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oai:recercat.cat:2117/3297222026-01-30T08:21:37Zcom_2072_1033col_2072_452950

Fast aqueous biodegradation of highly-volatile organic compounds in a novel anaerobic reaction setup Garcia Martinez, Yonhara Chirinos, Judith Bengoa, Christophe José Stüber, Frank Font Capafons, Josep Fortuny Sanromá, Agustín Fabregat Llangostera, Azael Universitat Politècnica de Catalunya. Departament d'Enginyeria Química 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 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 Reviewed Postprint (published version) 2018-11-01 Article Garcia, Y. [et al.]. Fast aqueous biodegradation of highly-volatile organic compounds in a novel anaerobic reaction setup. "Environments", 1 Novembre 2018, vol. 5, núm. 11, p. 115:1-115:15. 2076-3298 http://repositori.urv.cat/estatic/PC0011/en_PC3357.html https://hdl.handle.net/2117/329722 10.3390/environments5110115 eng https://www.mdpi.com/2076-3298/5/11/115 https://creativecommons.org/licenses/by/4.0/ Open Access Attribution 4.0 International application/pdf