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Phenenthrene biodegradation by an algal-bacterial consortium in two-phase partitioning bioreactors.

Munoz, Raul LU ; Guieysse, Benoit LU and Mattiasson, Bo LU (2003) In Applied Microbiology and Biotechnology 61(3). p.261-267
Abstract
An algal-bacterial consortium formed by Chlorella sorokiniana and a phenanthrene-degrading Pseudomonas migulae strain was able to biodegrade 200-500 mg/l of phenanthrene dissolved in silicone oil or tetradecane under photosynthetic conditions and without any external supply of oxygen. Phenanthrene was only removed when provided in organic solvent, which confirms the potential of two-phase systems for toxicity reduction. Phenanthrene was degraded at highest rates when provided in silicone oil rather than in tetradecane since this solvent probably sequestered the PAH, reducing its mass transfer to the aqueous phase. The influence of phenanthrene concentration, amount of inoculum and light intensity on pollutant removal was also investigated... (More)
An algal-bacterial consortium formed by Chlorella sorokiniana and a phenanthrene-degrading Pseudomonas migulae strain was able to biodegrade 200-500 mg/l of phenanthrene dissolved in silicone oil or tetradecane under photosynthetic conditions and without any external supply of oxygen. Phenanthrene was only removed when provided in organic solvent, which confirms the potential of two-phase systems for toxicity reduction. Phenanthrene was degraded at highest rates when provided in silicone oil rather than in tetradecane since this solvent probably sequestered the PAH, reducing its mass transfer to the aqueous phase. The influence of phenanthrene concentration, amount of inoculum and light intensity on pollutant removal was also investigated and, under the best conditions, phenanthrene was degraded at 24.2 g mm3·hm1. In addition to being cost-effective and mitigating the release of greenhouse gases into the atmosphere, photosynthetic oxygenation was especially beneficial to the use of two-phase partitioning bioreactors since it prevented solvent emulsification and/or volatilization and evidence was found that the microalgae release biosurfactants that could further enhance phenanthrene degradation. (Less)
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author
organization
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type
Contribution to journal
publication status
published
subject
in
Applied Microbiology and Biotechnology
volume
61
issue
3
pages
261 - 267
publisher
Springer
external identifiers
  • wos:000183198900013
  • scopus:0038026139
ISSN
1432-0614
DOI
language
English
LU publication?
yes
id
8db9ef46-6668-4676-ad65-0bc0c67d8550 (old id 129231)
date added to LUP
2007-07-02 14:30:05
date last changed
2018-05-29 10:28:06
@article{8db9ef46-6668-4676-ad65-0bc0c67d8550,
  abstract     = {An algal-bacterial consortium formed by Chlorella sorokiniana and a phenanthrene-degrading Pseudomonas migulae strain was able to biodegrade 200-500 mg/l of phenanthrene dissolved in silicone oil or tetradecane under photosynthetic conditions and without any external supply of oxygen. Phenanthrene was only removed when provided in organic solvent, which confirms the potential of two-phase systems for toxicity reduction. Phenanthrene was degraded at highest rates when provided in silicone oil rather than in tetradecane since this solvent probably sequestered the PAH, reducing its mass transfer to the aqueous phase. The influence of phenanthrene concentration, amount of inoculum and light intensity on pollutant removal was also investigated and, under the best conditions, phenanthrene was degraded at 24.2 g mm3·hm1. In addition to being cost-effective and mitigating the release of greenhouse gases into the atmosphere, photosynthetic oxygenation was especially beneficial to the use of two-phase partitioning bioreactors since it prevented solvent emulsification and/or volatilization and evidence was found that the microalgae release biosurfactants that could further enhance phenanthrene degradation.},
  author       = {Munoz, Raul and Guieysse, Benoit and Mattiasson, Bo},
  issn         = {1432-0614},
  language     = {eng},
  number       = {3},
  pages        = {261--267},
  publisher    = {Springer},
  series       = {Applied Microbiology and Biotechnology},
  title        = {Phenenthrene biodegradation by an algal-bacterial consortium in two-phase partitioning bioreactors.},
  url          = {http://dx.doi.org/},
  volume       = {61},
  year         = {2003},
}