Title:
METHOD OF ADMINISTERING COAGULANT
Document Type and Number:
WIPO Patent Application WO/2022/009833
Kind Code:
A1
Abstract:
Defining one treatment cycle as comprising a filtration step J for using a filter membrane to filter water to be filtered in a filtration tank and a filtration stopping step K for stopping filtration, this method, for administering a coagulant in water treatment that involves repeating the treatment cycle C1-C5 to treat water to be treated, starts administration of the coagulant into the filtration tank when the membrane load index becomes greater than or equal to a first threshold value, wherein the membrane load index is defined as the amount of increase in intermembrane pressure per unit time in filtration step J.
Inventors:
OKAJIMA YASUNOBU (JP)
TANAKA KEN (JP)
TANAKA KEN (JP)
Application Number:
PCT/JP2021/025301
Publication Date:
January 13, 2022
Filing Date:
July 05, 2021
Export Citation:
Assignee:
KUBOTA KK (JP)
International Classes:
C02F1/44; C02F1/52
Foreign References:
| US20130056412A1 | 2013-03-07 | |||
| JP2010513009A | 2010-04-30 | |||
| JP2004290897A | 2004-10-21 | |||
| JPH04215887A | 1992-08-06 | |||
| JP2018034077A | 2018-03-08 | |||
| JP2008168199A | 2008-07-24 | |||
| JP2009233511A | 2009-10-15 | |||
| US20170209834A1 | 2017-07-27 | |||
| JPH06178979A | 1994-06-28 | |||
| JP2015163388A | 2015-09-10 |
Other References:
See also references of EP 4177223A4
Attorney, Agent or Firm:
MORIMOTO INT'L PATENT OFFICE (JP)
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