Title:
WATER TREATMENT METHOD AND WATER TREATMENT AGENT COMPOSITION
Document Type and Number:
WIPO Patent Application WO/2022/186013
Kind Code:
A1
Abstract:
Provided is a water treatment method with which, in a reverse osmosis membrane treatment conducted on water being treated that contains chlorine-based oxidants and/or bromine-based oxidants, or on water being treated that contains iodide ions, it is possible to suppress any deterioration in a reverse osmosis membrane and to suppress the formation of slime. This water treatment method includes a reverse osmosis membrane treatment step for obtaining concentrated water and filtered water by using a reverse osmosis membrane on water being treated, the water treatment method involving: adding, to water being treated that contains chlorine-based oxidants and/or bromine-based oxidants, 1 mol or more of iodide ions per mole of the free chlorine content and free bromine content of the water being treated; or adding, to water being treated that contains iodide ions, a chlorine-based oxidant and/or a bromine-based oxidant such that the free chlorine content and free bromine content reach 1 mol or less per mole of iodide ions in the water being treated.
Inventors:
YAMAMOTO SHOHEI (JP)
Application Number:
PCT/JP2022/007345
Publication Date:
September 09, 2022
Filing Date:
February 22, 2022
Export Citation:
Assignee:
ORGANO CORP (JP)
International Classes:
B01D61/02; B01D61/20; B01D61/58; B01D65/02; C02F1/44; C02F1/50; C02F1/70; C02F1/72; C02F1/76
Foreign References:
| JP2015186774A | 2015-10-29 | |||
| JP2015186773A | 2015-10-29 | |||
| JP2020163354A | 2020-10-08 | |||
| JP2014129978A | 2014-07-10 | |||
| JP2018008182A | 2018-01-18 | |||
| JP2020037059A | 2020-03-12 | |||
| JP2006088095A | 2006-04-06 |
Attorney, Agent or Firm:
YKI INTELLECTUAL PROPERTY ATTORNEYS (JP)
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