Electroplating equipment Electroplating factories produce a large amount of waste water in the process of parts electroplating, which contains a large number of heavy metal ions, such as chromium, cadmium, nickel, copper, zinc, gold, silver and other heavy metal ions and cyanide. Some exist in the form of simple cations, others in the form of acid groups and complexes. Electroplating production wastewater usually comes from pickling, electroplating, workshop cleaning, equipment condensate, etc. The quality and quantity of electroplating wastewater are related to the process conditions, production load, operation management and water use mode of electroplating production.

The commonly used methods for electroplating wastewater treatment are 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 further treatment.

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

1。 Electroplating wastewater treatment equipment It is applicable to water pollutant discharge management and air pollutant discharge management of existing electroplating enterprises.

2。 Zero discharge of electroplating wastewater It is applicable to environmental assessment, environmental protection facility design, environmental protection acceptance after completion, and water and air pollutant discharge management of electroplating enterprises after putting into production.

III. Surface treatment facilities suitable for anodic oxidation.

4。 Applicable to the discharge of pollutants permitted by law.