Vienna Waterworks installed a new innovative treatment plant in the Waterworks Moosbrunn to improve the safety and reliability of the water supply system in case of failure or necessary repairs on either of the two spring water supply mains or during times of increased water demand. The abstracted raw water is groundwater, which is contaminated by chlorinated hydrocarbons, such as tetrachloroethene and trichloroethene. Different treatment possibilities were evaluated before the project started. One of the most suitable processes was the combined use of ozone and hydrogen peroxide (advanced oxidation process). This innovative process is installed for the first time on a full-scale basis and with a daily capacity of 64.000 m3/d it also is the biggest treatment plant in Austria. The treatment plant has been running to the complete satisfaction of Vienna Waterworks since start-up.

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