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A model based on factorial design to predict the evolution of Brettanomyces sp. population as function of environmental conditions in winemaking

Brandam, Cédric and Castro Martinez, Claudia and Ramón Portugal, Felipe and Strehaiano, Pierre A model based on factorial design to predict the evolution of Brettanomyces sp. population as function of environmental conditions in winemaking. (2006) In: 4th International function of environmental conditions in winemaking, 15-17 juin 06, Italie .

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Abstract

Contamination of wines by Brettanomyces is an increasing industrial problem. Here, we propose a model able to predict the evolution of a Brettanomyces population as function of environmental conditions as temperature, ethanol concentration or dioxide sulfur concentration. Polynomial models obtained from factorial design realized on synthetic medium gave the lag phase, the specific growth rate and the maximal biomass concentration as function of these medium factors. A logistic model was then used with the determined growth parameters to represent the evolution of Brettanomyces population. The factorial design showed that temperature has an important effect on maximal biomass concentration and specific growth rate but a negligible effect on lag phase. Conversely, molecular sulfur dioxide had an important effect on lag phase but a little influence on growth parameters. Ethanol concentration played an important role on the three parameters tested.

Item Type:Conference or Workshop Item (Paper)
Audience (conference):International conference proceedings
Uncontrolled Keywords:
Institution: Université de Toulouse > Institut National Polytechnique de Toulouse - INPT
Université de Toulouse > Université Paul Sabatier-Toulouse III - UPS
French research institutions > Centre National de la Recherche Scientifique - CNRS
Laboratory name:
Laboratoire de Génie Chimique - LGC (Toulouse, France) - Bioprocédés et systèmes microbiens (BioSyM)
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Deposited By: Guylène Abadie

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