Electrodeionization apparatus

摘要

An electrodeionization apparatus in which enough electric current flows even when a low voltage is applied, so that it can made sufficient deionizing treatment is provided. A cation exchange membrane 3 and an anion exchange membrane 4 are arranged between a cathode 1 and an anode 2, a cathode-concentration compartment 5 is formed between the cathode 1 and the cation exchange membrane 3, an anode-concentration compartment 6 is formed between the anode 2 and the anion exchange membrane, and a desalting compartment 7 is formed between the cation exchange membrane 3 and the anion exchange membrane 4. The cathode-concentration compartment 5 and the anode-concentration compartment 6 each of which is used also as a concentrating compartment are filled with a cation exchange resin 8. The desalting compartment 7 is filled with a mixture of the cation exchange membrane 8 and an anion exchange membrane 9. Raw water is fed into the desalting compartment 7 and taken out as deionized water. Electrode water was fed into the compartments 5 and 6, respectively. <IMAGE>