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Degradation of organic micropollutants by advanced oxidation through UV/H2O2

Author: Derks, J.G.
Mentor: Van Dijk, J.C. · Verberk, J.Q.J.C. · Lekkerkerk-Teunissen, K. · Olsthoorn, T.N.
Faculty:Civil Engineering and Geosciences
Department:Watermanagement
Programme:Sanitary Engineering
Type:Master thesis
Date:2011-01-29
Keywords: UV/H2O2 · OMPs
Rights: (c) 2011 Derks, J.G.

Abstract

Drinking water company Dunea Duin en Water produces drinking water from the Meuse River, which contains a variety of organic micropollutants (OMPs) from upstream activity. OMPs found in Dunea’s source are plant protection products, pharmaceuticals, hormones and endocrine disruptors and X-ray contrast media. Continues development of measuring equipment has resulted in lower detection limits for most substances and measuring programs are expended yearly. Consequently, more substances
are found in the Meuse River and other surface water bodies.

Dunea is currently performing research to extend the multiple barrier treatment with advanced oxidation processes (AOP) via UV and hydrogen peroxide. Mostly medium pressure (MP) mercury
vapour ultraviolet lamps are used that emit a broad spectrum of light, coinciding with the absorbance spectrum of many substances, which results in a high photolytic capacity. Low pressure (LP) mercury vapour lamps emit ultraviolet light at just one single wavelength (254 nm). Consequently, the direct
photolysis of target substances is less effective and the yield of hydroxyl radicals is lower compared to MP lamps. However, LP lamps have advantages over MP lamps such as significantly lower energy consumption and fewer by-products such as Assimilable Organic Carbon (AOC) and nitrite are formed. The objective of this research is formulated as follows:
Performance comparison of low pressure versus medium pressure mercury vapour lamps in advanced oxidation via UV/H2O2, by means of experimental research with a pilot-scale set-up.

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