Project Description
Electroplating wastewater treatment
Electroplating wastewater comes from surface plating operations where the metal is dipped in an electroplating solution of various types of metals and then rinsed. Typical plating includes brass, nickel, cadmium, zinc, silver, copper, and gold.
Electroplating wastewater is typically from washing, rinsing and batch dumps and is at a low pH of ~3-5 and contains soluble forms of the various metals. In order to remove soluble metals from the wastewater it must first be made insoluble. The insoluble metal is then coagulated, flocculated and clarified by sedimentation.
The typical method to reduce and remove soluble electroplating metals from wastewater is as follows:
Electroplating wastewater treatment process of reach the discharge standard
Electroplating wastewater treatment process to reuse
Electroplating wastewater treatment process for zero-emission
In this wastewater reuse project, recovery rate reaches 60 percent. Effluent water quality meets the water quality standard for urban miscellaneous water consumption?GB18920-2002?. Cyanide wastewater, cadmium wastewater and nickel wastewater are separately pretreated to be connected in the intermediate tank. After sedimentation, the wastewater is transported to A/O process tank. COD/BOD has be reduced greatly in A/O process. After that wastewater sequentially goes through multimedia filter and security filter, then ultrafiltration membrane, UF filters all particles larger than 0.1?m. Then UF treated water enters RO device, producing reusable water and brine. Brine is further concentrated in MVR, producing condensate for reuse highly concentrated brine for sludge condensing.