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Stoichiometry of diauxic growth of a xylanase-producing Bacillus strain.

Schneider, Gerhard and Taillandier, Patricia and Strehaiano, Pierre Stoichiometry of diauxic growth of a xylanase-producing Bacillus strain. (2000) Canadian journal of microbiology, 46 (9). 784-789. ISSN 0008-4166

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Official URL: https://doi.org/10.1139/w00-064

Abstract

In this work, the establishment of material balances and stoichiometry of the growth of Bacillus sp. was undertaken. This strain produces high quantities of a xylanase suitable for use as bleach boost agent in chlorine-free bleaching sequences of paper pulp. As carbon dioxide plays an important role as a growth factor, bacterial growth in two fermentations, one fed with air and another fed with carbon-dioxide-enriched air, were compared. For this purpose, a method permitting the determination of the consumption of the two carbon sources, xylan and peptone, was proposed. The material balances revealed that in both cases, the bacteria first use peptone as their carbon source, and then xylan in the second part of the growth phase. The aerated culture showed diauxic growth on these two substrates, whereas carbon-dioxide-enriched air caused disappearance of the metabolic adaptation phase, and rendered biomass production more economic. The fermentation fed with air needed 30% more xylan than the fermentation fed with carbon-dioxide-enriched air for the same quantity of biomass produced.

Item Type:Article
HAL Id:hal-02135098
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UPS (FRANCE)
Laboratory name:
Funders:
European Union
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Deposited By: Michel Aressy
Deposited On:04 Apr 2019 08:32

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