| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an electric deionized water producing apparatus (EDI) capable of achieving an energy-saving ability in operation, and further obtaining deionized water of excellent quality having a high specific resistance even in treating a large amount of water. Ž<P>SOLUTION: The EDI includes between an anode and a cathode a desalting chamber 150 having a cathode-side small desalting chamber 152 and an anode-side small desalting chamber 154 and concentrating chambers 130 on either side of the desalting chamber 150 with an anion exchange membrane 146 or a cation exchange membrane 142 in between. The anode-side small desalting chamber 154 is filled with an ion exchanger containing an anion exchanger 155 and the cathode-side small desalting chamber 152 with a mixed bed of a cation exchanger 151 and an anion exchanger containing a low-basic anion exchanger 153. A means is provided for supplying water having flowed through the cathode-side small desalting chamber 152 to the anode-side small desalting chamber 154. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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