PROCESS FOR PRODUCING ENERGY, FEED MATERIAL AND FERTILIZER PRODUCTS FROM MANURE

Title:

PROCESS FOR PRODUCING ENERGY, FEED MATERIAL AND FERTILIZER PRODUCTS FROM MANURE

Document Type and Number:

WIPO Patent Application WO2003018199

Kind Code:

A3

Abstract:

A process for treating manure using anaerobic digestion includes introducing manure into a mixing vessel (14) containing a digester liquid and agitating and filtering a slurry (18) formed therefrom to remove substantially all water insoluble solids, thereby leaving a liquid containing ammonia and reactive organic materials. The liquid is routed to a heat exchanger (36) and ammonia is removed therefrom to produce a substantially ammonia-free liquid containing reactive organic materials, which is cooled and placed in a digester (58) containing anaerobic bacteria to convert the reactive organic materials in the liquid to biogas and to produce a digester liquid. The biogas is withdrawn and utilized to generate electricity, and a small amount of the digester liquid is withdrawn from the digester (58) and recycled back to the mixing vessel (14). The water insoluble solids and ammonia removed during the process may be converted to ruminant animal feed and concentrated liquid fertilizer, respectively.

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Inventors:

STAMPER KEN (US)
SKINNER RICHARD (US)

Application Number:

PCT/US2002/026530

Publication Date:

September 10, 2004

Filing Date:

August 21, 2002

Export Citation:

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Assignee:

STAMPER KEN (US)
SKINNER RICHARD (US)

International Classes:

C05F3/00; C05F17/00; C02F3/28; C02F11/18; (IPC1-7): C02F3/28; C05F3/00

Foreign References:

US4040953A	1977-08-09
US6391203B1	2002-05-21
US6368849B1	2002-04-09

Other References: