Patent ID: 6299774
Filing Date: 2001-10-09
Classification: C02F,C05F,C12M,Y02E,Y02P,Y02W

Abstract:
An anaerobic digester system for converting cellulose-containing feedstock into useful materials, wherein the system comprises:a feedstock slurry feeder;a plurality of conduits connecting various components of the system;a single pressurizable anaerobic digester comprising agitation means, one or more feed ports, one or more discharge ports, and a reaction vessel for holding a reaction solution comprising an anaerobic microbe which converts an aqueous slurry of cellulose-containing feedstock into at least one useful gas and an enriched effluent;a pressurizer; andone or more gas processors directly or indirectly connected to the anaerobic digester;wherein the headspace of the anaerobic digester is pressurized to at least about 10 psi to form the enriched effluent and the at least one useful gas during anaerobic digestion of the cellulose-containing feedstock.