| 摘要 |
PROBLEM TO BE SOLVED: To provide a method and an apparatus for detecting membrane defect, and a filtering device, capable of accurately and efficiently detecting a defect caused in a separation membrane. SOLUTION: The method for detecting membrane defect comprises continuously measuring a potential difference between a reference electrode and a detecting electrode set on the permeating liquid side of the membrane, and detecting a defect of the membrane by fluctuation of the potential difference. The apparatus for detecting membrane defect comprises a reference electrode 16; detecting electrodes 17a, 17b, 17c and 17d set at least on the permeating liquid side of the membrane; and a measuring means 18 for continuously measuring a potential difference between the reference electrode and each detecting electrode. The filtering device comprises a membrane; a filtering means provided with the membrane; a reference electrode provided at a liquid supply port of the filtering means; a detecting electrode provided except the liquid supply port of the filtering means; and a measuring means for continuously measuring a potential difference between the reference electrode and each detecting electrode. COPYRIGHT: (C)2008,JPO&INPIT
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