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What is the chemical cleaning method for maintenance ammonia removal membrane system?


Release time:

2024-05-09

Different pollution situations in the ammonia removal membrane system require different cleaning methods.

What is the chemical cleaning method for maintenance ammonia removal membrane system?

With the long-term use of the membrane contactor, when the ammonia nitrogen content of the membrane contactor's outlet water increases, immediately detect the inlet water flow and ammonia nitrogen content. If the flow rate and the ammonia nitrogen content of the inlet water do not change, it can be judged that the membrane contactor is contaminated. Causes performance degradation, chemical cleaning is required to remove contaminants on the membrane surface in time to prevent the formation of stubborn scaling that cannot restore initial performance. Different pollution situations require different cleaning methods.
Chemical cleaning is divided into:
 1) Pickling: Use ultrafiltered water to prepare a hydrochloric acid, citric acid or oxalic acid solution with pH = 1; cycle cleaning.
 2) Alkali washing: Use ultrafiltered water to prepare a 2% sodium hydroxide and 2% sodium hypochlorite solution with a mass ratio.