| 摘要 |
PROBLEM TO BE SOLVED: To provide a membrane separation apparatus capable of maintaining a stable operation without causing reduction in amount of water-making even if a filtering time of the membrane separation apparatus is varied due to variation of raw water quality. SOLUTION: The membrane separation apparatus which has a means for detecting raw water quality, obtaining filtrate by membrane filtration of the raw water, and in which a separation membrane is washed by a washing mechanism at every given filtration time, is provided with a means for varying the given filtration time according to variation of raw water quality detected by the means for detecting raw water quality, and a means for varying the membrane filtering flow rate according to the varied filtration time. COPYRIGHT: (C)2007,JPO&INPIT
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