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Control of bubble-free oxygenation with silicone tubing during alcoholic fermentation

Paper ID Volume ID Publish Year Pages File Format Full-Text
34539 45033 2013 9 PDF Available
Title
Control of bubble-free oxygenation with silicone tubing during alcoholic fermentation
Abstract

•We design an innovative system for oxygen addition during enological fermentation.•Precise and reproducible oxygen additions are feasible.•Oxygen transfer rate is controlled by the liquid velocity inside the silicone tube.•A mathematical model was developed to calculate OTR from the operating parameters.

The addition of oxygen is a common practice during winemaking to improve fermentation kinetics. However, an important limitation of standard oxygenation systems is that it is difficult to determine the exact quantity of oxygen transferred to wine or must. Tools enabling precise and reproducible oxygen addition would be useful. We developed and validated a bubble-free oxygenation system, at laboratory and pilot scale. In this system, oxygen is added by diffusion through a silicone membrane tube.We evaluated the effects of various parameters on the maximum oxygen transfer rate (OTRm). For fixed characteristics of the silicone tube and the partial pressure, the effects of dissolved CO2 and medium composition were negligible; parameters with the biggest influence on the OTRm were the liquid flow rate and the temperature.These data were used to construct a mathematical model that calculates the OTR as a function of the operating parameters. This phenomenological model allows comprehensive description of physical parameters influencing the OTRm. The model's predictions were very accurate both for the validation experiments in synthetic media and in real fermentation conditions. This work makes a step toward innovative strategies for oxygen management during alcoholic fermentation.

Keywords
Alcoholic fermentation; Oxygen transfer; Bubbleless aeration; Modeling
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Publisher
Database: Elsevier - ScienceDirect
Journal: Process Biochemistry - Volume 48, Issue 10, October 2013, Pages 1453–1461
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
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