Title:
METHOD FOR SUPPRESSING SLIME IN REVERSE OSMOSIS MEMBRANE APPARATUS
Document Type and Number:
WIPO Patent Application WO/2020/040251
Kind Code:
A1
Abstract:
Provided is a method for suppressing slime in a reverse osmosis membrane apparatus, the method achieving the advantageous effect of suppressing generation of slime (a biofilm) and by which the advantageous effect of removing slime (a biofilm) can be achieved in a short time even if slime (a biofilm) is generated and adheres to a surface of a reverse osmosis membrane. This method for suppressing slime is used in a reverse osmosis membrane apparatus and has a water-passing step for passing water to be treated through the reverse osmosis membrane. The water-passing step includes a first water-passing step in which a slime suppressing agent X which contains 2,2-dibromo-3-nitrilopropionamide (DBNPA) and a slime suppressing agent Y which contains at least one type selected from the group consisting of components (A) to (D) (which are as described in the description) are added to the water to be treated which has a pH of 10 or less, and the water to be treated, which contains the slime suppressing agent X and the slime suppressing agent Y, is passed through the reverse osmosis membrane.
Inventors:
ENDO YOSHIHIKO (JP)
Application Number:
PCT/JP2019/032827
Publication Date:
February 27, 2020
Filing Date:
August 22, 2019
Export Citation:
Assignee:
KURITA WATER IND LTD (JP)
International Classes:
C02F1/44; A01N35/02; A01N37/34; A01N41/08; A01N43/80; A01N59/00; A01N59/08; A01P3/00; B01D61/04; C02F1/50
Domestic Patent References:
| WO2016194443A1 | 2016-12-08 |
Foreign References:
| JP2018114471A | 2018-07-26 | |||
| JP2012527350A | 2012-11-08 | |||
| JP2018114473A | 2018-07-26 | |||
| JPH01104310A | 1989-04-21 | |||
| JP2009247992A | 2009-10-29 | |||
| JP2013240762A | 2013-12-05 | |||
| JP2015199020A | 2015-11-12 | |||
| JP2002320968A | 2002-11-05 |
Attorney, Agent or Firm:
OHTANI PATENT OFFICE (JP)
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