These Engines operate with gases obtained from bio methane plants or biogas (Gober) Plants. Biogas plant generates methane gas by anaerobic digestion of organic matter, traditionally animal manures and industrial, agricultural wastes are used for biogas generation. The gas obtained from methane gas plant is an environment friendly, cheaper and is a continuous source. The raw gas has to be cleaned from toxic gases and moisture. The appropriate equipment should be removed to the harmful gases.