{"id":4595,"date":"2025-09-22T10:07:09","date_gmt":"2025-09-22T08:07:09","guid":{"rendered":"https:\/\/decker-vt.de\/selective-ion-exchanger-system\/"},"modified":"2025-11-06T13:16:20","modified_gmt":"2025-11-06T12:16:20","slug":"selective-ion-exchanger-system","status":"publish","type":"page","link":"https:\/\/decker-vt.de\/en\/products\/selective-ion-exchanger-system\/","title":{"rendered":"Selective ion exchanger system"},"content":{"rendered":"\n
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Selective ion exchanger system, SAT system<\/h1>\n<\/div>\n\n
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A selective ion exchanger system, SAT system, is used as a so-called police filter in industrial wastewater plants (CP plants, chemical-physical wastewater plants<\/a>) in the final filtration after precipitation\/flocculation or, for example, in groundwater remediation in order to keep regulatory relevant residual heavy metal contents in the wastewater below the required monitoring value.<\/p>\n\n\n\n

In industrial chemical-physical wastewater treatment plants<\/a>, there is usually a batch or continuous treatment of the wastewater produced, in which substances relevant to monitoring are removed from the wastewater by precipitation and flocculation. However, due to the complex composition and discontinuity of industrial wastewater (partial) streams, this treatment alone may not be sufficient to meet the official requirements for wastewater treatment in accordance with the relevant annex of the Wastewater Ordinance or, in the case of indirect dischargers, the drainage statutes of the local municipal wastewater treatment plant. To ensure this according to the state of the art, a selective ion exchanger system, SAT system, with an IDE exchanger resin (iminodiacetic acid exchanger), e.g. Lewatit TP 207, is used in these cases to remove the heavy metals, often nickel, copper, zinc or lead, which are not sufficiently reduced in the CP treatment and exchange them for Na+, Ca2+ or another cation with which the ion exchanger<\/a> has been conditioned. Parameters that are not relevant for monitoring, such as alkaline earth metals (e.g. Mg), are not bound by the exchanger to a relevant extent in order not to unnecessarily exhaust the capacity of the exchanger. The order of binding is determined by the ion exchanger selectivity<\/a>, i.e. the affinity of the individual heavy metals for the iminodiacetic acid group of Lewatit TP207. <\/p>\n\n\n\n

The same process can also be used in groundwater remediation<\/a>, depending on the parameters, possibly also with other resin types than the selective ion exchanger TP 207, e.g. a weakly or strongly basic anion exchanger for cyanide complexes.<\/p>\n\n\n\n

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