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Advanced Oxidation Processes in Drinking Water Treatment - Minimisation of Disinfectants and Reduction of Bacterial Regrowth (AOP)

Advanced Oxidation Processes in Drinking Water Treatment - Minimisation of Disinfectants and Reduction of Bacterial Regrowth (AOP)
Contact:Fritz H. Frimmel
Project Group:BMBF - Joint Research Project
Funding:BMBF

Period

completed

Description

Advanced Oxidation Processes in Drinking Water Treatment - Minimisation of Disinfectants and Reduction of Bacterial Regrowth
(AOP)

The influence of advanced oxidation processes (AOP) on natural organic matter (NOM) is theme of the project "Advanced Oxidation Processes in Drinking Water Treatment - Minimisation of Disinfectants and Reduction of Bacterial Regrowth". The project is sponsored by the Federal Ministry for Education and Research (BMBF) and is a co-operation of three water supply companies and three research centres. Parts of the NOM are reason for the production of chlorine-organic disinfection by-products (DBPs), which are possibly toxic. Also, bacterial regrowth in supply net is caused by NOM-substances. The production of hygienic safe water by changing the properties of NOM with oxidation processes is basic aim of the project. The Engler-Bunte-institute is comparing the changes of the NOM caused after the treatment with three different kind of AOPs (ozone/UV-, hydrogen-peroxide/UV- and ozone/hydrogen-peroxide-process) and after ozonation. To characterise the NOM gel chromatography with DOC-detection is used. The results of gel chromatography were correlated with the results of DBP- and bacterial regrowth experiments. First results show that AOP, which use ozone, are more effective in reducing DBPs than the hydrogen-peroxide/UV process. The bacterial growth after AOP treatment is lower than after ozonation.