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Kinetic modeling of kefiran production in mixed culture of Lactobacillus kefiranofaciens and Saccharomyces cerevisiae

Paper ID Volume ID Publish Year Pages File Format Full-Text
36011 45118 2007 10 PDF Available
Title
Kinetic modeling of kefiran production in mixed culture of Lactobacillus kefiranofaciens and Saccharomyces cerevisiae
Abstract

Growth and kefiran production rates of Lactobacillus kefiranofaciens were significantly enhanced in a mixed culture with Saccharomyces cerevisiae as compared with those in a pure culture. Because a positive effect on growth and kefiran production of L. kefiranofaciens in a mixed culture was observed, the elucidation of interaction between L. kefiranofaciens and S. cerevisiae may lead to higher productivity. Hence, microbial performance of each strain was investigated and analyzed by a mathematical model. The mathematical model for kefiran fermentation in a mixed culture of L. kefiranofaciens and S. cerevisiae was established, and the impact of S. cerevisiae on cell growth, kefiran formation, and substrate assimilation of L. kefiranofaciens were considered. The behavior of L. kefiranofaciens in a mixed culture was predicted using a developed mathematical model in this work, and the predictions were compared with the results from mixed culture experiments. The overall mathematical model is capable of describing the behavior of S. cerevisiae in a mixed culture as a lactic acid consumer, nitrogen source competitor and protective function inducer for L. kefiranofaciens. Furthermore, the constructed model described the phenomena in mixed cultures under aerobic and anaerobic conditions. Finally, the optimal inoculation ratios of S. cerevisiae to L. kefiranofaciens at 7-fold and 10-fold under aerobic and anaerobic conditions were obtained by applying the mixed culture model, respectively.

Keywords
Fermentation; Kefiran; Kinetics; Lactic acid bacteria; Mixed culture; Model
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Kinetic modeling of kefiran production in mixed culture of Lactobacillus kefiranofaciens and Saccharomyces cerevisiae
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Publisher
Database: Elsevier - ScienceDirect
Journal: Process Biochemistry - Volume 42, Issue 4, April 2007, Pages 570–579
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us