| 摘要 |
PROBLEM TO BE SOLVED: To provide a method and an apparatus for cleaning a separation membrane module with a chemical which reduce the amounts of the chemical used and rinsing water in cleaning a separation membrane module with a chemical, cause no contamination of the secondary side of the membrane by suspending impurities in passing and circulating the chemical from the secondary to the primary side of the membrane, exert a high effect of removing suspending impurities in the cleaning process with the chemical and can improve the efficiency of the rinsing process after the cleaning process with a chemical. SOLUTION: In the cleaning process with a chemical in which a chemical stored in a chemical storage tank is circulated between the chemical storage tank and a separation membrane module with a chemical cleaning pump, while passed from the secondary to the primary side of the membrane constituting the module, the chemical is filtrated with a filter arranged in a pipe connecting the chemical tank with the separation membrane module and then supplied to the module. COPYRIGHT: (C)2007,JPO&INPIT
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