The treatment of electroplating wastewater has been widely recognized at home and abroad. Various treatment technologies have been developed to eliminate and reduce pollutant emissions by converting toxic treatments into non-toxic and harmful, harmless, recycling precious metals, and recycling water. With the rapid development of the electroplating industry and the increasing environmental protection requirements, the current electroplating wastewater treatment has begun to enter the stage of clean production process, total quantity control and circular economy integration. Resource recycling and closed circuit cycle are the mainstream of development.

Electroplating is the process of plating a metal onto the surface of an article by electrolysis. The composition of wastewater generated in electroplating production is very complicated. Except for cyanide (CN-) and acid and alkali, heavy metals are potentially harmful types of sewage in the electroplating industry. These substances are seriously harmful to the environment and human health. The main sources of electroplating wastewater are: plating cleaning water, plating liquid filtration washing water and waste plating liquid discharge, process operation and equipment, process flow, etc., “run, run, drip, leak” discharge waste liquid and washing equipment , wastewater generated by floors, etc.

After decades of development, the treatment of electroplating wastewater has changed from the simple “treatment of waste” to comprehensive management, that is, a positive method of both prevention and recovery and recycling of resources. The trend in the development of electroplating wastewater in the 21st century should be to completely eliminate pollution and strive to achieve zero emissions. In the future treatment of electroplating wastewater, we should choose a reasonable treatment method from the actual situation, carry out economic and effective comprehensive prevention and control of electroplating wastewater, strive for the coordination of environmental, economic and social benefits, and truly achieve clean production.