REVERSE OSMOSIS MEMBRANE SEPARATION METHOD AND FOULING PREVENTION AGENT OF REVERSE OSMOSIS MEMBRANE

摘要

To provide a reverse osmosis membrane separation method and a chemical agent where a reverse osmosis membrane can be stably operated for a long term even in water to be treated containing organic matter.SOLUTION: In a reverse osmosis membrane separation method performing membrane separation treatment by passing water to be treated containing organic matter through a reverse osmosis membrane, an aromatic sulfonic formalin condensate and a phosphorus compound are simultaneously or separately added into the water to be treated before the membrane separation treatment.SELECTED DRAWING: Figure 3