The reverse osmosis membrane module is generally damaged by two substances, one is a substance causing membrane fouling, such as: granular colloidal insoluble matter, fouling substance, metal oxide, organic matter, etc.; the other is a substance causing chemical damage of the membrane. Such as: free chlorine, pH, microorganisms. Chemical cleaning is required when one of the following conditions occurs:
1. The salt transmission rate after standardization is increased by 10%;
2. Reduced permeate flow rate by 10% after standardization;
3. The differential pressure ΔP between the influent and concentrated water is 15% higher than the baseline condition (the baseline condition is the initial 24-48h operating parameter of the reverse osmosis unit or the operating parameters after the last cleaning).
4. As routine maintenance, generally after 3-6 months of normal operation;
5. Long-term deactivation is required before protection with protective fluid.
Before cleaning the membrane, first find out what the membrane contaminants are, that is, what needs to be cleaned, such as metal oxides, colloids, scales, biological fouling, organic matter, so that the correct medicine can be obtained and good cleaning results, such as metal. Oxide, colloid, scale, biofouling, organic matter. Cleaning methods include: physical cleaning, chemical cleaning, and physical-chemical cleaning. Among them, chemical cleaning, such as RO membrane cleaner, is the most widely used method.
Xin Pei Environmental Research and Development SP-600 series RO membrane special water treatment agent, such as: RO membrane cleaning agent, RO membrane bactericide, flocculant, reducing agent, etc., can effectively solve the problem of membrane fouling in pure water system. If you have related questions or needs, please call us!
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