There are many kinds of electroplating wastewater discharged after production, and the water quality is complex. The wastewater is toxic, which will not only pollute the water quality, but also do great harm to health. It must be treated before it can be discharged. At present, the common treatment methods of electroplating wastewater are chemical method, biological method, physical-chemical method and electrochemical method. In addition to cyanide-containing wastewater and acid-base wastewater, it also contains various heavy metal ions (such as Cr, Cd, Ni, Au) and additives such as surfactants. Therefore, it is an essential link to treat the chromaticity of this kind of wastewater and the decolorant of heavy metal substances in the wastewater. Therefore, the decoloring agent can not only quickly flocculate and decolor the color in wastewater, but also reduce the COD, heavy metals and other substances in wastewater, and solve the water pollution problem at one time through mud-water separation. Treatment steps: only three steps are needed: 1. Add two thousandths of decolorant, 2. Adjusting the PH value of wastewater to about 7-8; 3. Adding polyacrylamide (PAM) to accelerate flocculation and precipitation. The operation process is very simple, and the adaptability is strong. The treated water supernatant is clear and bright, and there is no need to worry about the color reversal after long-term storage.

Finally, if you want to achieve the effect of recycling emissions, you can combine biochemical systems.