Innovative research to remove micropollutants from municipal wastewater

Witteveen+Bos, Nijhuis Industries, Delft University of Technology, STOWA along with Waternet, started research in to innovative methods of removing micropollutants from household wastewater. The research will focus on the application of ozone and activated carbon filter (O3GAC), as an additional step in the treatment process of removing micropollutants from household wastewater. This will reduce emissions of by-products. Nijhuis Industries will be building a modular demonstration pilot once the research is completed.

The research is important for the development of additional polishing steps of treating household wastewater, one of the main themes of the ‘Deltaprogramm Water Quality and Fresh Water’, signed by the Dutch minister of Infrastructure and Environment on November 16, 2016.

In order to improve the removal of micropollutants, the ozone- and activated carbon filter application method needs to be researched (O3GAC). The Delft University of Technology will set-up laboratory testing to investigate the O3GAC-principal. The O3GAC is a triple barrier, based on oxidation, adsorption and biological activated filtration. The ozone will break the micropollutants into smaller pieces. Then absorption and biological conversion will take place inside the activated carbon filter and emissions of by-products will be reduced.

O3GAC demonstration pilot

Following the laboratory research, a demonstration pilot will be built to be installed in Autumn 2017. The demonstration pilot will be located at the sewage water treatment plant in Horstermeer, the Netherlands. During the pilot, the removal of micropollutants will be tested using the O3GAC filter system. The demonstration pilot will have one square meter filter surface and a flowrate of ten cubic meters of wastewater per hour. The modular demonstration pilot will be built by Nijhuis Water Technology, part of the Nijhuis Industries group.