Wastewater treatment with granular activated carbon combined with ozonation
Many Swiss wastewater treatment plants (ARA) are currently equipped with an additional treatment stage to improve the removal of micropollutants. Two different techniques are available: ozonation and treatment with activated carbon. The potential advantages and the efficiency of a combination of these two methods are investigated in a new project at 3 ARA (ARA Glarnerland, ARA ProRheno, and ARA Altenrhein). Among other things, it will be clarified how efficiently the downstream treatment with granular activated carbon removes the transformation products of the ozonation. The behaviour of substances in the waste water over the different stages of wastewater treatment is examined by Eawag with chemical analysis (non-target and suspect screening) and by the Ecotox Center with bioassays. The project leader is Christa McArdell (Eawag, Dept. of Environmental Chemistry).
Applied Test Systems