Title: Toxicity assessment of advanced oxidation processes by means of respirometric measurements
Authors: Van Aken, Pieter
Van Eyck, Kwinten
Lambert, Nico
Degrève, Jan
Dewil, Raf
Issue Date: 2-Jun-2013
Publisher: IWA
Host Document: Conference proceedings LET 2013 pages:1-3
Conference: IWA Leading Edge Conference on Water and Wastewater Technologies edition:10 location:Bordeaux, France date:2-6 June 2013
Abstract: In order to evaluate the impact of the toxic and biorefractory compounds on activated sludge plants, a method based on the detection of the bacterial activity is necessary. Respirometry is a very sensitive measurement and interpretation of the biological oxygen consumption rate under well defined experimental conditions. In this study, a simple respirometric procedure was set up to detect effluent toxicity and to evaluate chemical pre-treatment. This method was taken because the mircroorganisms are representative for the wastewater treatment biomass. Initially, the EC50 value of 3,5- dichlorophenol and 2,4-Dichlorophenol is measured. Further, synthetic wastewater, containing the previous mentioned xenobiotic compounds, is treated with ozone to enhance the toxicity level of the wastewater. The respirometric set up is based on the OECD method 209. The respiration rate of the biomass is evaluated by the oxygen concentration profile detected in the liquid phase. Sodium acetate is utilized as a reference substrate. An EC50 value of approximately 25 mg/l can be derived from the experimental results. Compared to EC50 values reported in literature, the toxicity data obtained in this study is significant higher, however, the same order of magnitude is obtained.
Publication status: published
KU Leuven publication type: IMa
Appears in Collections:Sustainable Chemical Process Technology TC, Technology Campus De Nayer Sint-Katelijne-Waver
Sustainable Chemical Process Technology TC
Bio- & Chemical Systems Technology, Reactor Engineering and Safety Section
Faculty of Engineering Technology Services, Technology Campus De Nayer Sint-Katelijne-Waver
Department of Health and Technology - UC Leuven

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