Author：Huamo Water treatment materials FROM：Water filter membrane manufacturer TIME：2021-12-02
Uf filter membrane pollution refers to the solution of the concentration of particles, colloidal solutions, organics, bacteria and other biological macromolecules in the liquid and the physical and equipment effects of the membrane, which leads to adsorption and deposition on the membrane surface or membrane pores, which reduces or blocks the membrane pores. This causes the membrane's water permeability or separation ability to decrease. Membrane fouling includes the cover fouling caused by the adsorption of too much interception on the membrane surface and the inner wall of the microplate pores, and the clogging of the membrane pores by the concentration of colloidal solution, organic matter, bacteria and other biological macromolecular substances.
(1). The surface of uf filter membrane is relatively thick (about 1cm), and the pore diameter is between 0.005-0.01um. The pollution layer on the surface of the membrane is probably a double-layer structure, the top layer is a loose layer of large particles, and a fine layer of small particles is close to the surface of the membrane. Due to the existence of the pollution layer, a large number of membranes are covered. In addition, the long-term interaction between the amount and concentration of biological macromolecular substances such as organic matter and bacteria and their residues can easily form agglomerates on the surface of the membrane and prevent the passage of water.
(2). The pore size of ro uf membrane is blocked by the amount and concentration of biological macromolecules such as colloidal solution, organic matter, bacteria, or the pore size of ro uf membrane becomes smaller or completely blocked due to the deposition of impurities such as adsorbed proteins. Pollution chemicals include colloidal solutions, organic matter, edible fungi and their calcium and iron carbonate scales. When water resources containing such polluting chemicals are cut off by the ultrafiltration membrane, many pollutants are cut off by the membrane and accumulated on the surface of the membrane. Long-term continuous operation, the particles cut off by the membrane can easily produce a suspicious glue layer and block the safe passage of water flow.
(3). Clean on time. The ultrafiltration system in operation can be cleaned regularly according to the law of membrane fouling. Can be cleaned manually. For large and medium-sized industrial production equipment, the time should be set in sequence according to the automatic control system to be cleaned on time.