| 摘要 |
<P>PROBLEM TO BE SOLVED: To perform a long-term stable operation by suppressing a deterioration of membrane surface permeation flux in an RO separator where desalination and/or organic matter removal is performed. Ž<P>SOLUTION: The method for operating a reverse osmosis membrane separator provided in a multistage where a reverse osmosis membrane separating means for performing the desalination and/or organic matter removal is performed is provided, wherein flushing is performed on a first reverse osmosis separating means (vessels 21-24) only by opening a valve V<SB>A</SB>, flushing drainage is discharged outside the separator through pipes 41-44, 45, and 49, the valve V<SB>A</SB>may be closed during flushing, the valves V<SB>A</SB>, V<SB>C</SB>may be opened, and flushing frequency may be controlled based on a differential pressure (P<SB>1</SB>-P<SB>2</SB>). Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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