Posted on 17 May 2016
Water technology company PureBlue Water, together with KWR Watercycle research institute, regional Dutch water authority Limburg and water supply company Limburg, developed a two-stage treatment process for the specific removal of remaining pharmaceuticals in the effluent of a wastewater treatment plant.
Even advanced municipal wastewater treatment plants are only able to remove 60 to 70 percent of all pharmaceuticals from the incoming sewage water. The remainder is discharged with the effluent into surface water.
More organic material
Additional treatment of the effluent is the most obvious way to remove the remaining pharmaceuticals, as well as other micro pollutants. However, given that most pharmaceuticals are hydrophilic and freely water-soluble, they are not easy to remove.
Advanced oxidation based on UV/peroxide, has become a known technology to remove micro pollutants from drinking water. Wwtp effluent however contains relatively large amounts of organic material, making advanced oxidation less efficient.
This brought PureBlue Water to the idea to use ion exchange, as a first step, so that the subsequent oxidation can be more effective.
This two-step process has a much lower energy consumption, making the estimated cost of the total process comparable to that of other processes, such as filtration over activated carbon and ozonisation.
After having been tested in principle in a laboratory, the method was successfully piloted on a large scale at wwtp Panheel, the Netherlands.
The ion exchanger did indeed remove the humic acids from the effluent. This improved the water quality to the point where the oxidation process became far more effective.
The two-step removal approach has attracted a great deal of interest among institutions in the Netherlands and abroad.
This news item was originally published on the website of KWR Watercycle research institute and Topconsortia Kennis en Innovatie: Watertechnologie (in Dutch only).
Read also on this website
● Pharmafilter receives new order for its unique biobased hospital waste treatment system, 31 December 2015
● World's first 1-Step filter officially commissioned for effluent treatment at wwtp Horstermeer, the Netherlands, 28 November 2013
● Dutch researcher proofs potential of PEM coated membranes to remove micro-pollutants, 9 February 2015
KWR Watercycle Research Institute
Nieuwegein, the Netherlands
+31 30 60 69 673
PureBlue Water/Advanced Waste Water Solutions
Kapellebrug, the Netherlands
+31 114 32 10 20
Video presentation of the pilot project with the two-step removal of pharmaceuticals from wastewater.