| 摘要 |
PROBLEM TO BE SOLVED: To provide a water treatment apparatus which is capable of stably keeping a high throughput. SOLUTION: A treated water tank 1 is partitioned to an anode chamber 3A and a cathode chamber 4A by a diaphragm 2. The diaphragm 2 is composed of a cation exchange membrane. An electrode 4 consists of an alloy which consists essentially of copper and contains a metal having higher ionization tendency than copper, such as Devarda's alloy. In the treated water tank 1, an alkaline salt is supplied from an alkaline salt supplying device 6 and, when the electrolysis of water to be treated is performed by the electrode 3 (anode) and the electrode 4 (cathode), the cathode chamber 4A becomes alkaline. Then, nitrate nitrogens in the water to be treated is reduced to ammonium ions by the electrode 4 in the alkaline solution. COPYRIGHT: (C)2004,JPO
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