Continuous culture of Streptococcus cremoris on lactose using various medium conditions

Growth of a lactic streptococcus was studied in continuous cultures, under various conditions of medium richness, without carbon source limitation, and with a large range of dilution rates. Increasing the concentrations of growth factors and protein nitrogen sources resulted in increased volumetric...

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Bibliographic Details
Published in:Applied microbiology and biotechnology 1989-12, Vol.32 (2), p.155-159
Main Authors: Bibal, B, Kapp, C, Goma, G, Pareilleux, A
Format: Article
Language:English
Subjects:
Biological and medical sciences
Biotechnology
culture media
Fundamental and applied biological sciences. Psychology
growth rate
Lactococcus lactis subsp. cremoris
lactose
Methods. Procedures. Technologies
Microbial engineering. Fermentation and microbial culture technology
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Summary:Growth of a lactic streptococcus was studied in continuous cultures, under various conditions of medium richness, without carbon source limitation, and with a large range of dilution rates. Increasing the concentrations of growth factors and protein nitrogen sources resulted in increased volumetric productivities of biomass and lactic acid with maximum values in the 0.3-0.4 h-1 dilution rate range. Growth was shown to be dependent on both the inhibitory effect of lactic acid and the availability of certain nutrients, as has previously been shown for batch cultures.
ISSN:0175-7598
1432-0614
DOI:10.1007/BF00165880