| 摘要 |
PROBLEM TO BE SOLVED: To provide an effective cleaning method of a hollow fiber membrane module used for membrane filtering of water containing dissolved manganese. SOLUTION: In the cleaning method of the hollow fiber membrane module 3 used for membrane filtering of water containing dissolved manganese, the module is cleaned by backwashing with water not containing dissolved manganese but containing an oxidizer, then subjected to backwash cleaning with water containing a reducer. Filtrate of the hollow fiber membrane module subjected to manganese removing treatment or reverse osmosis membrane treatment is used as the water not containing dissolved manganese but containing the oxidizer. COPYRIGHT: (C)2009,JPO&INPIT
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