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Study of High Power Ultrasound for Oak Wood Barrel Regeneration: Impact on Wood Properties and Sanitation Effect

1
Université Bordeaux, ISVV, EA 4577, Unité de recherche Œnologie, F-33882 Villenave d’Ornon, France
2
Dyogena, 33290 Blanquefort, France
3
Amarante Process, ADERA, 33600 Pessac, France
*
Author to whom correspondence should be addressed.
Beverages 2019, 5(1), 10; https://doi.org/10.3390/beverages5010010
Received: 21 December 2018 / Revised: 9 January 2019 / Accepted: 16 January 2019 / Published: 1 February 2019
(This article belongs to the Special Issue Wine Aging Technologies)
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Abstract

This study aims to investigate the ability of high power ultrasound (HPU) to ensure oak barrel sterilization and wood structure preservation. Optimization was performed in terms of temperature and time and the impact of the HPU process on the porous material was also characterized. In this research, several wood characteristics were considered, such as the specific surface area, hydrophobicity, oxygen desorption and spoilage microorganisms after treatment. The study showed that the microbial stabilization could be obtained with HPU 60 °C/6 min. The results obtained show that microorganisms are impacted up to a depth of 9 mm, with a Brettanomyces bruxellensis population < 1 log CFU/g. The operating parameters used during the HPU treatment can also impact on wood exchange surface and oxygen desorption kinetics indicating that tartrate is removed. Indeed, the total oxygen desorption rate was recovered after HPU treatment, close to a new oak barrel, and thus may indicate that there is no impact on the ultrastructure (vessel, pore size or rays). Finally, wood wettability can also be impacted, depending on the temperature and the duration of exposure. View Full-Text
Keywords: high power ultrasound; wine aging; regeneration; sanitation; brettanomyces; oak wood barrel high power ultrasound; wine aging; regeneration; sanitation; brettanomyces; oak wood barrel
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Breniaux, M.; Renault, P.; Meunier, F.; Ghidossi, R. Study of High Power Ultrasound for Oak Wood Barrel Regeneration: Impact on Wood Properties and Sanitation Effect. Beverages 2019, 5, 10.

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