ultrafiltration membrane
Ultrafiltration membrane is a polymer semipermeable membrane used in the ultrafiltration process to separate polymer colloids or suspended particles of a certain size from solutions. With pressure as the driving force, the membrane pore diameter is 1 to 100nm, which is an asymmetric membrane type. The pore density is about 10/cm, and the operating pressure difference is 100~1000kPa. It is suitable for removing colloidal particles and macromolecules, and can separate solutions with a concentration of less than 10%.
- PVDF ultrafiltration membrane
- PS ultrafiltration membrane
- PES ultrafiltration membranes
- PVC ultrafiltration membrane
Application of ultrafiltration membrane in water treatment
ultrafiltration membrane in Drinking water treatment
The new generation of drinking water purification technology should not only improve treatment efficiency and optimize effects, but also emphasize that no toxic substances are produced during the process, which can improve resource and energy utilization, reduce pollution load, and improve environmental quality. Ultrafiltration technology can meet the requirements of the new generation of drinking water purification process, remove “worms”, viruses, bacteria, algae, and aquatic organisms in drinking water to ensure the safety of drinking water. It has been widely used in developed countries such as the United States and Japan. City waterworks.
Ultrafiltration membranes can intercept most suspended solids and colloids in water, but cannot remove soluble small molecular substances, hindering the application of ultrafiltration technology in drinking water treatment.
Domestic sewage and industrial wastewater treatment
Water resources are becoming increasingly scarce, and the recycling of domestic sewage and industrial wastewater has attracted much attention. Some scholars use ultrafiltration and reverse osmosis to treat the effluent from urban secondary domestic sewage treatment plants. The study found that the treatment efficiency of ultrafiltration and reverse osmosis for total phosphorus, total nitrogen, total dissolved solids, chemical oxygen demand, and chloride ions in the treated effluent are respectively More than 95%, 95%, 99%, 90%, and 97% meet the “Water Quality Standard for Landscape Environmental Water for Urban Wastewater Recycling” (GB/T 18921-2002) and can be used for landscape water; except for nitrogen indicators, most The indicators meet the drinking water source standards.
Other sewage treatment
Ultrafiltration membrane technology is also used in the treatment of circulating sewage from power plants, the treatment of circulating sewage from mining areas, the treatment of pulp and paper bleaching wastewater, and the treatment of industrial wastewater such as sewage from steel companies.