| 摘要 |
PROBLEM TO BE SOLVED: To provide a washing method of a water treatment facility suppressing cost for chemical washing such as chemical cost, neutralizing cost or industrial waste treatment cost, and increasing a ratio of produced water amount (recovery ratio) obtained from raw water feed amount, by reducing the disposal amount of washing drain or the used amount of chemical in respective water treatment processes of treating two different kinds of raw water. SOLUTION: The water treatment facility includes: a first semipermeable membrane treatment facility 1 separating treating object water A into permeated water A and concentrated water A; a chemical injection facility A3 injecting the chemical for washing the first semipermeable membrane treatment facility 1; and a turbidity removing facility 2 obtaining treated water from treating object water B, the raw water different from the treating object water A. Washing drain generated in the washing process of the first semipermeable membrane treatment facility 1 is used for chemical washing of the turbidity removing facility 2. COPYRIGHT: (C)2011,JPO&INPIT
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