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Enhancement of Surfactin Yield by Improving the Medium Composition and Fermentation Process

Willenbacher, Judit; Yeremchuk, Wladimir; Mohr, Teresa; Syldatk, Christoph; Hausmann, Rudolf

Abstract:
Surfactin is one of the most promising biosurfactants due to its extraordinary surface activity. Commonly, the well-established Cooper medium, a glucose-based mineral salt medium, is utilized for the microbial production of Surfactin. The current study investigated the enhancement of Surfactin yields by analyzing the effects of different glucose concentrations, next to the introduction of an alternative chelating agent and nitrogen source. The utilization of 8 g/L glucose, 0.008 mM Na3citrate and 50 mM (NH4)2SO4 increased Surfactin yields from 0.7 to 1.1 g/L during shake flask experiments applying Bacillus subtilis DSM10(T). Consequentially conducted shake flask experiments, employing five other Surfactin producer strains during cultivation in the former and enhanced version of the Cooper medium, suggest a general enhancement of Surfactin yields during application of the enhanced version of the Cooper medium. The enhancement of the medium composition is therefore most likely independent from the employed producer strain. The following utilization of the enhanced medium composition during fed-batch fermentation with integrated foam f ... mehr


Zugehörige Institution(en) am KIT Institut für Bio- und Lebensmitteltechnik (BLT)
Publikationstyp Zeitschriftenaufsatz
Jahr 2015
Sprache Englisch
Identifikator DOI: 10.1186/s13568-015-0145-0
ISSN: 2191-0855
URN: urn:nbn:de:swb:90-494640
KITopen ID: 1000049464
Erschienen in AMB Express
Band 5
Heft 1
Seiten Article Nr. 57, 9 S.
Bemerkung zur Veröffentlichung Gefördert durch den KIT-Publikationsfonds
Schlagworte Surfactin, Medium, Glucose, Bacillus subtilis, Fermentation, Fed-batch
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