Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
METHOD FOR TREATING REVERSE OSMOSIS MEMBRANE, METHOD FOR SUPPRESSING AQUEOUS BIOFOULING, AND APPARATUS FOR SUPPRESSING AQUEOUS BIOFOULING
Document Type and Number:
WIPO Patent Application WO/2019/208405
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide a technique for reducing the concentration of free halogens as much as possible in water being treated, even when a halogen-based oxidant and a stabilizer are used in a water treatment system. Provided are: a method for adding a reaction solution to water being treated and treating the water being treated, with a reverse osmosis membrane, wherein the reaction solution is obtained by producing a combined halogen by reacting a stabilizer and a halogen-based oxidant such that the total concentration of residual halogen is at least 100 mg-Cl2/L as the total chlorine concentration; and an apparatus for producing a reaction solution containing a combined halogen, the apparatus comprising a generation unit for reacting a stabilizer and a halogen-based oxidant to generate a reaction solution containing a combined halogen, and a control unit for adjusting the stabilizer and the halogen-based oxidant such that the total concentration of residual halogen in the reaction solution is at least 100 mg-Cl2/L as the total chlorine concentration. Preferably, the reaction solution is a reaction solution for suppressing reverse osmosis membrane fouling or a reaction solution for suppressing aqueous biofouling.

Inventors:
OHTSUKA Yuta (10-1 Nakano 4-chome, Nakano-k, Tokyo 01, 〒1640001, JP)
YODA Katsuro (10-1 Nakano 4-chome, Nakano-k, Tokyo 01, 〒1640001, JP)
Application Number:
JP2019/016730
Publication Date:
October 31, 2019
Filing Date:
April 19, 2019
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
KURITA WATER INDUSTRIES LTD. (10-1, Nakano 4-chome Nakano-k, Tokyo 01, 〒1640001, JP)
International Classes:
C02F1/44; B01D61/08; B01D65/08; C02F1/50
Foreign References:
JP2013010718A2013-01-17
JP2006263510A2006-10-05
JP2003267811A2003-09-25
JP2003146817A2003-05-21
Attorney, Agent or Firm:
WATANABE Kaoru (KUNPU INTELLECTUAL PROPERTY AGENTS, SUCCESS-SENGAKUJI BLDG. 3F 2-20-29, Takanawa, Minato-k, Tokyo 74, 〒1080074, JP)
Download PDF:



 
Previous Patent: POLYAMIDE MONOFILAMENT

Next Patent: POWER CONVERSION DEVICE