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Appl Microbiol Biotechnol

Title:		"Biodegradation of benzo[alpha]pyrene, toluene, and formaldehyde from the gas phase by a consortium of Rhodococcus erythropolis and Fusarium solani"
Author(s):		Morales P; Caceres M; Scott F; Diaz-Robles L; Aroca G; Vergara-Fernandez A;
Address:		"Green Technology Research Group, Facultad de Ingenieria y Ciencias Aplicadas, Universidad de los Andes, Santiago, Chile. Escuela de Ingenieria Bioquimica, Facultad de Ingenieria, Pontificia Universidad Catolica de Valparaiso, Valparaiso, Chile. Departamento de Ingenieria Quimica, Facultad de Ingenieria, Universidad de Santiago de Chile, Santiago, Chile. Green Technology Research Group, Facultad de Ingenieria y Ciencias Aplicadas, Universidad de los Andes, Santiago, Chile. aovergara@miuandes.cl"
Journal Title:		Appl Microbiol Biotechnol
Year:		2017
Volume:		20170706
Issue:		17
Page Number:		6765 - 6777
DOI:		10.1007/s00253-017-8400-8
ISSN/ISBN:		1432-0614 (Electronic) 0175-7598 (Linking)
Abstract:		"Polycyclic aromatic hydrocarbons (PAHs) and volatile organic compounds (VOCs) are important indoor contaminants. Their hydrophobic nature hinders the possibility of biological abatement using biofiltration. Our aim was to establish whether the use of a consortium of Fusarium solani and Rhodococcus erythropolis shows an improved performance (in terms of mineralization rate and extent) towards the degradation of formaldehyde, as a slightly polar VOC; toluene, as hydrophobic VOC; and benzo[alpha]pyrene (BaP) as PAH at low concentrations compared to a single-species biofilm in serum bottles with vermiculite as solid support to mimic a biofilter and to relate the possible improvements with the surface hydrophobicity and partition coefficient of the biomass at three different temperatures. Results showed that the hydrophobicity of the surface of the biofilms was affected by the hydrophobicity of the carbon source in F. solani but it did not change in R. erythropolis. Similarly, the partition coefficients of toluene and BaP in F. solani biomass (both as pure culture and consortium) show a reduction of up to 38 times compared to its value in water, whereas this reduction was only 1.5 times in presence of R. erythropolis. Despite that increments in the accumulated CO(2) and its production rate were found when F. solani or the consortium was used, the mineralization extent of toluene was below 25%. Regarding BaP degradation, the higher CO(2) production rates and percent yields were obtained when a consortium of F. solani and R. erythropolis was used, despite a pure culture of R. erythropolis exhibits poor mineralization of BaP"
Keywords:		"Air Pollution, Indoor/prevention & control Benzo(a)pyrene/*metabolism *Biodegradation, Environmental Biomass Filtration/instrumentation Formaldehyde/*metabolism Fusarium/*metabolism Microbial Consortia/physiology Polycyclic Aromatic Hydrocarbons/metabolis;"
Notes:		"MedlineMorales, Paulina Caceres, Manuel Scott, Felipe Diaz-Robles, Luis Aroca, German Vergara-Fernandez, Alberto eng ID4i1013/CONICYT Chile/ Germany 2017/07/08 Appl Microbiol Biotechnol. 2017 Sep; 101(17):6765-6777. doi: 10.1007/s00253-017-8400-8. Epub 2017 Jul 6"