| 摘要 |
An electrodeionization apparatus in which enough electric current flows even when the voltage applied between the electrodes is low, thereby sufficiently performing deionization is provided. A single first cation exchange membrane 3 , a single anion exchange membrane 4 , a single second cation exchange membrane 3 ' are arranged between a cathode 1 and an anode 2 so that a concentration-cathode compartment 5 , a desalting compartment 7 , a concentrating compartment 10 , and an anode compartment 6 are formed, in this order, between the cathode 1 and the anode 2 . The concentration-cathode compartment 5 and the anode compartment 6 are filled with a cation exchange resin 8 , respectively. The desalting compartment 7 is filled with a mixture of the cation exchange resin 8 and an anion exchange resin 9 . Fed into the anode compartment 6 is raw water or deionized water. Water from the anode compartment is sent to the concentrating compartment 10 and the concentration-cathode compartment 5 sequentially.
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