Groundwater treatment plant for the purification of pesticides in a drinking water protection area

In order to purify and drain the contaminated water while maintaining the specified discharge parameters of less than 0.1 µg/l, the pesticides contained in the water are removed from the groundwater by means of activated carbon adsorption in three pressure filters.

Furthermore, larger amounts of iron, manganese, and nitrogen are dissolved in the groundwater to be treated. The dissolved iron (up to max. of 6 mg/l) and manganese (up to max. of 0.8 mg/l) are removed from the groundwater in two gravel filters in order to avoid clogging of the activated carbon filters by precipitating metal oxides.

The dissolved nitrogen is in turn removed from the groundwater by outgassing in two piped water reservoirs in order to avoid outgassing later in the filter tanks.