04491522 is referenced by 73 patents and cites 9 patents.

The present invention relates to an anaerobic digestion process for organic wastes with a high efficiency and an improved recovery rate of methane.

This process comprises the following steps: (1) anaerobically digesting organic wastes under simultaneous presence of facultative anaerobic bacteria and obligatory anaerobic bacteria, (2) separating the anaerobically digested slurry obtained from the step (1) into a liquor fraction containing the two groups of bacteria and an undecomposed solid fraction, (3) mixing the liquor fraction obtained from the step (2) with the surplus activated sludge slurry produced by anaerobically treating organic waste water, under anaerobic condition, (4) separating the mixed slurry obtained from the step (3) into a solid fraction containing the surplus activated sludge which has absorbed the two groups of bacteria and a liquor fraction, and recycling back the solid fraction obtained from the step (4) as the sources of the two groups of bacteria and nitrogen to the step (1).

Title
Anaerobic digestion process for organic wastes
Application Number
6/551730
Publication Number
4491522
Application Date
November 15, 1983
Publication Date
January 1, 1985
Inventor
Yoji Odawara
Hitachi
JP
Tadashi Ishibashi
Hitachi
JP
Ryoichi Haga
Hitachi
JP
Masahiko Ishida
Hitachi
JP
Agent
Birch Stewart Kolasch & Birch
Assignee
Agency of Industrial Science & Technology
JP
IPC
C02F 3/30
C02F 3/28
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