Journal
LWT-FOOD SCIENCE AND TECHNOLOGY
Volume 65, Issue -, Pages 1038-1043Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.lwt.2015.09.046
Keywords
Non-Saccharomyces yeasts; Volatile acidity; Alcohol level reduction; Sugar respiration; Aerated fermentation
Categories
Funding
- MINECO from the Spanish Government [AGL2012-32064, RTC-2014-2186-2]
- INIA from the Spanish Government [RM2012-00007-00-00]
- MINECO
- Erasmus Program grant - EU
Ask authors/readers for more resources
We have recently shown that ethanol yields in winemaking can be reduced by taking advantage of the respiratory metabolism of some non-Saccharomyces yeast species. Using an orthogonal design we have now addressed the impact of three environmental factors (temperature, nitrogen source, and oxygen supply level) on the aerobic metabolism in synthetic must of Saccharomyces cerevisiae, Metschnikowia pulcherrima, Kluyveromyces lactis, and Candida sake. An integrative parameter, Efficacy (efficacy for alcohol level reduction) was designed to simplify comparisons between strains or growth conditions. It integrates sugar consumption, ethanol yield, and acetic acid production data. We found a high relative impact of nitrogen source availability and temperature, as compared to aeration conditions, for several fermentation parameters, including ethanol yield. However, increasing oxygen supply showed a positive impact in terms of alcohol reduction and Efficacy for all the strains tested. The best results across assays were obtained for C sake CBS 5093, with high sugar consumption rates, associated to low ethanol yields, and very low acetic acid production. Processes involving this yeast strain would benefit from high aeration levels and low nitrogen source availability; while fermentation temperatures would have little impact on its Efficacy for alcohol level reduction. (C) 2015 Elsevier Ltd. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available