Biogas is composed of methane, C02, H0 and At 40% methane content, calorific value is 3,214 k cal/m-\ at 50% is 4,429 k cal/m3 and at 55% is 4,713 k cal/m3. In order to make best use of biogas technology, two things are relevant restricted use of water and better strains of methane generating bacteria. There is to be developed a dry process, which requires less of water. Also there is need for Methanogenesis, able to operate at temperatures lower than 20°C. The ideal temperatures for methane generation are 35°C or more.