Difference between ultrafiltration equipment and reverse osmosis equipment

The main difference between ultrafiltration membrane and reverse osmosis is the difference in pore size. The pore size of a ship of reverse osmosis membrane is one percent of the ultrafiltration membrane, and the filtration accuracy of reverse osmosis membrane is higher than that of ultrafiltration membrane. Ultrafiltration membrane compared to reverse osmosis membrane, reverse osmosis membrane aperture is much smaller than ultrafiltration membrane, reverse osmosis membrane aperture is 0.0001 micron, ultrafiltration membrane aperture is 0.001 micron. The pore size of the reverse osmosis membrane is one percent of the ultrafiltration membrane, so the water filtered by the reverse osmosis membrane is more pure than that of the ultrafiltration membrane.

Ultrafiltration membrane is a membrane separation technique in which the membrane has a porous asymmetric structure. The filtration process is a solution separation process based on the mechanical sieving principle of the pressure difference between the two sides of the membrane, the working pressure is usually 0.01 to 0.03Mpa, and the fine pore size of the ultrafiltration membrane is about 0.001 to 0.01 microns. The interception molecular weight is 1,000-500,000 daltons, so the ultrafiltration membrane separation process was once considered a purely physical separation process.

Reverse osmosis membrane is an artificial semi-permeable membrane with specific properties created by simulating a biological semi-permeable membrane. RO is the English abbreviation of reverse osmosis membrane, Chinese is the meaning of reverse osmosis. Total water flow from low to high. When the water is pressurized, the water will flow from high to low. This is called the principle of reverse osmosis. The aperture of the reverse osmosis membrane is five millionths (0.0001 micron) of that of a human hair. Bacteria and viruses are 5,000 times larger, allowing only water molecules and some beneficial mineral ions to pass through, while other impurities and heavy metals are expelled from the wastewater pipes.

The aperture of the reverse osmosis membrane is 1/100 of the aperture of the ultrafiltration membrane, and the filtration accuracy of the RO reverse osmosis membrane reaches 0.0001 micron. However, the filtration accuracy of the ultrafiltration membrane is 0.001 microns. Therefore, reverse osmosis membranes can remove heavy metals, pesticides, chloroform and other chemical pollutants from water, but ultrafiltration membranes cannot. The ultrafiltration membrane removes particulate pollutants and bacteria, and reverse osmosis removes them omnipotent.