What are the relevant discharge standards for electroplating wastewater in the near future?

Electroplating equipment Electroplating factories cause a lot of wastewater in the process of parts electroplating, which contains a lot of heavy metal ions, such as chromium, cadmium, nickel, copper, zinc, gold, silver and other heavy metal ions and cyanide. Some are stored as simple cations, while others are stored as acid groups and complexes. Electroplating production wastewater usually comes from pickling, electroplating, workshop cleaning, equipment condensate, etc. The product quality and total amount of electroplating wastewater are related to the process conditions, production load, operation management methods and water use methods of electroplating production.

The common solutions to electroplating wastewater include neutralization sedimentation, neutralization coagulation sedimentation, oxidation reduction, barium salt and ferrite. The chemical method is simple in equipment, low in investment and widely used, but the sludge still needs to be further solved.

At present, the recent relevant discharge standard of electroplating wastewater is the Discharge Standard of Electroplating Pollutants (GB21900-2008). The scope of application of this standard is as follows:

one Electroplating wastewater treatment equipment It is mainly used for water pollutant discharge management methods and air pollutant discharge management methods of existing electroplating companies.

two Zero discharge of electroplating wastewater The zero discharge of electroplating wastewater is mainly used for environmental impact assessment, environmental protection facility design, environmental protection acceptance after completion, and water and air pollutant discharge management methods after the completion and operation of electroplating companies.

3. Surface treatment facilities mainly used for anodic oxidation.

4. Mainly used for the discharge of pollutants allowed by law.