Scalable temperature induced stress for the large-scale production of functionalized Bifidobacteria.

Abstract:

:The application of sub-lethal stresses is known to be an efficient strategy to enhance survival of probiotic bacteria during drying processes. In this context, we previously showed that the application of heat stress upon the entry into stationary phase increased significantly the viability of Bifidobacterium bifidum. However, this heat shock has been considered only in small-scale bioreactor and no information is available for a possible scaling-up strategy. Five different operating scales (0.2, 2, 20, 200 and 2000 L) have thus been tested and the results showed that the viability of B. bifidum increases from 3.15 to 6.57 folds, depending on the scale considered. Our observations pointed out the fact that the heat stress procedure is scalable according to the main outcome, i.e., increases in cell viability, but other factors have to be taken into account. Among these factors, dissolved carbon dioxide seems to play a significant role, since it explains the differences observed between the test performed at laboratory scale and in industrial conditions.

authors

Nguyen HT,Razafindralambo H,Richel A,Jacquet N,Evrard P,Antoine P,Thonart P,Delvigne F

doi

10.1007/s10295-015-1650-5

subject

Has Abstract

pub_date

2015-09-01 00:00:00

pages

1225-31

issue

9

eissn

1367-5435

issn

1476-5535

journal_volume

42

pub_type

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