Therefore, if it can be returned to the baths, it is beneficial in terms of efficient wastewater treatment as well as resource saving. This section discusses more active measures, namely, methods for returning the removed solution to the plating baths. However, to recycle plating solution, care should be taken to prevent impurity increase and decomposed additives. The system uses atmospheric-pressure vaporization.
Exhaust gas is brought into contact with liquid to be concentrated in a packed bed of the system.
Mist is also removed by filtering effects. To remove these positive ions, electrolytic impurity-removal equipment is provided.