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Dissolved oxygen content in apple must: technological implications in cider processing
Author(s) -
Alberti Aline,
Braga Cíntia Maia,
Jaster Henrique,
Nogueira Alessandro
Publication year - 2014
Publication title -
journal of the institute of brewing
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.523
H-Index - 51
eISSN - 2050-0416
pISSN - 0046-9750
DOI - 10.1002/jib.113
Subject(s) - browning , chemistry , oxygen , dissolution , brewing , food science , maceration (sewage) , pressing , fermentation , pulp and paper industry , biochemistry , environmental science , environmental engineering , organic chemistry , engineering
Oxygen can influence the composition and quality of apple must and cider. In this study, the effect of unit operations on oxygen dissolution during apple must processing was investigated and the technological implications discussed. Oxygen dissolution after different apple must processing unit operations, and also the effect of enzymatic browning reaction on dissolved oxygen uptake were analysed. During pressing, the highest and first oxygen dissolution occurred in the must at 6.8 mg/L, on average. The enzymatic browning reaction after 10 min was responsible for an oxygen uptake above 80%. The addition of sulphur dioxide or maceration of crushed apple results in a must with more oxygen content, however the beverage colour is negatively affected. The incorporation of oxygen into the must by bubbling oxygen or the movement of liquid may not be effective owing to consumption by the reaction of residual polyphenol oxidase. Moreover, this can affect the alcoholic fermentation because of the oxidation of nutrients such as vitamins. If the apple must is depectinized, racked and filtered, there will be enough oxygen to obtain a quality cider. These results and observations can be useful for selecting unit operations in cider companies in order to improve the beverage quality. Copyright © 2014 The Institute of Brewing & Distilling