Patent ID: 7699968

Claim:
A water purifying system consisting essentially of; a reverse osmosis membrane apparatus, an electrodeionization apparatus consisting of an electrode compartment, a desalting compartment, and a concentrating compartment, and a boron absorptive apparatus, wherein these apparatuses are connected so that desalted water from the reverse osmosis membrane apparatus is fed through the boron absorptive apparatus and then fed to the electrode compartment and the desalting compartment of the electrodeionization apparatus and water from the desalting compartment is partially obtained as so as to produce pure water and partially fed to the concentrating compartment, and the boron absorptive apparatus is filled with absorptive agent of boron absorptive resin, an amount of TOC eluting from the absorptive agent is 0.8 mg or less per 1 liter volume of the absorptive agent per 1 hour at a point of 1/10 of the entire feeding water time from a start to a point of regenerating or exchanging the absorptive agent in the boron absorptive apparatus.