Methane fermentation biogas

Izumi J, Wang HX (2009) Recovery and purification of methane from fermentation biogas provided with adsorbents PCT Int Appl, WO 2009101669 Al 20090820... 

In the absence of oxygen, in a closed reactor, anaerobic bacteria ferment organic matter into methane and carbon dioxide, a mixture named biogas. Biogas is produced through the activity of common methane bacteria that cause anaerobic degradation over a broad temperature range from 10°C to over 100°C. 

Biogas is the general term for gases produced by the fermentation of manure and plant material under anaerobic conditions. When plant material (manure, straw, vegetables) decays in the absence of air, bacteria produce biogas. Biogas is a mixture of 60% methane and carbon dioxide. 

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