| 摘要 |
PROBLEM TO BE SOLVED: To supply treated water having a predetermined treated water quality even if deterioration of the water quality of treating water or performance lowering of an ultraviolet irradiation device occurs. SOLUTION: The water treatment apparatus forms a circulation path 5 that includes a circulation tank 3, an oxidation means 1 including an oxidant feed device 9 and the ultraviolet irradiation device 10, and a pump 4. The apparatus includes a control means 18 repeatedly performing a water feed process to the circulation tank 3, a circulation process of operating the oxidation means 1 and pump 4 and circulating the treating water in the circulation path 5 after the water feed process, and a water sending process of sending the treated water in the circulation tank 3 to a treated water tank 8 after the circulation process; and a sensor 17 detecting an organic matter concentration of the treated water in the circulation path 5. The control means 18 shifts the circulation process to the water sending process when the organic matter concentration detected by the sensor 17 is lowered below a set value. COPYRIGHT: (C)2011,JPO&INPIT
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