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Effect of oxic/anoxic switches on bacterial communities and PAH biodegradation in an oil-contaminated sludge

Authors
  • Vitte, Isabelle1
  • Duran, Robert1
  • Jézéquel, Ronan2
  • Caumette, Pierre1
  • Cravo-Laureau, Cristiana1
  • 1 Université de Pau, Equipe Environnement et Microbiologie, IPREM UMR/CNRS 5254, Pau Cedex, 64013, France , Pau Cedex (France)
  • 2 Cedre Centre de Documentation, de Recherche et d’Expérimentations sur les pollutions accidentelles des eaux, 715 rue Alain Colas, CS 41836, Brest Cedex 2, 29818, France , Brest Cedex 2 (France)
Type
Published Article
Journal
Environmental Science and Pollution Research
Publisher
Springer-Verlag
Publication Date
Mar 10, 2011
Volume
18
Issue
6
Pages
1022–1032
Identifiers
DOI: 10.1007/s11356-010-0435-7
Source
Springer Nature
Keywords
License
Yellow

Abstract

PurposeWe studied the effect of alternations of aeration on both the autochthonous bacterial communities from an oily sludge to the endogenous polycyclic aromatic hydrocarbons (PAH) biodegradation compared to a permanent oxic condition.MethodsGenomic and transcriptional analyses associated with chemical measurements were used to assess the dynamics of bacteria coupled to PAH removal during an incubation of 26 days.Results and conclusionsThe autochthonous bacterial communities of an oil sludge showed a strong potential to adapt and degrade PAH when they were subjected to alternating anoxic/oxic conditions, as well as under an oxic condition. In addition, changes in the bacterial communities were related to the different phases of hydrocarbon degradation, and the removal efficiency of PAH was similar in both switching and permanent oxic conditions. This methodology could be useful for an alternative solution of oil sludge treatment with a low-cost processing, as its efficiency is similar to that of a permanent oxic incubation which is more expensive in oxygen supply.

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