Application of Polyacrylamide in coating wastewater treatment
TIME:2023-07-21 17:32:51SOURCE:admin
Coating wastewater is one of the most difficult to treat, which mainly comes from pre degreasing, degreasing, surface conditioning, phosphating, passivation and other body pretreatment processes, cathodic electrophoresis process and intermediate coating process The waste water of automobile painting contains resin, surfactant, heavy metal ions, pigment and other pollutants, especially the eletrophoresis waste water and painting waste water with complex composition, high concentration and poor biodegradability. Coating wastewater is mainly treated by quality separation, coagulation sedimentation, coagulation floatation, sand filtration and other processes.
Coating wastewater treatment using polyacrylamide flocculant, generally in the treatment of this wastewater, the method may be different, but the use of anionic polyacrylamide is more common. The pretreatment process includes degreasing, degreasing, surface adjustment and phosphating. The main wastewater is oily wastewater and phosphorus wastewater. Flocculation refers to the aggregation of unstable colloidal particles. When treating these wastewater, the dosage of polyacrylamide should be well controlled. If the dosage is too much, the water quality will be sticky. If the dosage is too little, the flocculation is not clean enough. So Gongyi Filter Industry Co.,Ltd reminds you that it is better to do a beaker test.