METHOD FOR PREVENTING GENERATION OF SCALE IN REVERSE OSMOSIS MEMBRANE TREATMENT AND SCALE INHIBITOR FOR REVERSE OSMOSIS MEMBRANE TREATMENT

摘要

PROBLEM TO BE SOLVED: To provide a new technique which does not require a large amount of a scale inhibitor even under a high pH condition in a method for preventing generation of scales in reverse osmosis membrane treatment.;SOLUTION: In a method for preventing generation of scales in reverse osmosis membrane treatment, after a first scale inhibitor addition step of adding a water-soluble organic phosphonate to water to be treated and a second scale inhibitor addition step of adding triethanolamine to the water to be treated are performed in random order, the water to be treated having a pH of 9 or more is subjected to reverse osmosis membrane treatment.;COPYRIGHT: (C)2014,JPO&INPIT