Title:
WASTEWATER CONCENTRATION DEVICE AND CONCENTRATION METHOD
Document Type and Number:
WIPO Patent Application WO/2024/075532
Kind Code:
A1
Abstract:
This wastewater concentration device and method comprise: an osmotically assisted reverse osmosis device that has a primary chamber and a secondary chamber which are separated by an osmotically assisted reverse osmosis membrane and that performs an osmotically assisted reverse osmosis method; and a water supply means for supplying to-be-treated water to the primary chamber. The water supply means uses a cation exchange device or an anion exchange device to treat at least a portion of the to-be-treated water so that the pH of the to-be-treated water to be supplied to the osmotically assisted reverse osmosis device ranges from a first prescribed pH to a second prescribed pH (where the first prescribed pH is an alkaline pH, and the second prescribed pH is the pH of an acidic pH).
Inventors:
KAWAKATSU TAKAHIRO (JP)
KUMAGAI KAZUO (JP)
MATSUYAMA HIDETO (JP)
KUMAGAI KAZUO (JP)
MATSUYAMA HIDETO (JP)
Application Number:
PCT/JP2023/034271
Publication Date:
April 11, 2024
Filing Date:
September 21, 2023
Export Citation:
Assignee:
KURITA WATER IND LTD (JP)
UNIV KOBE NAT UNIV CORP (JP)
UNIV KOBE NAT UNIV CORP (JP)
International Classes:
B01D61/10; B01D71/16; C02F1/42; C02F1/44
Foreign References:
| JP2022011711A | 2022-01-17 | |||
| JP2019504763A | 2019-02-21 | |||
| JP2019188330A | 2019-10-31 | |||
| JP2018515340A | 2018-06-14 | |||
| JPH05169061A | 1993-07-09 |
Attorney, Agent or Firm:
SHIGENO, Tsuyoshi et al. (JP)
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