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Title:
REVERSE OSMOSIS MEMBRANE SEPARATION METHOD AND ANTI-FOULING AGENT FOR REVERSE OSMOSIS MEMBRANE
Document Type and Number:
WIPO Patent Application WO/2019/138880
Kind Code:
A1
Abstract:
The present invention aims to provide a method and a chemical agent whereby a reverse osmosis membrane can be stabilized and operated over the long term, even for treatment water that contains organic matter. In this reverse osmosis membrane separation method: treatment water that includes organic matter is passed through a treatment system having a reverse osmosis membrane; and the treatment water undergoes membrane separation treatment using the reverse osmosis membrane. Polyvinyl alcohol and a phosphorus compound are used in the treatment water prior to the membrane separation treatment.

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Inventors:
ISHII JUNYA (JP)
FUJII AKIHIRO (JP)
Application Number:
PCT/JP2018/047850
Publication Date:
July 18, 2019
Filing Date:
December 26, 2018
Export Citation:
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Assignee:
KURITA WATER IND LTD (JP)
International Classes:
C02F1/44; B01D61/02; B01D65/08; C02F5/00; C02F5/08; C02F5/14
Domestic Patent References:
WO2019004320A12019-01-03
Foreign References:
JP2014144393A2014-08-14
JP2014144394A2014-08-14
JPS5113388A1976-02-02
JP2007090288A2007-04-12
JP2012213686A2012-11-08
Attorney, Agent or Firm:
WATANABE Kaoru (JP)
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