| 摘要 |
PROBLEM TO BE SOLVED: To provide a cleaning method for obtaining a high restoration rate and recycling a membrane module. SOLUTION: In the liquid chemical cleaning method for cleaning the filtration membrane module composed of a hydrophobic resin with an oxalic acid solution, it is cleaned with the liquid mixture of a sodium hypochlorite solution and a sodium hydroxide solution before or after that. Also, the filtration membrane module to be cleaned filters one of ground water, well water, water of rivers and water of lakes and marshes or a liquid mixture thereof. COPYRIGHT: (C)2006,JPO&NCIPI
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