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Abstract

A production process for producing biogas by means of anaerobic co-digestion which includes (a) preparing hydrolyzed biomass from organic solid waste by means of a thermal hydrolysis treatment of waste at between 1.5 and 4.5 bar and between 120 and 160° C., generating raw biomass from which foreign matter is separated, giving rise to clean hydrolyzed biomass with at least 90% organic matter, a volatile solids to total solids ratio of at least 0.6 and at least 5% total solids; (b) mixing the clean hydrolyzed biomass with sludge from a wastewater treatment plant (WWTP), generating a mixture with a concentration of solids of less than 30% which is conditioned to a concentration of less than 20%; and (c) a step of wet anaerobic digestion in a digester at between 25° C. and 40° C. or between 50° ° C. and 60° C. and during an HRT of between 12 and 30 days, generating biogas and a digestate.

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First Claim