US 7,320,753 B2 | ||
Anaerobic digester system for animal waste stabilization and biogas recovery | ||
Kurt Frederich Roos, Dumfries, Va. (US) | ||
Assigned to The United States of America as represented by the United States Environmental Protection Agency, Washington, D.C. (US) | ||
Filed on Mar. 05, 2007, as Appl. No. 11/682,086. | ||
Application 11/682086 is a continuation of application No. 11/381967, filed on May 05, 2006, granted, now 7,186,339, filed on Mar. 06, 2007. | ||
Prior Publication US 2007/0256971 A1, Nov. 08, 2007 | ||
Int. Cl. C02F 3/28 (2006.01) |
U.S. Cl. 210—603 [210/916; 435/262.5] | 15 Claims |
1. A method for anaerobically digesting dilute animal waste with biogas production, comprising the steps of:
Conveying dilute animal waste containing through one or more waste inlets in a substantially flexible bladder;
Maintaining the dilute animal waste in the substantially flexible bladder at an average ambient temperature of 65 degrees
Fahrenheit or greater for a period of time for digestion of the dilute animal waste;
Removing digester effluent from the substantially flexible bladder through one or more digester effluent outlets in the substantially
flexible bladder;
Providing a displacement tank in fluid communication with at least one of the one or more digester effluent outlets; and
Storing biogas within the substantially flexible bladder by displacing animal waste therein through the at least one of the
one or more digester effluent outlets into the displacement tank.
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