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Title:
ORGANIC WASTEWATER TREATMENT METHOD AND ORGANIC WASTEWATER TREATMENT DEVICE
Document Type and Number:
WIPO Patent Application WO/2018/186299
Kind Code:
A1
Abstract:
Provided is an organic wastewater treatment method that can efficiently perform biological treatment. For an organic wastewater treatment device provided with a biological treatment tank wherein a pair of an oxygen free tank disposed on the upstream side along the flow of organic wastewater that includes nitrogen and an aerobic tank disposed on the downstream side so as to have a membrane separation device immersed in activated sludge is a biological treatment unit and a plurality of the biological treatment units are connected in series, with a sludge return pathway for returning activated sludge to the oxygen free tank disposed most to the upstream side from the aerobic tank disposed most to the downstream side, this organic wastewater treatment method determines whether or not to stop a membrane separation device during operation for each organic treatment unit or start the membrane separation device while stopped with at least one of amount of inflow of organic wastewater, level of liquid in water tank, pressure differential between membranes of each membrane separation device, T-N of treated water, and treated water NH3-N concentration as an index.

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Inventors:
YATSUGI SOICHIRO (JP)
SUZUKI KUNIYASU (JP)
YANASE HITOSHI (JP)
ISHIHARA YUKAKO (JP)
Application Number:
PCT/JP2018/013695
Publication Date:
October 11, 2018
Filing Date:
March 30, 2018
Export Citation:
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Assignee:
KUBOTA KK (JP)
International Classes:
C02F3/34; B01D21/30; C02F3/12
Foreign References:
JP4374885B22009-12-02
JP2004148146A2004-05-27
JP2003290607A2003-10-14
JP2007222814A2007-09-06
JP2015097976A2015-05-28
JP2010089079A2010-04-22
JP2010137185A2010-06-24
JP2016182551A2016-10-20
JP2000140886A2000-05-23
JP4374885B22009-12-02
Other References:
See also references of EP 3608295A4
Attorney, Agent or Firm:
HASHIMOTO, Kaoru (JP)
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