16 Jul 2024
When doing reverse osmosis system chemical cleaning, should acid cleaning or alkaline cleaning be done first?
The order of chemical cleaning of reverse osmosis membranes depends mainly on the type of contaminants. In general, the recommended cleaning order is to perform alkaline cleaning first and then acid cleaning. The following are the detailed reasons:
Alkaline cleaning first: Alkaline cleaning is mainly used to remove organic contaminants, bacteria and microorganisms. If acid cleaning is performed first, the acid and organic contaminants may react to form a passivation layer, which reduces the effect of subsequent alkaline cleaning.
Acid cleaning follow-up: Acid cleaning is mainly used to remove inorganic contaminants such as inorganic salt scale and metal ions. Alkaline cleaning first can effectively remove organic contaminants and provide better conditions for acid cleaning, making acid cleaning more thorough.
Special cases: In some cases, especially when the contaminants are mainly organic matter or microorganisms, it is possible to consider alkaline cleaning first and then acid cleaning, and then a further alkaline cleaning step to ensure thorough cleaning.
Therefore, the recommended order is to perform alkaline cleaning first and then acid cleaning, but in actual operation, it needs to be adjusted according to the specific contamination situation.
Alkaline cleaning first: Alkaline cleaning is mainly used to remove organic contaminants, bacteria and microorganisms. If acid cleaning is performed first, the acid and organic contaminants may react to form a passivation layer, which reduces the effect of subsequent alkaline cleaning.
Acid cleaning follow-up: Acid cleaning is mainly used to remove inorganic contaminants such as inorganic salt scale and metal ions. Alkaline cleaning first can effectively remove organic contaminants and provide better conditions for acid cleaning, making acid cleaning more thorough.
Special cases: In some cases, especially when the contaminants are mainly organic matter or microorganisms, it is possible to consider alkaline cleaning first and then acid cleaning, and then a further alkaline cleaning step to ensure thorough cleaning.
Therefore, the recommended order is to perform alkaline cleaning first and then acid cleaning, but in actual operation, it needs to be adjusted according to the specific contamination situation.
