Enoforum 2021
IVES 9 IVES Conference Series 9 Enoforum Web 9 Enoforum Web Conference 2021 9 Cellar session 9 Prefermentative CO2 saturation of grape must to obtaining white wines with low SO2 content

Prefermentative CO2 saturation of grape must to obtaining white wines with low SO2 content

Abstract

The objective this work has been study the possibility of partially or completely replacing sulphur in the winemaking of white wines through the use of the prefermentative saturation of musts with CO2. Three types of wines were made from the same Airén and Chardonnay must and under the same conditions: Control wine, reduction of SO2 in half and total reduction of SO2.

No technologically important variations in the usual oenological parameters were observed in freshly bottled wines by saturating the musts with CO2 and decreasing SO2 doses. In terms of color, it should be noted that all wines of both varieties had similar values of luminosity and that the saturation of musts with CO2 produced wines with more green tones and the decrease in doses of SO2 with more yellow notes. In relation to volatile composition, the saturation of musts with CO2 and the reduction of SO2 doses produced wines with higher concentrations of compounds responsible for fruity and floral notes. At the sensory level, the results of volatile analysis were corroborated and both trained tasters and consumers positively valued the wines. Microbial stability and colour were monitored for 12 months, a normal marketing period for young wines, with the following conclusions obtained:

Signs of malolactic fermentation were observed in wines without SO2. However, wines with low doses of SO2 remained perfectly stable. With regard to color after 12 months the wines of both varieties evolve in a favorable way, a slightly more intense color, but no notes of oxidation are seen. Effective control of acetic acid bacteria over time has been proven as the volatile acidity of these wines is similar to that of control wines and does not increase the year of bottling.

DOI:

Publication date: April 23, 2021

Issue: Enoforum 2021

Type: Article

Authors

P.M. Izquierdo Cañas1*, S. Guri Baiget2, E. García Romero1, V. Cejudo Martín de Almagro2, J. Mallen Pomes2

1 Instituto Regional de Investigación y Desarrollo Agroalimentario y Forestal de Castilla-La Mancha (IRIAF), IVICAM, Ctra. Albacete s/n, 13700 Tomelloso, Ciudad Real, Spain.
2 Carburos Metálicos S. A.- Air Products Group. Avda de la Fama 1, 08940 Cornellà de Llobregat, Barcelona, Spain.

Contact the author

Tags

Enoforum 2021 | IVES Conference Series

Citation

Related articles…

Investigation on the potentiality of a biostimulant by Fabaceae tissues and rich in triacontanol to enhance grapevine resilience under drought stress

The primary objective of this research was to investigate the potential benefits of a Fabaceae-based product rich in triacontanol (a long-chain alcohol) applied to Vitis vinifera cv. Merlot, on key physiological and productive parameters of grapevines under controlled water stress conditions.
Read More

Towards an ecological architecture inspired by underground cellars: An example of the thermal inertia of Moldovan underground cellars and new geothermal and Canadian well approaches

The search for underground shelters is one of the oldest forms of human habitation, providing refuge in extreme environments such as deserts and polar regions.

Read More

Diversity and internationalization of wine grape varieties: Evidence from a revised global database

Aim: To quantify the extent to which national mixes of wine grape varieties (in terms of vineyard bearing area) have become more or less diversified, and ‘internationalized’, since wine globalization accelerated from the 1990s.

Read More

Viti-Tunnel, an automatically removable protection against diseases, frost and hail, a way to drastically reduce the use of pesticides

Viti-tunnel®, une innovation imaginée pour répondre à deux des objectifs majeurs des viticulteurs : 1.la sécurisation de la vendange : viti-tunnel® permet de protéger les vignobles des pertes de récolte dues aux maladies, au gel et à la grêle. 2.la réduction des pesticides : viti-tunnel® permet de réduire de plus de 90 %, le recours aux produits phytosanitaires et aux passages de pulvérisateurs, et ce, en toute sécurité pour la vendange. Un dispositif automatisé pour protéger les vignes viti-tunnel® est un dispositif de mise à l’abri automatique des rangs de vigne pendant les pluies et les évènements climatiques extrêmes.

Read More

Contribution of Piperitone to the mint nuances perceived in the aging bouquet of red Bordeaux wines

During the tasting of a fine, old wine, the aromas generated in the glass are intertwined in an intimate, complex manner, expressing the fragrance of the aging bouquet. This aging bouquet, which develops during bottle storage through a complex transformation process, may result in a broad palette of nuances. Among these, undergrowth, truffle, toasted, spicy, licorice, fresh red- and black-berry fruit and mint descriptors were recently identified as features of its olfactory representation for red Bordeaux wines. Although a targeted chemical approach focusing on volatile sulfur compounds revealed the role played by dimethyl sulfide, 2-furanmethanethiol, and 3-sulfanylhexanol as molecular markers of the typicality of the wine aging bouquet of red Bordeaux wines, its chemical transcription has only partially been elucidated.

Read More