| 摘要 |
PROBLEM TO BE SOLVED: To provide a water treatment equipment for fluoride-containing waste water which can be stably operated over a long period of time. SOLUTION: The water treatment equipment for fluoride-containing waste water is provided with a first reaction tank 11 (a first reactor) where acid or alkali and a flocculant are added to the fluoride-containing waste water, a membrane separation apparatus 14 (a membrane separation means) which is installed downstream of the first reaction tank 11 and separates deposited aggregate formed by the reaction of fluorides and the flocculant from the waste water, and a circulation tank 13 installed between the first reaction tank 11 and the membrane separation apparatus 14. The waste water to which the acid or the alkali and the flocculant have been added is supplied and the separated deposited aggregate is returned to the tank 14. The water treatment equipment also has a second reaction tank (a second reactor) to which the waste water flowing out from the first reaction tank 11 is supplied, between the first reaction tank 11 and the circulation tank 13. COPYRIGHT: (C)2004,JPO
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