Biosurfactant production by bacillus salmalaya for lubricating oil solubilization and biodegradation

Dadrasnia, A. and Ismail, S. (2015) Biosurfactant production by bacillus salmalaya for lubricating oil solubilization and biodegradation. International Journal of Environmental Research and Public Health, 12 (8). pp. 9848-9863. ISSN 1660-4601

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Official URL: http://www.mdpi.com/1660-4601/12/8/9848

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.

Item Type: Article
Uncontrolled Keywords: Biosurfactant; Bioremediation; Lubricating oil; Solubilization activity
Subjects: Q Science > Q Science (General)
Q Science > QH Natural history
Divisions: Faculty of Science
Depositing User: Ms. Juhaida Abd Rahim
Date Deposited: 04 Nov 2015 09:09
Last Modified: 30 Dec 2015 03:59
URI: http://eprints.um.edu.my/id/eprint/14508

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