| 摘要 |
PROBLEM TO BE SOLVED: To provide an electric regeneration type pure water making apparatus constituted so as to enhance the removal efficiency of a weak electrolyte. SOLUTION: This electric regeneration type pure water making apparatus is constituted of a plurality of sets of desalting chambers (81), etc. and concentration chambers (91), etc. wherein anion exchange membranes and cation exchange membranes are alternately arranged in succession between an anode chamber equipped with an anode and a cathode chamber equipped with a cathode. Each of the desalting chambers is divided into two chambers in a liquid passing direction and an independent anion exchanger (A) is arranged in the upstream chamber while a mixture (M) of a cation exchanger and the anion exchanger is arranged in the downstream chamber and bipolar membrane (B) is arranged on the upstream side of each of the desalting chambers so that the anion exchange membrane (a) of the bipolar membrane (B) is located on the side of the anion exchanger (A). COPYRIGHT: (C)2005,JPO&NCIPI
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