| 摘要 |
PURPOSE:To conserve power consumption, by connecting a plurality of apparatus units each consisting of an ultraviolet ray irradiation apparatus and an ion exchange apparatus in series. CONSTITUTION:Raw water is introduced into a first ultraviolet ray irradiation apparatus 11a and irradiated with ultraviolet rays to oxidize the greater part of the org. substance therein to an org. acid. The treated water is introduced into a first ion exchange apparatus 12a to remove the org. acid and subsequently passes through a second ultraviolet ray irradiation apparatus 11b and a second iron exchange apparatus 12b or treated plural times by these apparatuses to perfectly remove the org. substance, to obtain pure water with high purity.
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