| 摘要 |
PROBLEM TO BE SOLVED: To provide a operation control method and device capable of easily monitoring treated water quality and facilitating the replacement or regeneration of a packed material without delay. SOLUTION: A the time of operating the adsorption columns 1, 2 and 3 in which the liq. to be treated containing plural subject material to be removed such as fluorine and arsenic is circulated, the subject material to be removed such as fluorine which reaches most rapidly to the upper limit to which breakthrough to treated water is permitted is previously selected. The liq. to be treated is circulated to the adsorption columns 1 and 2, and only the concn. of the selected subject material to be removed in the treated water is watched by fluorine concentration meter 16, etc., and at the time when the concn. reaches the upper limit concn., the packed material such as activated alumina 4 in the adsorption column 1 is exchanged or regenerated, and also the flow passage of the liq. to be treated is switched to the columns 2 and 3.
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