How does it work? “A biogas unit comes with a digester tank in which everyday kitchen waste gets digested by anaerobic bacteria that emit about 70% methane and other gases. This gas is stored within the upper chamber that floats in water. The gas is collected in the gas drum, which rises or moves down, according to the amount of gas stored. The gas drum is prevented from tilting by a guiding frame. If excess gas is produced, it is automatically released due to buoyancy ensuring safety. When the drum floats in a water jacket, it cannot get stuck, even in substrate with high solid content. As the gas rises, it passes through a gas pipe connected to a Biogas stove, similar to LPG stoves, and is ready for cooking,” said Samrudhh Hegde Desai, Partner Alterenergyz