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1. (WO2017175657) WATER TREATMENT METHOD AND WATER TREATMENT DEVICE

Pub. No.:    WO/2017/175657    International Application No.:    PCT/JP2017/013212
Publication Date: Fri Oct 13 01:59:59 CEST 2017 International Filing Date: Fri Mar 31 01:59:59 CEST 2017
IPC: C02F 1/44
B01D 65/08
B01D 71/56
C02F 1/70
C02F 1/76
C02F 5/08
C02F 5/10
C02F 5/12
C02F 5/14
Applicants: TORAY INDUSTRIES, INC.
東レ株式会社
Inventors: MAEDA Tomohiro
前田 智宏
TANIGUCHI Masahide
谷口 雅英
SAITO Kenji
斉藤 賢司
Title: WATER TREATMENT METHOD AND WATER TREATMENT DEVICE
Abstract:
The present invention pertains to a water treatment method in which raw water or water obtained by pretreating the raw water is supplied as supply water under pressure to a semi-permeable membrane module by a boost pump and the supply water is separated into concentrated water and permeated water, wherein the water treatment method is characterized in that a scale inhibitor is added to the supply water before a reduction agent is added to the supply water or within 0-60 seconds of the reduction agent being added to the supply water.