Biogas energy can be produced from various wastes such as domestic wastes. It is produced by the breakdown of organic matter in the absence of oxygen. Typically biogas is a mixture of various gas. The gases in the mixture are methane, carbon monoxide, hydrogen sulphide, water vapor, siloxanes.
Fermentation of biodegradable materials such as manure, sewage, municipal waste, green waste, plant material, and crops is used to produce this biogas. The anaerobic digestion of the anaerobic bacteria is used to create it. Anaerobic means without oxygen. Thus the anaerobic bacteria works without oxygen.