REFINED WATER MAKING METHOD BY REVERSE OSMOSIS MODULE AND REFINED WATER MAKING APPARATUS EMPLOYING THE METHOD

摘要

PROBLEM TO BE SOLVED: To provide a refined water making method due to a reverse osmosis membrane module having a sterilization and disinfection function for keeping refined water cleanness and excellent in operability, ecconomical efficiency and safety, and a refined water making apparatus.;SOLUTION: In the refined water making method for feeding pretreated raw water, which is treated in a pretreatment part for removing residual chlorine in raw water, to the reverse osmosis membrane module under pressure and separating the same into refined water and concentrated water by a reverse osmosis membrane, a heating device for making high temperature water with a temperature of 60 to 75°C is provided and the high temprature water made by the heating device is supplied to the membrane separation module part. Further, branch pipelines communicating with the refined water pipeline and concentrated water pipeline of the membrane separation module part through the heating device are provided and the high temperature water supplied to the membrane separation module part is recovered/circulated to the heating device through the branch pipelines to disinfect the reverse osmosis membrane module.;COPYRIGHT: (C)2004,JPO