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Bioemulsifier production by a halothermophilic Bacillus strain with potential applications in microbially enhanced oil recovery

Biomedical Sciences Research Institute Computer Science Research Institute Environmental Sciences Research Institute Nanotechnology & Advanced Materials Research Institute

Dastgheib, S. M. M., Amoozegar, M. A., Elahi, E., Asad, S. and Banat, Ibrahim (2008) Bioemulsifier production by a halothermophilic Bacillus strain with potential applications in microbially enhanced oil recovery. BIOTECHNOLOGY LETTERS, 30 (2). pp. 263-270. [Journal article]

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DOI: 10.1007/s10529-007-9530-3

Abstract

A halothermotolerant Gram-positive spore-forming bacterium was isolated from petroleum reservoirs in Iran and identified as Bacillus licheniformis sp. strain ACO1 by phenotypic characterization and 16S rRNA analysis. It showed a high capacity for bioemulsifier production and grew up to 60 degrees C with NaCl at 180 g 1(-1). The optimum NaCl concentration, pH and temperature for bioemulsifier production were 4% (w/v), 8.0, and 45 degrees C, respectively. Although ACO1 did not utilize hydrocarbons, it had a high emulsifying activity (E (24) = 65 +/- 5%) on different hydrophobic substrates. Emulsification was optimal while growing on yeast extract as the sole carbon source and NaNO3 as the nitrogen source. The efficiency of the residual oil recovery increased by 22% after in situ growth of B. licheniformis ACO1 in a sand-pack model saturated with liquid paraffin.

Item Type:Journal article
Faculties and Schools:Faculty of Life and Health Sciences
Faculty of Life and Health Sciences > School of Biomedical Sciences
Research Institutes and Groups:Biomedical Sciences Research Institute
Biomedical Sciences Research Institute > Pharmaceutical Science and Practice
ID Code:4126
Deposited By:Professor Ibrahim Banat
Deposited On:08 Jan 2010 15:00
Last Modified:16 May 2012 11:20

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