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- Title
USE OF BUTTER MILK AND POULTRY-TRANSFORMING WASTES FOR ENHANCED PRODUCTION OF Bacillus subtilis SPB1 BIOSURFACTANT IN SUBMERGED FERMENTATION.
- Authors
Zouari, Raida; Ellouze-Chaabouni, Semia; Ghribi-Aydi, Dhouha
- Abstract
Biosurfactants are valuable microbial amphiphilic molecules with effective surface-active and biological properties applicable to several industries and processes. Microorganisms synthesize them, especially during growth on water-immiscible substrates, providing an alternative to chemically prepared conventional surfactants. Microbial surfactants are not yet a sustainable alternative to chemically synthesized surfactants seeing their potentially high production charges. This study highlights the use of low-cost agro-industrial raw material for fermentative production of biosurfactants. The Box-Behnken Design and response surface methodology were employed to optimize the concentrations of the ratio butter milk /distilled water, poultry-transforming wastes and inoculum size for lipopeptide biosurfactant production by B.subtilis SPB1 in submerged fermentation. The best production yield was about 12.61 ± 0.7 g/L of crude lipopeptide biosurfactant. It can be obtained when using a ratio butter milk /distilled water of 1.5, poultry-transforming wastes of 23g/L and an inoculum size of 0.12. In comparison to the highest biosurfactant production yield reported for Bacillus subtilis SPB1, three fold increases were obtained.
- Subjects
BUTTERMILK; POULTRY industry; BACILLUS subtilis; MICROBIAL surfactants; FERMENTATION; AMPHIPHILES; SUBSTRATES (Materials science)
- Publication
Journal of Microbiology, Biotechnology & Food Sciences, 2015, Vol 4, Issue 5, p462
- ISSN
1338-5178
- Publication type
Article
- DOI
10.15414/jmbfs.2015.4.5.462-466