Title:
METHOD FOR OPERATING REVERSE OSMOSIS MEMBRANE DEVICE
Document Type and Number:
WIPO Patent Application WO/2022/209461
Kind Code:
A1
Abstract:
The present invention provides a technique with which a water system having a reverse osmosis membrane device can be stably operated over a longer period of time. The present invention can provide a method for operating a reverse osmosis membrane device, the method comprising: a first step for intermittently adding an oxidation-based slime inhibitor and intermittently supplying water to be treated containing the oxidation-based slime inhibitor to a reverse osmosis membrane device; and a second step for adding an organic-based slime inhibitor at least during a period other than the addition period of the first step and supplying the water to be treated containing the organic-based slime inhibitor to the reverse osmosis membrane device.
Inventors:
NAKATA KOJI (JP)
TAKAHASHI JUNICHI (JP)
TAKAHASHI JUNICHI (JP)
Application Number:
PCT/JP2022/007588
Publication Date:
October 06, 2022
Filing Date:
February 24, 2022
Export Citation:
Assignee:
KURITA WATER IND LTD (JP)
International Classes:
C02F1/44; B01D61/04; B01D65/02; B01D65/06; C02F1/50
Domestic Patent References:
| WO2011125762A1 | 2011-10-13 |
Foreign References:
| JP2018114473A | 2018-07-26 | |||
| JP2020054969A | 2020-04-09 | |||
| JP2020028865A | 2020-02-27 | |||
| JP2009247992A | 2009-10-29 | |||
| JP2020028865A | 2020-02-27 | |||
| JP5720964B2 | 2015-05-20 |
Other References:
J. S. VROUWENVELDER: "Biofouling of Spiral Wound Membrane Systems", 2011, IWA PUBLISHING
Attorney, Agent or Firm:
WATANABE Kaoru (JP)
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