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Reasons For Reverse Osmosis Membrane Contamination

Membrane contamination refers to the physical, chemical interaction or concentration polarization of particles, colloidal particles or solute macromolecules in contact with the membrane. The concentration of some solutes on the membrane surface exceeds its solubility and due to mechanical action Caused by the membrane surface or membrane pore adsorption, deposition caused by membrane pore size becomes smaller or blocked, so that the membrane through the flow and separation characteristics irreversible changes.


Pollutants, especially proteins and other macromolecules in the membrane surface and membrane pore adsorption caused by the flux attenuation and separation capacity is reduced, is the main cause of membrane flux attenuation. However, the flux attenuation caused by membrane fouling is often mixed with the reversible flux drop caused by the concentration polarization phenomenon, which makes the membrane separation effect further reduced.


Reverse osmosis membrane pollution causes:
Reverse osmosis system in the course of operation, waste (sewage) in the metal ions, microorganisms, insoluble precipitation, organic pollutants, biological slime, colloid, grease and other long contact with the membrane, will cause membrane contamination, Flux and separation performance was significantly reduced, the pressure drop increased


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