The ion exchangers have been found in the field of waste water a very large application.
The rinse water accumulate on the process baths with the metals. The legislature prescribes a recycling and cleaning of the rinse water.

Principle:
In the ion exchanger system, the rinse water is continuously circulated. The solids are hold back by a fine filter. Depending of the kind of resin the ions are reversibly or irreversibly caught in the ion exchange resin. After complete loading of the resin, the ion exchanger needs to be regenerated or smelted. The smelting of the resins or the regeneration is carried out by specialist companies. The particular advantage of the System is that the ions are completely removed from dilute rinse water into the reson, where they can be recovered in a concentrated form.