CBG or compressed biogas is the compressed form of biogas which makes it more superior and commercially viable form of biogas that can be produced by anaerobic digestion of biodegradable wastes such as agro-wastes, industrial wastes and sludge and commercial wastes. CBG contains about 92-98% of methane and only 2-8% of carbon dioxide. The calorific value of CBG is about 52,000 kilojoules (kJ) per kg, which is significantly higher than that of biogas. 1m3 of CBZ gives around 6KWh of electricity. The high methane content and calorific value, combined with the low quantity of moisture, hydrogen sulphide and impurities, makes it an ideal fuel for automobiles, industries and commercial sectors. The low emission levels of CBG also make it a more environment-friendly fuel than biogas.
CBG is produced in an Anaerobic digester which is completely sealed, and free of oxygen. The output gas is then scrubbed, upgraded and compressed upto (200 bar pressure) to produce compressed biogas (CBG).
