Electroplating wastewater treatment

Source of waste water: the common types of plating in electroplating plant are nickel plating, copper plating, lead plating, silver plating, gold plating and tin plating. The waste water generated is from the bubbles, emission, drops and leakage caused by the filtration of plating solution in electroplating production and the improper management of operation mode. The waste water is very harmful to the environment.

The composition of wastewater produced in electroplating production is very complex. In addition to cyanide (CN -) and acid-base, heavy metals are the potential hazardous categories of wastewater in electroplating industry. These substances seriously harm the environment and human health. The main sources of electroplating wastewater are:

1. Plating cleaning water (the main source of waste water). The wastewater contains not only heavy metal ions, but also a small amount of organic matter, which is low in content but large in quantity.

2. Discharge of rinse water and waste plating solution. This part of waste water is small in quantity, but high in content and heavy in pollution.

3. Waste liquid discharged due to “running, emitting, dripping and leaking” caused by process operation, equipment and process flow.

4. Waste water generated from washing equipment and floor. 

The treatment of electroplating wastewater has been paid more and more attention at home and abroad. Various treatment technologies have been developed to eliminate and reduce the discharge of pollutants through the measures of transforming toxic treatment into non-toxic, harmful into harmless, recycling precious metals, water recycling, etc. With the rapid development of electroplating industry and the increasing requirements of environmental protection, electroplating wastewater treatment has begun to enter the stage of clean production process, total amount control and circular economy integration. Resource recycling and closed-circuit circulation are the main directions of development.

Treatment method: our company provides targeted solutions according to different water quality. The adopted technologies include MEOS patent technology, ion exchange, membrane separation technology and biological treatment technology to realize the advanced treatment and reuse of electroplating wastewater and the resource recovery of precious metals such as nickel and copper. 

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