Liquid purification or separation – Processes – Treatment by living organism
Patent
1994-11-08
1996-03-19
Wyse, Thomas
Liquid purification or separation
Processes
Treatment by living organism
210613, 210622, 210630, C02F 328
Patent
active
055001238
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effluent is fermented under anaerobic conditions in a methane phase digester, product gas comprising methane is withdrawn from the methane phase digester, and oxygen is introduced into the methane phase digester.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 CO.sub.2 stripper resulting in stripping of CO.sub.2 and H.sub.2 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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Institute of Gas Technology
Wyse Thomas
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