terclim by ICS banner
IVES 9 IVES Conference Series 9 OIV 9 OIV 2024 9 Orals - Oenology, methods of analysis 9 “Gentle” sustainable extraction from whole berry by using resonance waves and slight over CO2 overpressure

“Gentle” sustainable extraction from whole berry by using resonance waves and slight over CO2 overpressure

Abstract

The traditional methods of grape extraction of enochemical compounds use very often mechanical energy by pistons such as the pigeage or mechanical energy produced by must (delestage, pumping over). Recent trend by winemaker is trying to introduce in the fermentation tank, whole berry grape to avoid even minimal oxidation. Unfortunately, the use of the traditional mechanical techniques aforementioned, very often does not guarantee the optimal extraction of polyphenols and above all does not assure an uniform temperature in the vessel. Use of resonance waves (AM =AIRMIXING MI TM) or a slight overpressure by CO2 (ADCFTM) permits to work on whole berry guaranteeing the perfect extraction and homogenize the temperature and the oxygen in all the mass. In AM, the great goal to have an uniform temperature in all the tank, permits the winemaker to decide which temperature using to ferment and to extract depending on the wine style she/he wants to reach. This presentation we will summarize data on experimental works done with these two techniques and we show, beyond the theoretical explanation, the kinetic of extraction of different phenol classes and of volatile organic compounds even in the production of wine without sulfite addition.

Estrazione gentile e sostenibile da acino intero utilizzando onde di risonanza e sovrapressione

I metodi tradizionali di estrazione dei composti enochimici dall’uva utilizzano molto spesso l’energia meccanica mediante pistoni come il pigeage o l’energia meccanica prodotta dal mosto (delestage, rimontaggi). La recente tendenza dell’enologo sta cercando di introdurre nel serbatoio di fermentazione l’uva a bacca intera per evitare anche la minima ossidazione. Purtroppo, l’utilizzo delle tradizionali tecniche meccaniche sopra citate, molto spesso non garantiscono l’estrazione ottimale con rimanenza di zuccheri residui nelle vinacce. L’utilizzo di onde di risonanza (airmixingtm) e una leggera sovrapressione da parte di CO2 (adcftm) permettono di lavorare sull’acino intero garantendo la perfetta estrazione. In questa presentazione presenteremo i dati di un lavoro sperimentale svolto con queste due tecniche in cui mostriamo, oltre alla spiegazione teorica, la cinetica di estrazione di diverse classi fenoliche e anche di composti organici volatili anche nella produzione di vino senza aggiunta di solfiti.

Extraction douce et durable de baies entières par ondes de résonance et surpression

Les méthodes traditionnelles d’extraction des composés œnochimiques du raisin utilisent très souvent de l’énergie mécanique par pistons comme le pigeage ou de l’énergie mécanique produite par le moût (délestage, remontage). La tendance récente des vignerons consiste à introduire dans la cuve de fermentation des raisins à baies entières pour éviter même une oxydation minime. Malheureusement, l’utilisation des techniques mécaniques traditionnelles évoquées plus haut, ne garantit bien souvent pas une extraction optimale des sucres résiduels dans le marc. L’utilisation d’ondes de résonance (airmixingtm) et d’une légère surpression de CO2 (adcftm) permettent de travailler sur baie entière garantissant une extraction parfaite. Dans cette présentation nous présenterons les données d’un travail expérimental réalisé avec ces deux techniques où nous montrons, au-delà de l’explication théorique, la cinétique d’extraction de différentes classes de phénols ainsi que de composés organiques volatils même dans la production de vin sans ajout de sulfites.

DOI:

Publication date: November 18, 2024

Issue: OIV 2024

Type: Article

Authors

Fabio Mencarelli¹, Giuseppe Floridia², Stefano Pettinelli¹, Andrea Uliva²

¹ Wine research consultant, Via Poggio di Montemagno 19, Calci (PI), Italy
² Parsec SRL, Italy

Contact the author*

Tags

Full papers OIV 2024 | IVES Conference Series | OIV | OIV 2024

Citation

Related articles…

Armenia: historical origin of domesticated grapevine

The Armenian highlands are located on the northern border of western asia and stretch up to the caucasus from the north. Throughout human history, country has played an important role in connecting the civilizations of europe and the near east. The recent large-scale study about the dual domestication origin and evolution of grapes approved that in the Armenian highlands human and grapevine stories are interlaced through centuries and roots of grapevine domestication are found deep in the pleistocene, ending 11.5 thousand years ago. Findings of this study confirmed that glacial episodes distinguish wild grapes into eastern and western ecotypes around 200-400 ka.

An effective approach to mitigating ochratoxin A (OTA) levels in wine with minor impact on wine quality

OTA occurrence in wine is well-documented, with higher levels typically found in red (< 0.01-7.63 μg/l), followed by rose (0.01-2.40 μg/l) and white wine (<0.01-1.72 μg/l). Incidence rates are nOTAble, with studies showing OTA present in 53% of 521 red wines, 69% of 98 rose, and 61% of 301 white wines analysed. In europe, wine is estimated to be the second source of OTA intake after cereals. Since 2006, the maximum allowable limit for OTA in wine is 2 μg/l, according to regulation (ec) no. 1881/2006.

Bioprotection en phase pré-fermentaire, synthèse de 3 ans d’expérimentations dans différentes régions viticoles

With growing consumer interest in products without chemical additives, limiting the use of sulfites is a priority for the wine industry. Bioprotection is a biological alternative that avoids or reduces the risks of alterations that have a negative impact on the organoleptic quality of wines and, ultimately, on their acceptability to consumers. bioprotection can also provide a response to the risks of microbiological deviations, which are increased both by climate change and by the organization of harvesting operations, which increasingly include the use of multi-bins filled at the vine, exposing the harvest to sometimes high temperatures for longer periods of time.

Effect of different plant fibers on the elimination of undesirable compounds in red wine 

The presence of undesirable compounds in wines, such as ota, biogenic amines and pesticides residues, affects wine quality and can cause health problems for the consumer. Additionally, an excess of tannins can produce an undesirable increase in the astringency and bitterness of the wine, so tannins are also a target for reduction. The main tool that a winemaker has to reduce their content in the wine is fining. However, some of the fining agents commonly used in the winery can cause allergies or even increase the protein content in the wine, increasing the turbidity.

Validation of a method for the determination of volatile compounds in in spirituous beverages using contained ethanol as a reference substance

The results of experimental studies of the method based on the usage of ethyl alcohol as an internal standard for the direct determination of volatile compounds in wines and others alcohol contained products are presented. The method was validated in terms of precision, accuracy, limits of detection and quantification (lod and loq), linearity, and robustness.