Biodegradation of benzo[α]pyrene, toluene, and formaldehyde from the gas phase by a consortium of Rhodococcus erythropolis and Fusarium solani

Paulina Morales, Manuel Cáceres, Felipe Ignacio Scott, Luis Díaz-Robles, Germán Aroca, Alberto Vergara

Research output: Contribution to journalArticlepeer-review

19 Scopus citations

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[α]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 CO2 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 CO2 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.

Original languageEnglish
Pages (from-to)6765-6777
Number of pages13
JournalApplied Microbiology and Biotechnology
Volume101
Issue number17
DOIs
StatePublished - 1 Sep 2017

Bibliographical note

Funding Information:
The present research has been sponsored by CONICYT?Chile (National Commission for Scientific and Technological Research) (FONDEF IDeA in two stages, No. ID4i10130). We thank Dr. Sergio Revah, Metropolitan Autonomous University, Mexico, for providing the Fusarium solani B1 (CBS 117476) strain. The authors declare that they have no conflict of interest.

Funding Information:
Acknowledgements The present research has been sponsored by CONICYT—Chile (National Commission for Scientific and Technological Research) (FONDEF IDeA in two stages, No. ID4i10130). We thank Dr. Sergio Revah, Metropolitan Autonomous University, Mexico, for providing the Fusarium solani B1 (CBS 117476) strain.

Publisher Copyright:
© 2017, Springer-Verlag GmbH Germany.

Keywords

  • Biodegradability
  • Fusarium solani
  • PAHs
  • Rhodococcus erythropolis
  • VOCs

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