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Water Science & Technology Vol 51 No 1 pp 113–120 © IWA Publishing 2005 Degradation of wine industry wastewaters by photocatalytic advanced oxidationP. Navarro*, J. Sarasa**, D. Sierra***, S. Esteban**** and J.L. Ovelleiro******Department of Chemical Engineering and Environmental Technology, University of Zaragoza, C/Pedro Cerbuna, 12, 50009 Zaragoza, Spain (E-mail: 434530@unizar.es) ABSTRACT Wine industry wastewaters contain a high concentration of organic biodegradable compounds as well as a great amount of suspended solids. These waters are difficult to treat by conventional biological processes because they are seasonal and a great flow variation exists. Photocatalytic advanced oxidation is a promising technology for waters containing high amounts of organic matter. In this study we firstly investigated the application of H2O2 as oxidant combined with light (artificial or natural) in order to reduce the organic matter in samples from wine industry effluents. Secondly, we studied its combination with heterogeneous catalysts: titanium dioxide and clays containing iron minerals. The addition of photocatalysts to the system reduces the required H2O2 concentration. Although the H2O2/TiO2 system produces higher efficiencies, the H2O2/clays system requires a H2O2 dosage between three and six times lower. eProduct: Buy this article for £24.00 (IWA MEMBER PRICE: £18.00) All prices include VAT. For customers where VAT should not be applied, the VAT amount will be removed upon payment |
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