Due to the increasing demand for fossil fuels and environmental threat, a number of renewable sources of energy have been
studied worldwide. An attempt is made to assess the suitability of alternative fuels like Methanol, Ethanol, Hydrogen,
Natural Gas, LPG, CNG, LNG, Biogas and Biodiesel for diesel engine operation with and without any modifications in its
existing construction. The main objective of this paper is to investigate Bio-gas Generation and Factors Affecting the Biogas
Generation from various organic matters by the biological breakdown. The investigated results show that biogas is the
cheapest non-conventional energy produce from various organic wastes.