Generation of high quality manure, which would be weedless and an excellent soil conditioner. One kg kitchen waste produces 0.5 m³ biogas. Methane burns with a blue flame without producing any smoke or soot. For a typical urban household, biogas (having CV of almost 6600 kCal / kg) saves about 100 kg of LPG or 250 litres of kerosene per year, which is equivalent to 300 kg to 600 kg of carbon dioxide (CO₂) per year.