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Enhanced Biodegradation of Casablanca Crude Oil by A Microbial Consortium in Presence of a Rhamnolipid Produced by Pseudomonas Aeruginosa AT10

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Abstract

The biodegradation of oil products in the environment is often limited by their low water solubility and dissolution rate. Rhamnolipids produced by Pseudomonas aeruginosa AT10 were investigated for their potential to enhance bioavailability and hence the biodegradation of crude oil by a microbial consortium in liquid medium. The characterization of the rhamnolipids produced by strain AT10 showed the effectiveness of emulsification of complex mixtures. The addition of rhamnolipids accelerates the biodegradation of total petroleum hydrocarbons from 32% to 61% at 10 days of incubation. Nevertheless, the enhancement of biosurfactant addition was more noticeable in the case of the group of isoprenoids from the aliphatic fraction and the alkylated polycyclic aromatic hydrocarbons (PHAS) from the aromatic fraction. The biodegradation of some targeted isoprenoids increased from 16% to 70% and for some alkylated PAHs from 9% to 44%.

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Authors and Affiliations

  1. Center of Biotechnology and Industrial Microbiology, University of Oriente, Santiago de Cuba, Cuba

    A. Abalos

  2. Department of Microbiology, University of Barcelona, Diagonal 645, E-8028, Barcelona, Spain

    M. Viñas, J. Sabaté & A.M. Solanas

  3. Department of Microbiology and Parasitology, University of Barcelona, Diagonal 643, E-28028, Barcelona, Spain

    M.A. Manresa

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  1. A. Abalos
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  2. M. Viñas
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  3. J. Sabaté
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  4. M.A. Manresa
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  5. A.M. Solanas
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Abalos, A., Viñas, M., Sabaté, J. et al. Enhanced Biodegradation of Casablanca Crude Oil by A Microbial Consortium in Presence of a Rhamnolipid Produced by Pseudomonas Aeruginosa AT10. Biodegradation 15, 249–260 (2004). https://doi.org/10.1023/B:BIOD.0000042915.28757.fb

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  • DOI: https://doi.org/10.1023/B:BIOD.0000042915.28757.fb

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