| 摘要 |
PROBLEM TO BE SOLVED: To stably and certainly obtain treated water of high quality by improving the packed state of an ion exchanger in the desalting chamber of an electric deionizing apparatus. SOLUTION: The desalting chamber of an electric deionizing apparatus is packed with an ion exchanger so that the volume of the ion exchanger at a time of the passage of water becomes 101-120% of the volume the desalting chamber.
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