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Title:
WASTEWATER TREATMENT SYSTEM AND TREATMENT METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2013/168680
Kind Code:
A1
Abstract:
This wastewater treatment system comprises: an anaerobic region to which wastewater that has not passed through a sedimentation tank, i.e., wastewater in which solids having a small size and a low specific gravity are contained as such without being separated therefrom as raw sludge, is supplied first; and an oxygen-free region and an aerobic region which have been consecutively formed by causing the regions to communicate with each other through the openings of a partition as channels. In the system and method, the percentage of return sludge is kept at 30-60%, the concentration of active sludge (mixed liquor suspended solid (MLSS)) is kept at 2,600-5,000 mg/L, excluding 5,000 mg/L, and the concentration of bacteria belonging to the genus Bacillus is kept at 108-1010 cells/mL.

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Inventors:
KOJIMA MAKOTO (JP)
Application Number:
PCT/JP2013/062780
Publication Date:
November 14, 2013
Filing Date:
May 02, 2013
Export Citation:
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Assignee:
KOJIMA MAKOTO (JP)
TAISEI KIGYO CO LTD (JP)
International Classes:
C02F3/34; C12N1/20
Foreign References:
JP2007105630A2007-04-26
JPS58210897A1983-12-08
JP2009131773A2009-06-18
JP2007105631A2007-04-26
JP2001314890A2001-11-13
JP2011072932A2011-04-14
JPS58183995A1983-10-27
Attorney, Agent or Firm:
WATANABE Mochitoshi et al. (JP)
Mochitoshi Watanabe (JP)
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