What are the cleaning methods of RO membrane?

Usually with 2% citric acid plus a small amount of hydrochloric acid adjusted to PH3 ~ 4 or so acid wash, with 0.8% EDTA-2NA plus 2% STPP with NaOH adjusted to PH10 ~ 11 alkaline wash, each cleaning routine contamination 34 liters to get the cleaning solution, and then consider a number of redundancies, change the cleaning solution to try to rinse to the neutral

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