| 摘要 |
PROBLEM TO BE SOLVED: To keep a cleaning effect although the amount of water and a time for backward washing of a membrane module are curtailed. SOLUTION: Treatment water from a raw water tank 1 is supplied to the membrane module 4 by a pressure pump 2. After a filtration process for supplying filtrate to a filtrate tank 6, the filtrate of the filtrate tank 6 is supplied to the membrane module by a backward wash pump 7. A first backward washing process for discharging backward washing wastewater from a valve 9 and a second backward washing process for discharging backward washing wastewater from a valve 10 are repeated alternately. COPYRIGHT: (C)2003,JPO
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