Title:
METHOD FOR WASHING HOLLOW FIBER MEMBRANE MODULE
Document Type and Number:
WIPO Patent Application WO/2022/114222
Kind Code:
A1
Abstract:
Provided is a method for washing a hollow fiber membrane module which comprises a hollow fiber membrane for filtering raw water containing a suspended component, said method comprising, in the following order, a first washing step for removing a suspended component that is accumulated on the hollow fiber membrane and a second washing step for carrying out an air scrubbing process in which gas is caused to pass through at least to the raw water side of the hollow fiber membrane, wherein, out of water that existed in the hollow fiber membrane module before washing, water in an amount corresponding to not less than 50 vol% of the capacity of the hollow fiber membrane module is removed in the first washing step.
Inventors:
OKAMURA DAISUKE (JP)
GOJO YUTAKA (JP)
KIMURA YUJI (JP)
GOJO YUTAKA (JP)
KIMURA YUJI (JP)
Application Number:
PCT/JP2021/043885
Publication Date:
June 02, 2022
Filing Date:
November 30, 2021
Export Citation:
Assignee:
ASAHI CHEMICAL IND (JP)
International Classes:
B01D61/14; B01D63/02; B01D65/02; B01D69/08; C02F1/44
Domestic Patent References:
| WO2017115769A1 | 2017-07-06 |
Foreign References:
| JP2007289940A | 2007-11-08 | |||
| JP3948593B2 | 2007-07-25 | |||
| JP2015083309A | 2015-04-30 | |||
| JP2011056340A | 2011-03-24 | |||
| JP2006231264A | 2006-09-07 |
Attorney, Agent or Firm:
AOKI, Atsushi et al. (JP)
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