REVERSE OSMOSIS MEMBRANE SEPARATION METHOD AND ANTI-FOULING AGENT FOR REVERSE OSMOSIS MEMBRANE

摘要

To provide a method and a drug capable of stably operating a treatment system having a reverse osmosis membrane for a long period even with water to be treated containing organic matter and high-concentration phosphoric acid.SOLUTION: A reverse osmosis membrane separation method using a polymer compound represented by the following general formula (1) and an aminophosphonic acid compound for water to be treated before membrane separation treatment. (Xrepresents a single bond or an alkyl group having 1 to 2 carbon atoms. Rto Rrepresent a hydrogen atom or an alkyl group having 1 to 3 carbon atoms which may have a substituent. Rand Rmay be the same or different and may be bonded to each other to form a 5- to 7-membered cyclic amide structure.)SELECTED DRAWING: None