A biodigester is a structure constructed under the ground, made with cement, brick/stone, sand and pipes & appliances to decompose organic material and produce biogas- to supplement conventional fuel sources; and bioslurry- to apply as organic manure in the farms. By feeding the recommended amount of cattle dung/pig manure and water every day in the digester, clean gas is produced. This fuel is used mainly for cooking and lighting purposes where as the digested slurry is used in vegetable gardens and agricultural fields.