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Production of concentrated Streptococcus salivarius subsp. thermophilus by coupling continuous fermentation and ultrafiltration

Published online by Cambridge University Press:  01 June 2009

Claudine Prigent ,
Christian Corre  and
Patrick Boyaval
Claudine Prigent
Affiliation:
Laboratoire de Recherches de Technologie Laitière, INRA, 65, rue de Saint-Brieuc, 35042 Rennes Cedex, France
Christian Corre
Affiliation:
Laboratoire de Recherches de Technologie Laitière, INRA, 65, rue de Saint-Brieuc, 35042 Rennes Cedex, France
Patrick Boyaval
Affiliation:
Laboratoire de Recherches de Technologie Laitière, INRA, 65, rue de Saint-Brieuc, 35042 Rennes Cedex, France
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Summary

Continuous production of concentrated cells of Streptococcus salivarius subsp. thermophilus was achieved in a continuous stirred tank reactor coupled with an ultrafiltration module. A cellular productivity nine times higher than that obtained by conventional methods was observed. The viability of the cells produced was as satisfactory as that obtained by classical culture, but an increase in latency time and a slight decrease in acidification rate during downstream tests in milk were observed. Specific lactic acid productivity decreased as biomass increased. This process produced concentrated starters and lactic acid which could be purified by a downstream processing such as electrodialysis.

Type
Original articles
Information
Journal of Dairy Research , Volume 55 , Issue 4 , November 1988 , pp. 569 - 577
Copyright
Copyright © Proprietors of Journal of Dairy Research 1988

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