UF ultrafiltration membranes and RO reverse osmosis membranes are widely used in water treatment systems because they do not require phase change, can be assembled and integrated, can be controlled intelligently, and can be used to purify and separate water quality.
Ultrafiltration and reverse osmosis membranes use a membrane to filter a solution under a certain pressure, and the membrane design can remove certain size molecules. Ultrafiltration membranes allow salts and other electrolytes to pass through, but particles and substances with large relative molecular weight cannot pass through. Reverse osmosis membranes can block all soluble salts and organic substances with a molecular weight greater than 100, but allow water molecules to pass through. The pressure required for ultrafiltration is lower than that for reverse osmosis.
UF ultrafiltration membranes can intercept particles and impurities between 0.002~0.1 microns, allowing small molecular substances and dissolved solids to pass through, but effectively blocking colloids, proteins, microorganisms and large molecular organic substances. The operating pressure on both sides of the RO membrane is generally between 0.2~7bar. RO reverse osmosis membrane is a precise membrane liquid separation technology, which can block all soluble salts and organic substances with a molecular weight greater than 100, but allow water molecules to pass through. The desalination rate of cellulose acetate RO membrane can reach 95%, and the desalination rate of RO composite membrane can reach 98%. They are widely used in seawater and brackish water desalination, boiler feed water, industrial pure water and electronic grade ultra-pure water preparation, production of drinking pure water, wastewater treatment and special separation processes. Using RO before ion exchange can greatly reduce operating costs and wastewater discharge.
Post time: Apr-10-2025