Title:
WATER TREATMENT METHOD
Document Type and Number:
Japanese Patent JP2015054274
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To remove, both efficiently and effectively from an effluent including, as fluorine-containing substances, fluorine ions and tetrafluoroborate ions, these fluorine ions and tetrafluoroborate ions.SOLUTION: The water treatment method of an embodiment includes a first step of obtaining a body of primarily treated water by introducing, into a reaction tank, an effluent including fluorine ions and tetrafluoroborate ions and removing the fluorine ions from the effluent and a second step of adjusting the pH of the primarily treated water within a range of 2.5-5 by introducing the primarily treated water into a pH adjusting tank and adding a pH adjuster to the primarily treated water. This method additionally includes a third step of obtaining a body of secondarily treated water by permeating, through a resin column filled with an aminopolyol-type chelate resin, the pH-adjusted primarily treated water and adsorbing and removing the tetrafluoroborate ions included within the primarily treated water.
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Inventors:
YAMAZAKI ATSUSHI
FUKAYA TARO
TAHARA TOSHIO
FUKAYA TARO
TAHARA TOSHIO
Application Number:
JP2013188043A
Publication Date:
March 23, 2015
Filing Date:
September 11, 2013
Export Citation:
Assignee:
TOSHIBA CORP
International Classes:
C02F1/42; B01J49/00; C02F1/58
Attorney, Agent or Firm:
Patent business corporation cherry tree international patent firm