Biogas plants have proven to be the cheapest and the most convenient to set-up source of green and renewable energy. Biogas generates from anaerobic digestion of organic compounds such as food wastes, cellulosic biomass, and animal waste. Because of its low calorific value, biogas use had been limited to households only. However, with the latest innovations in technology and the introduction of biogas enrichment plants , this environmentally friendly energy can even be used as vehicle fuel, for the generation of electricity etc. Need for Biogas enrichment system Biogas produced in the waste treatment plants and wastewater treatment stations is a mixture of: Methane: 50-70% Carbon Dioxide 30-45% Hydrogen Sulphide Water Siloxanes Other impurities The presence of contaminants like Hydrogen Sulphide, Siloxanes, Carbon Dioxide , and Water make it impossible to use this gas for commercial purposes as they limit the amount and potential of the methane gas. The Carbon Dioxide