FOOD PROCESSING: ENHANCING WINE QUALITY AND SAFETY

12.09.2023
In the world of agriculture and viticulture, ensuring the safety and quality of grapes and the subsequent wines they yield is of paramount importance. To this end, technological advancements are constantly sought after to mitigate risks associated with microbial contamination, spoilage, and compromised sensory attributes. One such innovation that has gained prominence in recent years is the application of Ultraviolet-C (UVC) light. UVC light's ability to combat microorganisms has led to its adoption in both grape treatment and wine production cellars, revolutionizing the way we approach food safety and quality maintenance.

UVC FOR GRAPE TREATMENT: A SAFER APPROACH TO SANITATION
The journey of grapes from vine to bottle is fraught with microbial challenges. Bacteria and molds can compromise the integrity of grapes and the wines they produce. Traditionally, grape sanitization involves chemical treatments that may have residual effects and can impact the environment. Enter UVC light, a non-chemical alternative that holds promise for enhancing grape safety without leaving behind unwanted traces.
Powdery mildew and other fungal diseases can significantly affect grapevines, leading to reduced yield and compromised grape quality. These pathogens thrive in warm, humid conditions and can spread rapidly, causing powdery white spots on leaves, stems, and clusters. Climate change and warmer temperature conditions can also create a more favorable environment for the growth and spread of the powdery mildew fungus.
Preventing powdery mildew and other fungal diseases on grapes using Ultraviolet-C (UVC) light is an innovative approach that can help mitigate the impact of these pathogens on grape vines.


GRAPE UV-C IRRADIATION IN THE POSTHARVEST PERIOD: A TOOL TO IMPROVE SENSORIAL QUALITY IN ‘CABERNET SAUVIGNON’ WINE
In a scientific study published on the Journal of Food Science and Technology (#59, 2022), Ultraviolet light-C (UV-C) was used in ‘Cabernet Sauvignon’ grapes in the postharvest period to improve the anthocyanin profile and sensory attributes in wine produced with irradiated grapes. Anthocyanins are important compounds in grapes and wine and significantly influence their characteristics. After winemaking and storage time (6 months), ‘Cabernet Sauvignon’ wine produced with grapes irradiated with UVC light presented higher perception scores for visual color, aroma, taste, and was preferred by the tasters over the wine produced with non-irradiated grapes.


UVC APPLICATION IN WINE PRODUCTION CELLARS: ELEVATING HYGIENE STANDARDS
Wine production cellars are hives of activity, where the transformation of grapes into the finest vintages occurs. However, this environment can also be a breeding ground for contaminants that threaten the quality of the end product. Maintaining the cellar disinfected is essential to prevent spoilage, off-flavors, and also the formation of mold on wooden aging barrels and other containers and equipment. Here, UVC light emerges as a powerful tool to bolster hygiene protocols.
Cellar cleaning is an intricate process that involves meticulous attention to detail. By incorporating UVC light, winemakers can enhance their cleaning and sanitation practices, targeting microbes that might persist even after conventional cleaning. UVC light's ability to inactivate microorganisms directly complements traditional cleaning agents and practices, ensuring a higher level of sterilization.

Benefits of UVC Application in Wine Cellars:
  • Microbial Control: UVC light can reach nooks and crannies that might be challenging to access during manual cleaning, effectively reducing microbial populations.
  • Complementary to Cleaning: UVC light works in synergy with traditional cleaning agents, creating a more robust cleaning and sanitation regimen.
  • Time Efficiency: UVC treatment can save time by reducing the need for extended downtime during thorough cleaning sessions.
  • Quality Assurance: By minimizing the risk of contamination, UVC contributes to consistent wine quality and sensory characteristics.


IN CONCLUSION: A BRIGHT FUTURE FOR GRAPE AND WINE SAFETY
The integration of UVC light into grape treatment and wine production cellars marks a significant step forward in the quest for food safety and quality. Its ability to combat microorganisms without relying on chemicals, positions UVC as an environmentally conscious solution with far-reaching implications.
However, successful implementation hinges on meticulous calibration of UVC dosage, exposure time, and consideration of cellar layouts. Light Progress devices for food processing and surfaces and environmental UV-C irradiation are specifically designed for such kind of treatments.
Get in touch with our product specialists for a design proposal and a quote.

