Title:
逆浸透膜を用いる水処理方法
Document Type and Number:
Japanese Patent JP6970516
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a water treatment method and a water treatment system using a reverse osmosis membrane which has a slime inhibition effect of a reverse osmosis membrane and inhibits decrease of the amount of permeated water, in a water treatment using a reverse osmosis membrane that makes water to be treated containing biologically treated water flow through a reverse osmosis membrane to obtain treated water and concentrated water.SOLUTION: A water treatment method using a reverse osmosis membrane and a water treatment system 1 using a reverse osmosis membrane: makes water to be treated containing biologically treated water flow through a reverse osmosis membrane to obtain treated water and concentrated water; and makes a stabilized hypobromous acid composition containing a bromine-based oxidant and a sulfamic acid compound be present in the water to be treated so that free chlorine concentration in the water to be treated or in the concentrated water becomes 0.05 mg/L or higher.SELECTED DRAWING: Figure 1
Inventors:
Kengo Kawahara
Application Number:
JP2017052287A
Publication Date:
November 24, 2021
Filing Date:
March 17, 2017
Export Citation:
Assignee:
Organo Corporation
International Classes:
C02F1/44; C02F1/50; C02F1/76
Domestic Patent References:
| JP2016120466A | ||||
| JP2006263510A | ||||
| JP2016538119A | ||||
| JP2016155074A | ||||
| JP2016120457A | ||||
| JP2016155067A | ||||
| JP5329477A | ||||
| JP2016120467A |
Attorney, Agent or Firm:
Patent Corporation yki International Patent Office