Title:
WATER TREATMENT METHOD AND WATER TREATMENT DEVICE
Document Type and Number:
WIPO Patent Application WO/2014/108941
Kind Code:
A1
Abstract:
This water treatment method includes a first step of adding a calcium-containing inorganic substance that is insoluble in water to waste water in a reaction tank to convert fluoride ions included in the waste water to calcium fluoride, and a second step of enabling solid-liquid separation of the waste water that includes the calcium fluoride in a solid-liquid separation tank and removing the calcium fluoride from the waste water to obtain a first treated water. The method further includes a third step of adding a pH regulator to the first treated water in a pH regulating tank to regulate the acidity range of the pH in the first treated water, and a fourth step of passing the first treated water through a container filled with an aminopolyol-based chelate resin to remove by adsorption tetrafluoroborate ions from the first treated water to obtain a second treated water.
Inventors:
FUKAYA TARO (JP)
YAMAZAKI ATSUSHI (JP)
TSUTSUMI KENJI (JP)
SUZUKI AYUMI (JP)
YAMAZAKI ATSUSHI (JP)
TSUTSUMI KENJI (JP)
SUZUKI AYUMI (JP)
Application Number:
PCT/JP2013/002144
Publication Date:
July 17, 2014
Filing Date:
March 28, 2013
Export Citation:
Assignee:
TOSHIBA KK (JP)
International Classes:
C02F1/58; B01J45/00; C02F1/28; C02F1/42
Foreign References:
| JPS56113391A | 1981-09-07 | |||
| JPH0299189A | 1990-04-11 | |||
| JP2000334470A | 2000-12-05 |
Attorney, Agent or Firm:
SAKURA PATENT OFFICE, p. c. (JP)
Patent business corporation cherry tree international patent firm (JP)
Patent business corporation cherry tree international patent firm (JP)
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