Examination of heat treatments at preservation of grape must

• Main Authors: Péter Korzenszky, Erik Molnár
• Format: Article
• Language: English
• Published: HACCP Consulting 2014-02-01
• Series: Potravinarstvo
• Subjects: grape must; preservation; CO2 concentration; microwave; heat treatment
• Online Access: http://www.potravinarstvo.com/journal1/index.php/potravinarstvo/article/view/328

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In our article we present the process of grape must fermentation, as grape must is the base material of wine production. The treatment of harvested fresh grape juice has a big influence on end product quality. It is our experiments we examined the same grape must with four different methods in closed and in open spaces to determine CO₂ concentration change. There are four different methods for treatment of grape juice: boiling, microwave treatment, treatment by water bath thermostat and a control without treatment. As a result of the comparison it can be stated that the heat treatment delays the start of fermentation, thereby increasing shelf life of grape must. However, no significant differences were found between two fermentation of heat-treated grape must by the microwave and water-bath thermostat. The different heat treatment of grape must base materials was done at the laboratory in Faculty of Mechanical Engineering of Szent Istv&aacute;n University. 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