alexa Enhancement of Hydrocarbons Degradation by Use of Pseudomonas Biosurfactants and Biofilms
ISSN:2157-7463

Journal of Petroleum & Environmental Biotechnology
Open Access

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Research Article

Enhancement of Hydrocarbons Degradation by Use of Pseudomonas Biosurfactants and Biofilms

Amina Meliani1* and Ahmed Bensoltane2
1Laboratory of Research of Biological Systems and Geomatic, Department of Biology, Faculty of Science, University Mascara, 29000, Mascara, Algeria
2Laboratory of Food and Industrial microbiology, Department of Biology, Faculty of Science, University Oran (Es-senia),31000 Oran, Algeria
Corresponding Author : Amina Meliani
Laboratory of Research of Biological Systems and Geomatic
Department of Biology, Faculty of Science
University Mascara, 29000, Mascara, Algeria
Tel: 213-45-804169
Fax: 213-45-804164
E-mail: [email protected]
Received February 24, 2014; Accepted March 27, 2014; Published April 05, 2014
Citation: Meliani A, Bensoltane A (2014) Enhancement of Hydrocarbons Degradation by Use of Pseudomonas Biosurfactants and Biofilms. J Pet Environ Biotechnol 5:168. doi:10.4172/2157-7463.1000168
Copyright: © 2014 Meliani A, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
 

Abstract

Biofilm-mediated bioremediation presents a proficient alternative to bioremediation with planktonic microorganisms and are generally associated with microbial hydrocarbons resistance or tolerance. Here we report on the ability of three species of Pseudomonas biofilm-associated cells (P. fluorescens, P. putida and P. aeruginosa) to degrade gasoline (hydrocarbon mixtures), xylene and benzene (monoaromatic compounds) and cyclohexane (cyclic compounds). Changes in biofilm formation and siderophores production were monitored in the presence of different concentrations of benzene and xylene. All strains were able to synthesize biosurfactant compounds and were able to tolerate aromatic hydrocarbon more than the cyclic compounds. Our results indicated that hydrocarbon mixture or gasoline could be better biodegraded by bacterial consortia; P. aeruginosa exhibited the best tolerance to gasoline but not to benzene and cyclohexane. It is interesting to point out that P. fluorescens was able to use xylene and benzene even though P. putida was incapable to grow on benzene as a carbon source. Statistically no significant positive correlation (r = 0.94; p > 0.01) between biofilm formation and surface tension, whereas with E24 and cells hydrophobicity we signaled a linear negative relationship (r = - 93, r = - 086). This study is essential since Pseudomonas biofilms are found to have implication in bioremediation of hydrocarbons.

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