公开(公告)号：US20200284742A1

公开(公告)日：2020-09-10

申请号：US16648869

申请日：2018-08-02

Applicant: ORGANO CORPORATION

Inventor： Chika KEMMOCHI ,  Koji YAMANAKA

IPC: G01N27/10 ,  C02F1/469 ,  G01N33/18

Abstract: Time until a conductivity meter is ready to measure a conductivity after an electric decationizing apparatus starts is shortened.Water to be treated that contains cations and anions is supplied to the electric decationizing apparatus while applying a first voltage to the electric decationizing apparatus, and decationized water is generated. Next, the decationized water that is generated by the electric decationizing apparatus is supplied to the conductivity meter in order to measure conductivity of the decationized water. Before the first voltage is applied to the electric decationizing apparatus and before the conductivity meter begins measuring the conductivity of the decationized water, a second voltage that is lower than the first voltage is applied to the electric decationizing apparatus in a state in which the electric decationizing apparatus is charged with water to be treated.

公开(公告)号：US20210261445A1

公开(公告)日：2021-08-26

申请号：US17252914

申请日：2019-04-05

Applicant: ORGANO CORPORATION

Inventor： Yuki NAKAMURA ,  Chika KEMMOCHI

IPC: C02F1/44 ,  C02F1/58 ,  C02F1/66 ,  C02F1/42

Abstract: A method of removing boron from water to be treated includes subjecting the water to be treated to reverse osmosis membrane treatment, subjecting at least part of permeated water after the reverse osmosis membrane treatment to cation-removing treatment, and measuring a concentration of boron in the resulting permeated water after the cation-removing treatment, in which a measured value for the concentration of boron is used to regulate at least one of: (a) the recovery rate of water to be treated in the above 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 pressure is applied to the reverse osmosis membrane during the reverse osmosis membrane treatment, and (e) when the reverse osmosis membrane used for the reverse osmosis membrane treatment should be changed.