The fouling phenomenon occurred in the operation of a reverse osmosis membrane system,and the characterization analysis showed that it was organic/inorganic composite pollution,and organic pollution was the main pollution.The results of the plate membrane test show that the desalting rate is only 42％,and the desalting rate is 63％after the current alkaline washing scheme.It was found that the desalting rate of the membrane can be restored to 77％and 71％respectively after NaOH+0.05％Na-SDS+0.5％EDTA-4Na and NaOH+0.04％SDBS+0.5％EDTA-4Na cleaning,and the cleaning effect is better than the current alkaline washing scheme,which is conducive to the efficient and stable operation of the membrane system.
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