Decker Verfahrenstechnik GmbH is an SME based in Bavaria/Germany with a focus on the production of deionized water, pure and ultrapure water, the recycling of rinsing water and the chemical-physical wastewater treatment of industrial wastewater, often with heavy metal contamination. Various processes are used, e.g. reverse osmosis, electrodeionization and ion exchangers. Decker Verfahrenstechnik GmbH also offers the regeneration of loaded ion exchange resins as a service. These can be mixed bed polisher ion exchangers after electrodeionization, heavy metal loaded ion exchangers from recirculation or selective exchangers from wastewater treatment or groundwater remediation or drinking water treatment (e.g. removal of nickel).