Microbial Biodegradation of Aromatic Compounds in a Soil Contaminated with Gasohol.
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Date
2011-07
Journal Title
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Abstract
The studies developed in this work aimed to find alternatives to biodegradation or
bioremediation of soils contaminated with gasoline or gasohol. So, the biodegradation of
benzene, toluene and o-xylene (BTX) in soil samples contaminated with gasoline or
gasohol by a bacterial consortium was studied. Four bacterial strains were selected for the
consortium based on their growth capacity in gasoline, gasohol and BTX as sole carbon
sources, and on the production of biosurfactants in mineral medium containing gasohol as
the sole carbon source. The reduction of TX concentrations in soil slurries in a multi-cell
bioreactor system was used as the criterion to evaluate biodegradation efficiency. BTX
removal was highly stimulated by air injection and mineral nutrients, and was significantly
increased by the presence of the bacterial consortium. Addition of a proprietary oxygen
release compound did not stimulate the biodegradation of BTX.
Description
Keywords
Bioremediation, Biodegradation, Hydrocarbons, Bacterial consortium, ORC
Citation
Parreira A G, Tótola M R, Jham G N, Da Silva S L, Borges A C. Microbial Biodegradation of Aromatic Compounds in a Soil Contaminated with Gasohol. British Biotechnology Journal. 2011 Jul; 1(2): 18-28.