Title:
WATER TREATMENT FACILITY AND METHOD FOR OPERATING WATER TREATMENT FACILITY
Document Type and Number:
WIPO Patent Application WO/2023/210530
Kind Code:
A1
Abstract:
This water treatment facility comprises: a first membrane filtration device; a second membrane filtration device provided at a stage subsequent to the first membrane filtration device; a reservoir tank that retains a portion of permeated water that has permeated through the first membrane filtration device; a circulation flow path that is provided between the first membrane filtration device and the reservoir tank, and enables the permeated water retained in the reservoir tank to circulate between the first membrane filtration device and the reservoir tank; a pump that is provided in the circulation flow path; and a control unit that controls the pump such that after the end of washing of a filtration membrane accompanied by introduction of air into the first membrane filtration device, the permeated water retained in the reservoir tank is circulated between the first membrane filtration device and the reservoir tank through the circulation flow path.
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Inventors:
NAKAZATO HIROTOKI (JP)
Application Number:
PCT/JP2023/015951
Publication Date:
November 02, 2023
Filing Date:
April 21, 2023
Export Citation:
Assignee:
KURITA WATER IND LTD (JP)
International Classes:
B01D19/00; B01D61/58; B01D65/02; C02F1/20; C02F1/44
Domestic Patent References:
| WO2009008463A1 | 2009-01-15 | |||
| WO2013047466A1 | 2013-04-04 | |||
| WO2021065422A1 | 2021-04-08 |
Foreign References:
| JP2016022448A | 2016-02-08 | |||
| JP2016215089A | 2016-12-22 | |||
| JP2004216264A | 2004-08-05 | |||
| JP2000246069A | 2000-09-12 |
Attorney, Agent or Firm:
NISHIZAWA Kazuyoshi et al. (JP)
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