Journal
APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY
Volume 177, Issue 2, Pages 346-361Publisher
HUMANA PRESS INC
DOI: 10.1007/s12010-015-1746-4
Keywords
Bacillus licheniformis; Biosurfactant; Lichenysin; Microbial enhanced oil recovery
Funding
- M.S. University of Baroda
- Institute of reservoir studies, Oil and Natural Gas Corporation Ltd., India
Ask authors/readers for more resources
The biosurfactant produced by Bacillus licheniformis R2 was characterized and studied for enhancing the heavy crude oil recovery at 80 A degrees C in coreflood experiments. The strain was found to be nonpathogenic and produced biosurfactant, reducing the surface tension of medium from 70 to 28 mN/m with 1.1 g/l yield. The biosurfactant was quite stable during exposure to elevated temperatures (85 A degrees C for 90 days), high salinity (10 % NaCl), and a wide range of pH (5-12) for 10 days. It was characterized as lipopeptide similar to lichenysin-A, with a critical micelle concentration of about 19.4 mg/l. The efficiency of crude biosurfactant for enhanced oil recovery by core flood studies revealed it to recovering additional 37.1 % oil from Berea sandstone cores at 80 A degrees C. The results are indicative of the potential for the development of lipopeptide biosurfactant-based ex situ microbial enhanced heavy oil recovery from depleting oil fields with extreme temperatures.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available