What is the difference between ultrafiltration membrane and RO membrane?
First, the filtration accuracy is different
1, the filtration accuracy of ultrafiltration membrane is 0.01 micron, which can remove microorganisms, colloids, diatoms and other substances causing turbidity. Good hydrophilicity, long life, strong anti-fouling ability, can retain beneficial minerals, mainly used in kitchen water purifier, large water output.
2, the filtration accuracy of ro membrane is 0.0001 micron (one millionth micron), is currently the highest filtration accuracy of the filter element, can filter bacteria, heavy metals, organic matter, colloids and other harmful substances in water. RO membrane purification water quality is consistent, long service life, automatic sewage, large water production, drinking safety.
Second, different aperture
1. Ultrafiltration membrane is a microporous filtration membrane with a consistent aperture standard and an additional aperture size of 0.001-0.02 microns. Applying the right pressure to one side of the membrane, solute molecules smaller than the pore size can be screened to separate particles with molecular weights greater than 500 Daltons (atomic mass units) and particle sizes greater than 10 nanometers.
2, ro membrane aperture is only 1/100 of the ultrafiltration membrane aperture, so ro membrane can remove very small organic molecular pollution in water, such as chemical organic matter, organic pesticide pollution. Ultrafiltration membranes do not. Reverse osmosis membrane also softens water quality, turning hard water into soft water.
Third, the scale of use is different
1, ultrafiltration membrane used in: drinking water, domestic sewage and industrial wastewater treatment, other sewage treatment, in the food field is mainly used in juice concentration, clarification, beer production and nutrient extraction; In the pharmaceutical aspect, it is mainly used in the separation and refining of drugs, the removal of pyrogen, sterilization, etc., especially in the separation and extraction of antibiotics and vitamins.
2, ro membrane used in: steel, electronics, medicine, electricity, petrochemical, food and beverage, municipal and environmental protection and other fields, in seawater and brackish water, boiler water supply, industrial pure water and electronic grade ultra-pure water preparation, drinking pure water production, wastewater treatment and special separation process plays an important role.
It can be seen that RO membrane and ultrafiltration membrane is still very different, but with the development of science and technology, the improvement of quality of life, water treatment problems are also more and more attention, whether it is ultrafiltration membrane or ro reverse osmosis membrane, in water treatment, have shown great contributions.
