2026-04-13T02:30:32Zhttps://recercat.cat/oai/request
oai:recercat.cat:2117/3297222026-01-30T08:21:37Zcom_2072_1033col_2072_452950
RECERCAT author Garcia Martinez, Yonhara author Chirinos, Judith author Bengoa, Christophe José author Stüber, Frank author Font Capafons, Josep author Fortuny Sanromá, Agustín author Fabregat Llangostera, Azael 2018-11-01 The present work explores the biodegradation of some emerging pollutants (EPs) in an anaerobic slowly-agitated up-flow packed-bed reactor (USPBR) filled with biological activated carbon (BAC). Chlorobenzene (CB) and 2,4-dichlorophenoxyacetic acid (2,4-D) were selected as volatile organic compounds (VOC) and major constituents of many pesticides. Experiments carried out in continuous operation showed that bioconversion up to 90% was achieved for CB and 2,4-D, at space times below 0.6 h and 1.2 h, respectively, at ambient temperature. Overall, removal rates of 0.89 g L-1 d-1 and 0.46 g L-1 d-1 were obtained for CB and 2,4-D, respectively. These results revealed that the degradation of CB and 2,4-D in this anaerobic configuration of bioreactor is an efficient and fast process. The Michaelis–Menten model properly describes the degradation process for CB. Above initial concentrations of 100 mg L-1, 2,4-D presented a considerable inhibitory effect over the biofilm. For this reason, a substrate inhibition factor was included in the Michaelis–Menten equation; the expanded model presented a good fitting to the experimental data, regardless of the inlet concentration. Therefore, USPBR-BAC combination showed to be a highly efficient system for the biodegradation of such compounds.Yonhara García-Martínez is indebted with the Universitat Rovira i Virgili for a pre-doctoral scholarship (2013PMF-PIPF-33). This project has been possible with the support of Ministerio de Economía, Industria y Competitividad (MICINN), the Agencia Estatal de Investigación (AEI) and the European Regional Development Fund (ERDF) (CTM2011-23069 and CTM2015-67970). The authors are recognised by the Comissionat per a Universitats i Recerca, DIUE de la Generalitat de Catalunya, (2017 SGR 396), and supported by the Universitat Rovira i Virgili (2017PFR-URV-B2-33).Peer ReviewedPostprint (published version) https://creativecommons.org/licenses/by/4.0/ Open Access Attribution 4.0 International Àrees temàtiques de la UPC::Enginyeria química Biodegradation Volatile organic compounds Anaerobic biodegradation Continuous fixed-bed reactor Biological activated carbon Chlorobenzene 2 4-dichlorophenoxyacetic acid Compostos orgànics volàtils -- Aspectes ambientals Biodegradació Carbó activat -- Aplicacions científiques Fast aqueous biodegradation of highly-volatile organic compounds in a novel anaerobic reaction setup Article