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Title:
WATER TREATMENT METHOD AND WATER TREATMENT APPARATUS
Document Type and Number:
WIPO Patent Application WO/2019/208532
Kind Code:
A1
Abstract:
A water treatment method in which an inorganic flocculant is added to water of interest to perform a flocculation treatment of the water and then the water is subjected to membrane separation using a membrane separation apparatus, wherein the inorganic flocculant is added to the water, then the flocculation treatment is performed by adding a water-soluble cationic polymer having a mass average molecular weight of 100,000 to 8,000,000 to the water, and then the water that has undergone the flocculation treatment is directly subjected to membrane separation using a membrane separation apparatus.

Inventors:
IWAMI TAKAKO (JP)
Application Number:
PCT/JP2019/017115
Publication Date:
October 31, 2019
Filing Date:
April 23, 2019
Export Citation:
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Assignee:
KURITA WATER IND LTD (JP)
International Classes:
B01D21/01; B01D61/58; C02F1/44; C02F1/56; C08K3/10; C08L33/00
Domestic Patent References:
WO2015045093A12015-04-02
WO2009020157A12009-02-12
WO2017130456A12017-08-03
WO2014103860A12014-07-03
Foreign References:
JPH10180008A1998-07-07
US6416668B12002-07-09
Attorney, Agent or Firm:
SHIGENO, Tsuyoshi et al. (JP)
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