| 摘要 |
PROBLEM TO BE SOLVED: To obtain a detergent for a permeation membrane for treating water having strong washing effect and no bad influence on the membrane and a human body, and to provide a washing method. SOLUTION: The membrane detergent used for washing of the permeation membrane for treating water contaminated with an inorganic substance is a membrane detergent characterized in that it contains ascorbic acid or erythorbic acid, and an inorganic acid is not mixed. Concentration of ascorbic acid or erythorbic acid may be 0.05-0.35 wt.%. In the method for washing the membrane, the membrane for treating water contaminated with the inorganic substance is washed using a washing liquid containing the detergent. COPYRIGHT: (C)2004,JPO&NCIPI
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