| 摘要 |
PROBLEM TO BE SOLVED: To obtain a method of improving a rejection rate of a permeable membrane improving the rejection rate to an inorganic substance and an organic substance, particularly to a low molecular weight organic substance under the condition of a high flux of the permeable membrane, allowing these improved effects to maintain in high states, thereby having a high removing effect of the organic substance, particularly of the low molecular weight organic substance and capable of stable treatment for a long period, a permeable membrane, and a permeable membrane apparatus. SOLUTION: Rejection rate improving agent treatment for improving the rejection rate of the permeable membrane is conducted by keeping the permeable membrane in contact with an aqueous solution containing a hydrophilic organic compound having a molecular weight of not greater than 65, conducting heat treatment at a temperature of 35-98°C, optionally further cooling the permeable membrane, and in contact with a rejection rate improving agent composed of a water-soluble polymer. COPYRIGHT: (C)2009,JPO&INPIT
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