Biosurfactant production by bacillus salmalaya for lubricating oil solubilization and biodegradation
Document Type
Article
Publication Date
8-19-2015
Abstract
This study investigated the capability of a biosurfactant produced by a novel strain of Bacillus salmalaya to enhance the biodegradation rates and bioavailability of organic contaminants. The biosurfactant produced by cultured strain 139SI showed high physicochemical properties and surface activity in the selected medium. The biosurfactant exhibited a high emulsification index and a positive result in the drop collapse test, with the results demonstrating the wetting activity of the biosurfactant and its potential to produce surface-active molecules. Strain 139SI can significantly reduce the surface tension (ST) from 70.5 to 27 mN/m, with a critical micelle concentration of 0.4%. Moreover, lubricating oil at 2% (v/v) was degraded on Day 20 (71.5). Furthermore, the biosurfactant demonstrated high stability at different ranges of salinity, pH, and temperature. Overall, the results indicated the potential use of B. salmalaya 139SI in environmental remediation processes.
Keywords
Biosurfactant, Bioremediation, Lubricating oil, Solubilization activity
Divisions
Science
Publication Title
International Journal of Environmental Research and Public Health
Volume
12
Issue
8
Publisher
MDPI