Anaerobic digester

Details Anaerobic digester Anaerobic digester

C - Chemistry, Metallurgy

02

F

C02F 11/04 (2006.01) C02F 3/28 (2006.01) C12M 1/107 (2006.01)

Patent

CA 2052190

ANAEROBIC DIGESTER Abstract An anaerobic digester for digesting animal manure and other biologically degradable material contains support media for enhancing the contact between the microbes in the digesting mass and the available nutrients. The digester includes a novel fluid circulation and distribution system. The distribution system prevents build up of heavy material in the bottom of the digester and prevents agglomeration of light material at the top of the digester. The digesting fluid travels over a floating weir into an intake and impeller assembly. The impeller drives the fluid through a conduit located adjacent the floor of the digester. Nozzles in the conduit project the fluid downwardly toward the floor thus causing a sweeping action on the floor. Fluid then flows upwardly past the support media. Risers are provided at the ends of the conduit, which terminate in nozzles at the surface of the digesting liquid. The nozzles direct the flow of digestingmaterial back toward the fluid inlet and also sweep the corners of the digester to prevent material accumulation. LEJ/gfb 1/UNIS-5013

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