Anaerobic digestion for the treatment of sludge in wastewater treatment plants has been reported to produce a low organic loaded effluent with an acceptable economic cost. But in the last years, new regulations and the increasing sludge production invite us to find an alternative and/or to improve the process efficiency. Moreover, the use of the effluent as fertilizer in agriculture imposes more restrictions on digestion process product and its micropollutant contents to protect the environment. In this study, a performance of the anaerobic digestion under mesophilic and thermophilic conditions at different hydraulic retention times (HRT) is assessed and the removal efficiencies of two important compounds or family compounds (Polycyclic Aromatic Hydrocarbons, PAH, and Di-2-(Ethyl-Hexyl)-Phthalate, DEHP) are evaluated. A positive effect of thermophilic temperature was observed on both micropollutants' biodegradation. However, HRT effect also had an important role for DEHP and low molecular weighted PAH removal.
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Research Article|
April 01 2006
Biodegradation of PAH and DEHP micro-pollutants in mesophilic and thermophilic anaerobic sewage sludge digestion
T. Benabdallah El-Hadj
;
T. Benabdallah El-Hadj
1
Department of Chemical Engineering, University of Barcelona, Martí i Franquès, 1, 6th floor, 08028 Barcelona, Spain
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J. Dosta
;
J. Dosta
1
Department of Chemical Engineering, University of Barcelona, Martí i Franquès, 1, 6th floor, 08028 Barcelona, Spain
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J. Mata-Álvarez
1
Department of Chemical Engineering, University of Barcelona, Martí i Franquès, 1, 6th floor, 08028 Barcelona, Spain
E-mail: jmata@ub.edu
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Water Sci Technol (2006) 53 (8): 99-107.
Citation
T. Benabdallah El-Hadj, J. Dosta, J. Mata-Álvarez; Biodegradation of PAH and DEHP micro-pollutants in mesophilic and thermophilic anaerobic sewage sludge digestion. Water Sci Technol 1 April 2006; 53 (8): 99–107. doi: https://doi.org/10.2166/wst.2006.240
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T. Benabdallah El-Hadj, J. Dosta, J. Mata-Álvarez; Biodegradation of PAH and DEHP micro-pollutants in mesophilic and thermophilic anaerobic sewage sludge digestion. Water Sci Technol 1 April 2006; 53 (8): 99–107. doi: https://doi.org/10.2166/wst.2006.240
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