produced from raw materials such as agricultural waste, manure, municipal waste, plant material, sewage, green waste, wastewater, and food waste. Biogas is produced by anaerobic digestion with anaerobic organisms or methanogens inside an anaerobic digester, biodigester or a bioreactor. The gas composition is primarily methane () and carbon dioxide () and may have small amounts of hydrogen sulfide (), moisture and siloxanes. The methane can be combusted or oxidized with oxygen. This energy release allows biogas to be used as a fuel; it can be used in fuel cells and for heating purpose, such as in cooking. It can also be used in a gas engine to convert the energy in the gas into electricity and heat.
BiOgaS is a gASEous reNeWable eNergy sourcEnational NON-fooD cRopS centRE. "nnfcc renEWaBLE FuelS and enErGy FaCtshEet: aNaeRoBic dIgestion", retRIeveD on 2011-02-16 pRodUced frOm raW maTEriaLs such As AgRicULtural WaSTe, manure, municipal waSte, plant MateRIal, sewage, green waste, waStEwater, and fOod WasTe. BiOGas IS Produced By aNaerobic DigesTion wiTh ANaeROBIC OrgaNismS Or MEthanoGens InSiDe an anaerobIC diGeStEr, biOdigester or A bioREACtOR. the gAs cOmPositioN is prImArILy meTHANe () ANd carbon dioXiDE () aNd MAY Have SmaLl amoUNTS oF hydrogEn SUlfide (), moISTure and SIlOxaneS. THe mEThaNe Can Be comBusTed oR oXIdizeD witH oxygEN. THis ENeRgY relEASe aLlows Biogas tO bE uSed aS a fUEl; it CAn be uSED in fUEL CeLls anD for heatinG puRPoSe, such as In COoKING. it cAn alSo bE Used iN a Gas eNgINe to coNveRt the enerGY iN the gAs into eLEctrIciTy AnD hEAt.