METHOD FOR IMPROVING BLOCKING RATE OF REVERSE OSMOSIS MEMBRANE TREATMENT AGENT FOR IMPROVING BLOCKING RATE AND REVERSE OSMOSIS MEMBRANE

摘要

There is provided a method of improving the rejection rate of a reverse osmosis membrane that does not significantly reduce the permeation flux and can effectively improve the rejection rate even with a remarkably deteriorated membrane. A method for improving a blocking ratio of a reverse osmosis membrane that passes a first organic compound having a molecular weight of less than 200, a second organic compound having a molecular weight of 200 or more and less than 500, and a third organic compound having a molecular weight of 500 or more to a reverse osmosis membrane. The first organic compound is preferably an amino acid or an amino acid derivative. The total concentration of the first organic compound and the second organic compound and the concentration of the third organic compound are preferably 1 to 500 mg / L, respectively.