F.A.Q.

Ultraviolette Strahlen sind elektromagnetische Wellen, die Teil des Lichts sind. Elektromagnetische Wellen werden in drei Hauptwellenlängenbereiche unterteilt, die in Nanometern (nm) angegeben werden: Ultraviolette Strahlen (UV) 100-400 nm Sichtbare Strahlen (Licht) 400-700 nm Infrarotstrahlen (IR) 700-800.000 nm UV-Strahlen werden wiederum in drei Banden unterteilt:

  • UV-A (315-400 nm) mit bräunenden Eigenschaften;
  • UV-B (280-315 nm) con proprietà terapeutiche e di sintesi della vitamina "D";
  • UV-C (100-280 nm) mit keimtötenden Eigenschaften.

UV-C (100-280 nm) hat eine starke keimtötende Wirkung und ist bei einer Wellenlänge von 265 nm am wirksamsten. Die keimtötende Wirkung der UV-C-Strahlung erstreckt sich auch auf Bakterien, Viren, Sporen, Pilze, Schimmelpilze und Milben; sie ist hauptsächlich auf die zerstörerische Wirkung der UV-C-Strahlung auf ihre DNA zurückzuführen; die UV-C-Strahlen schädigen nämlich ihren Fortpflanzungsapparat und verhindern ihre Vermehrung.

Bakterien, Viren, Sporen, Pilze, Schimmelpilze und Milben sind alle empfindlich gegenüber UV-C und können daher durch UV-C beseitigt werden. Mikroben können keine Resistenz gegen UV-C-Strahlung erwerben, wie es bei der Verwendung von chemischen Desinfektionsmitteln und Antibiotika der Fall ist. UV-Strahlung ist umweltfreundlich. Eine Umweltverschmutzung ist bei der Verwendung normaler Desinfektionsmittel unvermeidlich. Außerdem besteht die Gefahr, dass durch das direkte Einatmen der Dämpfe oder das Verschlucken von Lebensmitteln, die durch den Kontakt mit den chemischen Desinfektionsmitteln verunreinigt wurden, schwerwiegende Schäden entstehen können. In den Bereichen, in denen auf chemische Desinfektionsmittel nicht verzichtet werden kann (Lebensmittelindustrie, Pharmazeutik, Gesundheitswesen usw.), ermöglicht der Einsatz ultravioletter Strahlen bei der Desinfektion eine Verringerung der Desinfektionsmittelmenge mit erheblichen Kosteneinsparungen und größerer Rücksicht auf die Umwelt, wobei der Desinfektionsgrad beibehalten und fast immer verbessert wird. UV-C-Geräte können in Räumen und Maschinen installiert werden und so programmiert werden, dass sie Tag und Nacht den gleichen Desinfektionsgrad aufrechterhalten und somit ideale hygienische Bedingungen ohne Schwankungen gewährleisten. Im Gegensatz dazu entfalten chemische Desinfektionsmittel ihre volle Wirkung erst bei ihrer Anwendung. Bei der Verwendung von mit LIGHT PROGRESS ausgestatteten Geräten sind die Betriebskosten gering; man kann sagen, dass ein 'LIGHT PROGRESS' UV-C-System außer dem normalen Lampenwechsel keine Wartung erfordert. Das Preis-/Leistungs-Verhältnis ist hervorragend, die Geräte sind leistungsstark und haben eine lange Lebensdauer. Deshalb ist die Keimabtötung durch UV-C im Vergleich zu anderen Systemen (oder im Zusammenspiel mit diesen) kostengünstig und hochwirksam.

I raggi UV-C funzionano davvero, se applicati correttamente e con le dovute precauzioni. La differenza fra un progetto di qualità e una applicazione senza risultati è data dalla profonda conoscenza dell'argomento e dall'esperienza acquisita nel tempo. Dal 1987 Light Progress realizza progetti di successo in tutto il mondo e ha acquisito una clientela costituita da Società importanti in tutti i settori che necessitano di condizioni igieniche verificate per generare prodotti e servizi di qualità.