Title:
FIXED-FILM ANAEROBIC DIGESTION OF FLUSHED MANURE
Document Type and Number:
WIPO Patent Application WO2003035558
Kind Code:
A3
Abstract:
An apparatus (10) for the fixed-film anaerobic digestion of flushed livestock manure includes an enclosed digester tank (20) (fixed or flexible roof), internal media (34) for biofilm development, a biogas collection and flare system, various pumps, and hydraulic control systems. The preferred media has substantially vertically-oriented, uninterrupted channels to promote enhanced bacterial attachment and biofilm development. The immobilization of microbial biomass within the reactor as a biofilm allows effective treatment of the wastewater at ambient and higher temperatures, as well as reasonable hydraulic retention times. The composition and concentration of bacterial groups in the biofilm developed on the media in the fixed-film digester result in a significantly enhanced anaerobic degradation process. This novel fixed-film digester design expands the potential application of anaerobic digestion to dilute livestock waste with significant levels of suspended solids. This holistic manure treatment system not only stabilizes the wastewater but also produces energy (biogas ), controls odors, reduces pathogens, minimizes environmental impact from waste emissions, and maximizes fertilizer and water recovery for reuse.
Inventors:
WILKIE ANN C (US)
Application Number:
PCT/US2002/034020
Publication Date:
September 25, 2003
Filing Date:
October 23, 2002
Export Citation:
Assignee:
UNIV FLORIDA (US)
WILKIE ANN C (US)
WILKIE ANN C (US)
International Classes:
C02F3/10; C02F3/28; C02F11/04; (IPC1-7): C02F3/28; C02F3/10; C02F3/06
Foreign References:
| US4561974A | 1985-12-31 | |||
| US3402103A | 1968-09-17 | |||
| US4530762A | 1985-07-23 | |||
| US4632758A | 1986-12-30 |
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