40-L- biogas reactor height of 0.5 meters and a diameter of 0.25 m was fabricated from galvanized steel. Galvanized steel is used as a building material because of its strength and durability in an acidic environment. Top lid of the digester for insertion of temperature and pH using an control pipes threaded steel and rubber to avoid leakage of the gas cylinder is used to add to the mix, the better is Air tank. The vacuum-tight and clearly laid above ground level that has been exposed to the sun to heat some of 12.1. Liter gas cylinder with a height of 0.25 m and a diameter of 0.25 m was fabricated from sheet metal and is used to store the gas until it is used in the production of heat or used to replace or supplement the supply of gas.