| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for operating a separation membrane module which efficiently removes the turbid materials accumulated in a raw water spacer wound around a spiral membrane element and a separation membrane apparatus. SOLUTION: To provide a method for operating the separation membrane module mounted with the spiral membrane element formed by winding the bag-like separation membrane together with the raw water spacer around the outer peripheral surface of a filtrate collecting pipe and which periodically or irregularly changes the flow direction of the raw water of the separation membrane module. Also, the method performs flushing in changing the flow direction of the raw water and performs the first one of every flushing to a direction opposite to the flow direction of the immediately preceding raw water flowing . COPYRIGHT: (C)2004,JPO
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