DVGW-Vorhaben: Einsatzmöglichkeiten und Einsatzgrenzen von Verfahren zur Verringerung unerwünschter DOC-Anteile (Entfärbung) in huminstoffreichen Grundwässern

Project Acronym
Project Title
DVGW project: Removal of dissolved organic carbon from groundwater containing humic acids (decolorization) – possible applications and limits of treatment processes (COL_EX)
Principal Investigator
Kämmler, Jakob
Project Abstract
Both in the laboratory and at selected waterworks sites, three technologies (flocculation / precipitation, oxidation, adsorption) are examined for their decolorization efficiency and the respective performance limits. As an innovative method, ozonation with downstream biofiltration is used. This technique is used almost exclusively in surface waters for other treatment purposes (disinfection, odorants, pre-flocculation). Ozone selectively attacks chromophoric molecules and is therefore well suited for decolorization. In contrast to other technologies, no residues (sludge, concentrates) are generated. However, questions about the resulting DOC bioavailability and the formation of bromate depending on technical parameters and water quality have to be answered.

The participating water suppliers offer access to their plants and previous experience in dealing with the problem. Thus, the application possibilities and limitations of the considered methods become clear.

The evaluation of the results of the analyzed treatment processes is carried out with the aim of developing recommendations for action in the DVGW set of rules, as well as minimizing the use of energy and chemicals and the entire life cycle costs.