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21/09/2011
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Isala Hospital in Zwolle, the Netherlands, is trialling Berson's medium pressure UV systems for the firs time, for treating hospital wastewater prior to discharge.
 Peter Menne, Berson's European sales manager, explains that UV is applied in combination with hydrogen peroxide to generate OH radicals in a so-called advanced oxidation process (AOP).
OH radicals attack the pharmaceutical residues and -ray contrast compounds, breaking them down into H2O, CO2 and harmless metabolites, he explains.
First, the wastewater stream is pre-treated in a membrane bioreactor, before passing through the in-line medium pressure UV system. Treated wastewater is then discharged as treated sewage into the municipal sewage system.
"The pilot plant is going well and Waterschap Groot-Salland, the local water authority which runs the project, has given me very good feedback so far," comments Menne.
"An additional benefit of this system is that it requires high doses of UV, which is extremely effective at destroying any microorganisms present in the wastewater," he adds.
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Author
Brian Tinham
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