Bioelectrochemical remediation of hydrocarbons is a technology that exploits the ability of specific microorganisms to use as electron acceptor an electrode, thus potentially lowering the operational costs related to classical bioremediation. Several well-characterized hydrocarbonoclastic strains might be electroactive, thus their biodegradation performances in Bioelectrochemical Systems should be studied. Cupriavidus metallidurans CH34 is a model metal-resistant strain whose capacity to degrade benzene aerobically has recently been described. In this study, toluene degradation under anaerobic conditions and the exoelectrogenic capacity of Cupriavidus metallidurans CH34 were determined. Strain CH34 was grown anaerobically with toluene as sole carbon source in sealed serum bottles and then inoculated in a Microbial Electrolysis Cell (MEC) to assess its exoelectrogenic capacity. It was demonstrated for the first time that strain CH34 is able to degrade toluene under nitrate-reducing conditions (up to 45 mgtoluene/L were removed within 17 days, corresponding to 73% of toluene amended). Nitrate consumption and cellular growth were observed during toluene removal. In the MEC, toluene degradation was linked to current production, showing current peaks after every toluene addition (maximum current density 48 mA/m2). Coulombic efficiency of the toluene biodegradation process increased with time, from 11% (first batch cycle), up to 77% (last batch cycle).

Espinoza Tofalos, A., Daghio, M., MEZA GONZALEZ, A., Papacchini, M., Franzetti, A., Seeger, M. (2018). Toluene degradation by Cupriavidus metallidurans CH34 in nitrate-reducing conditions and in Bioelectrochemical Systems. FEMS MICROBIOLOGY LETTERS, 365(12) [10.1093/femsle/fny119].

Toluene degradation by Cupriavidus metallidurans CH34 in nitrate-reducing conditions and in Bioelectrochemical Systems

Espinoza Tofalos, A;Daghio, M;MEZA GONZALEZ, ADRIANA MAYOLA;Franzetti, A
;
2018

Abstract

Bioelectrochemical remediation of hydrocarbons is a technology that exploits the ability of specific microorganisms to use as electron acceptor an electrode, thus potentially lowering the operational costs related to classical bioremediation. Several well-characterized hydrocarbonoclastic strains might be electroactive, thus their biodegradation performances in Bioelectrochemical Systems should be studied. Cupriavidus metallidurans CH34 is a model metal-resistant strain whose capacity to degrade benzene aerobically has recently been described. In this study, toluene degradation under anaerobic conditions and the exoelectrogenic capacity of Cupriavidus metallidurans CH34 were determined. Strain CH34 was grown anaerobically with toluene as sole carbon source in sealed serum bottles and then inoculated in a Microbial Electrolysis Cell (MEC) to assess its exoelectrogenic capacity. It was demonstrated for the first time that strain CH34 is able to degrade toluene under nitrate-reducing conditions (up to 45 mgtoluene/L were removed within 17 days, corresponding to 73% of toluene amended). Nitrate consumption and cellular growth were observed during toluene removal. In the MEC, toluene degradation was linked to current production, showing current peaks after every toluene addition (maximum current density 48 mA/m2). Coulombic efficiency of the toluene biodegradation process increased with time, from 11% (first batch cycle), up to 77% (last batch cycle).
Articolo in rivista - Articolo scientifico
Biodegradation; Bioelectrochemical systems; Cupriavidus metallidurans CH34; Exoelectrogenic; Toluene
English
2018
365
12
fny119
none
Espinoza Tofalos, A., Daghio, M., MEZA GONZALEZ, A., Papacchini, M., Franzetti, A., Seeger, M. (2018). Toluene degradation by Cupriavidus metallidurans CH34 in nitrate-reducing conditions and in Bioelectrochemical Systems. FEMS MICROBIOLOGY LETTERS, 365(12) [10.1093/femsle/fny119].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/237360
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