Biogas (or gobar gas) is used for the following purposes:
For cooking and heating
As an illuminant for domestic and street lighting using mental lantern.
For running tube-well and water pump-set engines.
Dung and any domestic / agriculture waste are mixed with water in the mixing tank. The slury so obtained is fed into the digester through the inlet chamber. Gradually, an anaerobic fermentation sets in and the biogas is produced. It takes about 6-8 weeks for a new biogas plant to start producing biogas atomic reasonably fast rate. When the pressure of biogas inside the dome increases, it start pushing the spent slurry into the outlet chamber, and finally into the overflow tank. The spent slurry being a rich source of plant nutrients is used as manure in agricultural fields.
Biogas can be taken out for supply by opening the gas valve. To make the biogas plant run continuously, dung slurry is fed into the digester and removed from it from time to time.