Group of bacteria used in biogas production is

Explanation

Biogas is a mixture of methane `(CH_(4)),Co_(2)`, traces of `H_(2)S` and moisture. It is generated by the decomposition of excreta or dung of cattle, domestic waste material and industrial and agricultural sewage due to the activity of anaerobic bacteria (Methanococcus and Methanobacillus) present in them. it is used as fuel. the bacteria which grow anaerobically on cellulosic material produce large amount of Biogas, and the Bacteria are called Methanogens. E.g :Methano bacterium commonly found in the anaerobic sludge during sewage treatment and also present in the food of cattle and in the rumen of cattle. in rumen, this bacteria help in the breakdown of cellulose and play an important role in the nutrition of cattle. the excreta or dung can be used for generation of biogas (Gobar gas).