METHOD FOR REMOVING BORON FROM WATER TO BE TREATED, BORON REMOVAL SYSTEM, ULTRAPURE WATER PRODUCTION SYSTEM, AND METHOD FOR MEASURING BORON CONCENTRATION

WIPO Patent Application WO/2019/244443

A1

Provided is a method for removing boron from water to be treated, the method including: a step for subjecting the water to be treated to a reverse osmosis membrane treatment; a step for subjecting at least a portion of permeated water after the reverse osmosis membrane treatment to a step for removing cations; and a step for measuring the boron concentration in the permeated water after the process for removing the cations, wherein at least one among the following (a)-(e) is controlled on the basis of the measured value of the boron concentration: (a) the recovery rate of the water being treated in the reverse osmosis membrane treatment; (b) the temperature of the water to be treated; (c) the pH of the water to be treated; (d) the supply pressure of the water to be treated, which is applied to the reverse osmosis membrane of the reverse osmosis membrane treatment; and (e) the replacement timing of the reverse osmosis membrane used for the reverse osmosis membrane treatment.

NAKAMURA YUKI (JP)
KEMMOCHI CHIKA (JP)

PCT/JP2019/015130

December 26, 2019

April 05, 2019

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ORGANO CORP (JP)

C02F1/44; B01D61/02; B01D61/12; B01D61/44; B01D61/58; B01J39/05; B01J39/18; B01J41/05; B01J41/12; B01J47/022; B01J47/04; B01J47/127; B01J49/53; C02F1/20; C02F1/42; C02F1/469

JP2005342587A	2005-12-15
JP2014100706A	2014-06-05
JPH11128921A	1999-05-18
JP2018058018A	2018-04-12
JPH08117744A	1996-05-14
JPH09290275A	1997-11-11

IIDA & PARTNERS et al. (JP)

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