| 摘要 |
PROBLEM TO BE SOLVED: To provide a water treatment method for achieving enhancement in the use efficiency of treatment ozone, furthermore, enhancement in system efficiency and cost reduction while keeping a high-degree membrane filtering treatment capacity, and an apparatus therefor. SOLUTION: In the water treatment method using a membrane module 5 for filtering water, and the apparatus therefor, water 1 to be treated is subjected to membrane filtration after treated with ozone and, further, the membrane module is washed using ozone-containing water or an ozone gas. The treatment of the water to be treated with ozone is performed by mixing the water to be treated supplied from a raw water tank 2 with ozone generated by an ozone generator 7 using an ejector 4. The ozone-containing water for washing the membrane module is produced, for example, by mixing membrane filtered water 6 with ozone generated by the ozone generator 7 in a backwashing water tank 10. COPYRIGHT: (C)2004,JPO
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