Abstract: Surfactants present in waste water to be treated are adsorbed and removed on a salt-form ion exchange resin by passing the water to be treated with the surfactants and other organic materials through an ion exchange apparatus using the salt-form ion exchange resin, with the waste water to be treated being generated from using high-purity water. The organic matter remaining in the treated water of the ion exchange apparatus is oxidized and decomposed by an organic matter oxidizing device. The obtained treated water is supplied to the high-purity water producing apparatus for recovery and reuse.

Abstract: A high-purity water producing apparatus has an excellent effect of environmental protection and is also capable of effectively removing boron. It comprises a pretreatment unit, and a double pass RO unit an EDI unit or a distillation unit or any combination thereof as principal deionization unit(s) but does not comprise any chemical-regeneration type ion exchanger. It further comprises a boron removing unit and the water treated by the principal deionization unit(s) is brought into contact with a boron-selective ion exchange resin.

Abstract: A deionized or high purity water producing method is describing wherein ions and non-ionic substances are removed. The method includes pretreating feed water to remove suspended non-ionic substances, containing the pretreated water with first and second ion exchange resins that include a boron selective ion exchange resin, and stratifying or mixing together the first and second resins within an ion exchange column. The boron selective ion exchange resin is included to remove boron ions contained in the pretreated water.