Biogas is a mixture of methane, carbon dioxide, hydrogen and hydrogen sulphide, the major constituents being methane. Biogas is produced by anaerobic degradation of animal and plant wastes in the presence of water. Anaerobic degradation is to break down the organic matter by bacteria in the absence of oxygen. It is a non-polluting, clean and low cost fuel which is very useful for rural areas. Biogas plants used in our country are of two types; fixed dome biogas plant and floating drum biogas plant.

Related Societies: Biomass Thermal Energy Council (BTEC), Pellet Fuels Institute, Iranian Biofuel Society (IBS), Renewable Fuels Association, Rocky Mountain Institute, Trans-Mediterranean Renewable Energy Cooperation, World Bioenergy Association.