Filtration and ultrafiltration wastewater treatment Filtering process is essentially wastewater having fine channels through the filter medium, and the driving force by the action of water under the fine channels, and the fine particles were trapped, require backwashing with water to remove trapped solids, restore the filtration performance. Ultrafiltration membrane treatment of wastewater basic principle is to use a selective membrane pore water pollutants exceed sieving membrane, molecular weight cutoff greater than most of the solutes are retained, small molecular weight solute and solvent were through. Features ultrafiltration process are: 1, with no change in interpersonal, can be separated at room temperature and low pressure; 2, the devices are small, simple structure, so the low investment costs; 3, the ultrafiltration process simply pressurized fluid transport, the process is simple, easy operation and management; 4, substances qualitative change does not occur in the concentration and separation process; 5, for the recovery of precious trace dilute solution of macromolecular substances and treatment of low concentration of macromolecules; 6, different molecular weight material can fractionated; 7, ultrafiltration membrane during use without impurities off, the filtrate was guaranteed pure.
