Patent ID: 8759052

Claim:
A process for the production of a biogas containing methane from an organic matter amenable to anaerobic digestion, comprising feeding an anaerobic digester with said organic matter, said anaerobic digester containing an aqueous medium comprising microorganisms capable of digesting said organic matter to obtain a digestion medium comprising an aqueous liquid, converting part of said organic matter into biogas, wherein: the total inorganic carbon concentration of the aqueous liquid of the digestion medium is maintained during anaerobic digestion above 9500 mg of equivalent CaCO3/l, the buffering capacity of the digestion medium is maintained above 200 mmol/l by addition of a buffering reagent comprising sodium bicarbonate to the digestion medium, the anaerobic digester is operated continuously, and the feeding rate of the anaerobic digester with said organic matter is at least 4 kg of dry organic matter per cubic meter of digestion medium per day.