Oil-immersed electrophoresis coating line electrophoresis tank
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The object to be coated is immersed in a water-soluble coating, serving as the anode for anodic electrophoresis, while direct current is applied to create uniform coating of the architectural paint through the physical and chemical effects generated between the two electrodes—specifically, the electrophoresis line and the opposite cathode, along with the released electric current. But how should the electrophoresis line handle the wastewater?
Electroplating wastewater treatment methods include coagulation, biological treatment, membrane separation, and more.
1. Coagulation Method:
The coagulation method involves adding inorganic or polymeric coagulant aids to wastewater, disrupting the stability of its aqueous solution and promoting particle aggregation. This process leads to the formation of flocs, which can then be separated out, effectively treating the wastewater.
2. Biochemical Treatment Method:
Biological treatment is a method that leverages the metabolic activities of microbial strains—specifically, their cellular biological functions—to oxidatively degrade and decompose harmful substances in electrophoresis wastewater. This process effectively removes dissolved colloidal and organic chemical compounds from the wastewater (with electrophoresis effluent primarily containing soluble organic matter). Biological treatment boasts high efficiency, relatively low costs, and produces treated water that meets discharge standards.
3. Membrane Separation Method:
Membrane separation is a process that relies on external pressure to selectively pass certain substances through a semi-permeable membrane, thereby achieving the separation of organic solvents. This method encompasses three main techniques: ultrafiltration, reverse osmosis, and electrodialysis. Among these, ultrafiltration and reverse osmosis are most commonly used for treating wastewater generated during electrophoresis processes.
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