The Bio-methanation process is the essential processes for treating the Bio- degradable portion of Municipal Solid Waste. In this process the organic matter is converted into biogas that is the useful form of energy. In the bio-methanation process, the bio- methanation process reactor, called Bio-digest is used in which the temperature and atmosphere is controlled by the process to occur. Depending on the feedstock, method of operation, volume of the digester, the sternness of health and environmental consequences due to biomethanation that varies considerably.