The biogas plant tank is fed with slurry of dung. A floating cover is placed over the slurry which keeps on rising as the gas is produced in the tank due to the microbial activity of methanogens like Methanobacterium. Methanogens grow anaerobically on cellulosic material in cow dung to produce large amount of methane, CO2 and H2. The biogas plant has an outlet, which is connected to a pipe to supply biogas. The spent slurry is removed through another outlet and is used as fertiliser.
a—Sludge tank; b—Gas holder; c—Charge pit (Gobar + H2O) inlet
