VE water filter A VE water filter is a so-called demineralization cartridge . This is often a blue GRP-PE plastic tank or a bare stainless steel tank in which an ion exchanger, so-called mixed bed resin, is installed as a demineralized water filter. This mixed bed resin acts like a water filter for water, producing deionized water. The city water, which is initially enriched with calcium and magnesium, for example, is passed from above through the mixed bed resin in the demineralized water filter using a so-called immersion rod. This results in an exchange of ions through the mixed bed resin. Within the scope of the capacity, the mixed bed resin will release H+ from the cation exchanger and OH- from the anion exchanger, i.e. pure H2O, and in return the ion exchanger will absorb substances from the city water within the scope of the ion exchanger selectivity. When the capacity is exhausted, the mixed bed resin is regenerated, i.e. reprocessed, in a central regeneration station as part of a pool regeneration process. The previously bound substances are removed from the ion exchanger using hydrochloric acid and caustic soda and the wastewater is chemically physically treated . This process returns the demineralization cartridge to its original state. However, since the process can only be carried out optimally in a larger system due to various factors, several demineralized cartridges are regularly required (or the collection of the mixed bed resin in a collection container, e.g. a tank, which is then sent for external regeneration). In addition, demineralization cartridges release small quantities of already bound substances shortly before the conductivity rises in the outlet of the cartridge, i.e. shortly before the capacity is exhausted. It is therefore useful to always connect two VE cartridges in series to avoid these effects. There are also other techniques for producing demineralized water, but these only make economic sense for quantities more than 4 m³/week: a demineralization plant that can be regenerated on site or an industrial reverse osmosis plant. We are happy to support you in the production of demineralized water. Please feel free to contact us.