Sequential solar photo-fenton-biological system for the treatment of winery wastewaters |
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Authors: | Mosteo R Sarasa J Ormad Maria P Ovelleiro J L |
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Institution: | Department of Chemical Engineering and Environmental Technologies, University of Zaragoza, C/Pedro Cerbuna, 12, 50009, Zaragoza, Spain. mosteo@unizar.es |
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Abstract: | In this study, winery wastewaters are considered for degradation using heterogeneous photo-Fenton as a preliminary step before biotreatment. The heterogeneous photo-Fenton process assisted by solar light is able to partially degrade the organic matter present in winery wastewaters. When an initial hydrogen peroxide concentration of 0.1 M is used over 24 h of treatment, a degradation yield of organic matter (measured as TOC) of around 50% is reached. The later treatment (activated sludge process) allows the elimination of 90% of the initial TOC present in pretreated winery wastewaters without producing nondesired side-effects, such as the bulking phenomenon, which is usually detected when this treatment is used alone. The final effluent contains a concentration of organic matter (measured as COD) of 128 mg O2/L. The coupled system comprising the heterogeneous photo-Fenton process and biological treatment based on activated sludge in simple stage is a real alternative for the treatment of winery wastewater. |
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