The wastewater of the electroplating processing plant is a kind of wastewater with very high content of heavy metals. If it is not treated in time and directly discharged, the harm is very great, so effective electroplating wastewater treatment methods are adopted. So, what methods can be used for electroplating wastewater treatment?

Electrolysis: high energy consumption, high energy consumption, high iron consumption, too much sludge produced by high-concentration chromium-containing wastewater, it is not suitable to be used. At the same time, the treatment of cyanide-containing wastewater is not ideal, and chemical methods should be used to treat cyanide-containing wastewater.

Chemical reagent + air flotation method: Use chemical reagents to neutralize air flotation to separate sludge and water. Due to the large proportion of electroplating sludge, the wastewater contains a variety of organic additives, air flotation is not thorough in practical applications, and operation and management are inconvenient. By the end of the 1990s, the application of air flotation method became less and less.

Chemicals + precipitation: This method is the first to adopt, after more than 30 years of actual use and comparison, different treatment processes are used. At present, it has been restored to a very early and effective process technology. This method is widely used in electroplating treatment abroad. However, after a long period of solid-liquid separation, the sludge in the sedimentation tank will turn over, and it is difficult to ensure the standard stability of the effluent.

Biological treatment process: The amount of water is small, and the operation effect of a single plating is high. The use of many large-scale projects is very unstable, because the water quality and volume are difficult to maintain, and it is difficult for microorganisms to adapt to changes in water temperature, species, and heavy metal ion concentration. At the pH level, a large number of microorganisms die instantly, causing environmental pollution accidents, and bacterial cultivation is not easy.

Membrane separation: It is a technology that uses the selectivity of polymers to separate substances, including electrodialysis, reverse osmosis, membrane extraction, ultrafiltration, etc. Electrodialysis is used to treat electroplating industrial wastewater, and the composition of the wastewater remains unchanged after treatment, which is beneficial to recycling.

The above-mentioned electroplating wastewater treatment methods have their own performance characteristics. The choice of vacuum coating wastewater treatment methods requires the selection of cost-effective electroplating wastewater treatment solutions based on the comprehensive characteristics of actual wastewater volume and wastewater quality.