Use of fresh versus frozen or blast-frozen grapes for small-scale fermentation
Use of fresh versus frozen or blast-frozen grapes for small-scale fermentation
Background: This paper firstly examines the validity of using laboratory-scale fermentations as a means of correlating winemaking outcomes with larger industrial scale fermentations. Secondly, conventional and blast-freezing of whole bunches were investigated for their relative suitability as methods of preservation as determined by the nature of the resulting wines. Methods: Red must fermentations were compared at the laboratory 80 kg scale, and the more industrially representative 500 kg pilot scale. Fermentation profiles and duration for both scales were found to be very similar. Whole bunches were either slow/conventionally frozen (-20°C), or quickly/blast-frozen (-25°C). Results: Wines made from frozen grapes compared well with the wine made from the fresh must. Color and chemical analyses of the wines revealed few differences. A duo-trio sensory evaluation showed that wine from blast-frozen grapes was more similar to the fresh wines than wines from conventional frozen grapes. Conclusion: The findings of this research suggest that whole-bunch blast-freezing of grapes is preferable to conventional freezing.
Frozen grapes, Research winemaking, Wine color
25-30
Schmid, Frank
d418e84a-23c5-4f39-a5a1-303e56aea2f8
Jiranek, Vladimir
8e5a8dfd-f5b2-43e3-928b-11dff324abc7
2011
Schmid, Frank
d418e84a-23c5-4f39-a5a1-303e56aea2f8
Jiranek, Vladimir
8e5a8dfd-f5b2-43e3-928b-11dff324abc7
Schmid, Frank and Jiranek, Vladimir
(2011)
Use of fresh versus frozen or blast-frozen grapes for small-scale fermentation.
International Journal of Wine Research, 3 (1), .
(doi:10.2147/IJWR.S23325).
Abstract
Background: This paper firstly examines the validity of using laboratory-scale fermentations as a means of correlating winemaking outcomes with larger industrial scale fermentations. Secondly, conventional and blast-freezing of whole bunches were investigated for their relative suitability as methods of preservation as determined by the nature of the resulting wines. Methods: Red must fermentations were compared at the laboratory 80 kg scale, and the more industrially representative 500 kg pilot scale. Fermentation profiles and duration for both scales were found to be very similar. Whole bunches were either slow/conventionally frozen (-20°C), or quickly/blast-frozen (-25°C). Results: Wines made from frozen grapes compared well with the wine made from the fresh must. Color and chemical analyses of the wines revealed few differences. A duo-trio sensory evaluation showed that wine from blast-frozen grapes was more similar to the fresh wines than wines from conventional frozen grapes. Conclusion: The findings of this research suggest that whole-bunch blast-freezing of grapes is preferable to conventional freezing.
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Published date: 2011
Keywords:
Frozen grapes, Research winemaking, Wine color
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Local EPrints ID: 482584
URI: http://eprints.soton.ac.uk/id/eprint/482584
PURE UUID: 10590649-6537-4e4e-bc93-d57a9217b80c
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Date deposited: 10 Oct 2023 16:59
Last modified: 18 Mar 2024 04:12
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Author:
Frank Schmid
Author:
Vladimir Jiranek
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