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What is the reason for the high ph value of biochemical water treatment hypoxia pool? The operation precautions of reverse osmosis device are as follows: (1) the hydrolysis of cellulose acetate membrane is easy to cause the performance of reverse osmosis device to deteriorate. For this reason, the pH value of water must be strictly controlled, and the pH value of water supply must be maintained at 5-6, and the composite film can be PH3-Run under the PH11 range.(2) when the amount of secondary sodium injection is insufficient and the free chlorine in the water supply cannot be measured, there will be sticky mud on the membrane assembly of the reverse osmosis device, and the pressure difference of the reverse osmosis device will increase.However, for composite films and polyamide films, the amount of free chlorine entering the membrane assembly must be strictly controlled, and exceeding the specified value will lead to oxidation and decomposition of the membrane.(3) if the water with the F1 value exceeding the