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Online estimation of assimilable nitrogen by electrical conductivity measurement during alcoholic fermentation in enological conditions

Paper ID Volume ID Publish Year Pages File Format Full-Text
22343 43270 2007 7 PDF Available
Title
Online estimation of assimilable nitrogen by electrical conductivity measurement during alcoholic fermentation in enological conditions
Abstract

The monitoring of alcoholic fermentation under enological conditions is currently poor due to the lack of sensors for online measurements. Such monitoring is currently limited to the measurement of CO2 production or changes in density. In this study, we determined the potential value of measuring electrical conductivity. We showed that this measurement is related to the assimilation of nitrogen, which is typically the limiting nutrient, and directly correlated to ammoniacal nitrogen assimilation at any percentage of ammoniacal nitrogen in the medium. We also used electrical conductivity for the very precise monitoring of the kinetics of nitrogen assimilation after the addition of a pulse of diammonium hydrogen phosphate (DAP) during fermentation. The impact of initial conditions (e.g., must composition, grape variety, pH) remains unclear, but the robustness, precision and low price of the sensor used justify further studies of the potential value of measuring electrical conductivity on the pilot and industrial scales.

Keywords
electrical conductivity; alcoholic fermentation; wine; nitrogen; yeast
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Online estimation of assimilable nitrogen by electrical conductivity measurement during alcoholic fermentation in enological conditions
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Bioscience and Bioengineering - Volume 103, Issue 3, March 2007, Pages 229–235
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
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us