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 Title: |
US5500123:
Two-phase anaerobic digestion of carbonaceous organic materials
[ Derwent Title ]
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| Country: |
US United States of America
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| Inventor: |
Srivastava, Vipul J.; Woodridge, IL
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| Assignee: |
Institute of Gas Technology, DesPlaines, IL
other patents from INSTITUTE OF GAS TECHNOLOGY (275350) (approx. 321)
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| Published / Filed: |
1996-03-19
/ 1994-11-08
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| Application Number: |
US1994000336332
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| IPC Code: |
Advanced:
C02F 3/28;
Core:
more...
IPC-7:
C02F 3/28;
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| ECLA Code: |
C02F3/28; C02F3/28A;
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| U.S. Class: |
Current:
210/603;
210/613;
210/622;
210/630;
Original:
210/603;
210/613;
210/622;
210/630;
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| Field of Search: |
210/603,605,607,609,613,620,622,630,631,912
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| Priority Number: |
| 1994-11-08 |
US1994000336332 |
| 1993-12-28 |
US1993000174958 |
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| Abstract: |
A process for improved methane production by two-phase anaerobic digestion of organic carbonaceous material in which organic carbonaceous material is fermented under anaerobic conditions in an acid phase digester, forming a liquid/solids effluent, the liquid/solids effluent is fermented under anaerobic conditions in a methane phase digester, product gas comprising methane is withdrawn from the methane phase digester, and oxygen is introduced into the methane phase digester. In a preferred embodiment, the methane phase liquid effluent is passed through a CO2 stripper resulting in stripping of CO2 and H2 S from the methane phase liquid effluent. The resulting stripper liquid effluent comprising dissolved oxygen is then recycled back to the methane phase digester.
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| Attorney, Agent or Firm: |
Speckman, Pauley & Fejer ;
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| Primary / Asst. Examiners: |
Wyse, Thomas;
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| Maintenance Status: |
E3 Expired Check current status
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| INPADOC Legal Status: |
Show legal status actions
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| Foreign References: |
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| Other Abstract Info: |
CHEMABS 123(12)152038Q
DERABS C95-246308
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| Other References: |
Chynoweth, D. P. et al., "Biological Assessments of Anaerobic Digestion of Municipal Solid Waste", final report submitted to the Solar Energy Research Institute under U.S. DOE Contract No. DE-AC02-83CH10093, May 1991.
Srivastava, Vipul J. et al., "Methane Enrichment Digestion Experiments at the Anaerobic Experimental Test Unit at Walt Disney World", Final Report, Jun. 1993.
Chynoweth, David P. et al., "Microbial Production of Road Salt (Calcium Magnesium Acetate) From Biomass", A Proposal submitted to Minnesota Gas Company, Sep. 1983.
Pohland, F. G. et al., "Developments in Anaerobic Treatment Processes", Bio-Technology and Bio-Engineering, Symposium No. 2,85-106, John Wiley & Sons, Inc., 1971.
Pohland, F. G. et al., "Developments in Anaerobic Stabilization of Organic Wastes--The Two-Phase Concept", Environmental Letters, 1(4), pp. 255-266, Marcel Dekker, Inc., 1971.
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