DocumentCode :
2324364
Title :
Cold maceration in production of high quality wine
Author :
Zinnai, Angela ; Venturi, Francesca ; Andrich, Gianpaolo
Author_Institution :
DCBA, Univ. of Pisa, Pisa
fYear :
2006
fDate :
9-12 July 2006
Firstpage :
522
Lastpage :
525
Abstract :
The cold maceration of grapes allows one to produce wines characterised by a deep colour and an aromatic profile strongly connected to its zone of production as well as to the variety of grapes employed (typical wines). The temperature reduction could be obtained using an heat exchanger or by direct addition of a cryogen (CO2,liquid and/or CO2,solid, N2,liqiud) to the grapes crushed. Because of the very low temperature of the cryogen (T Lt 0degC), its contact with berries induces the cellular crash which promotes the later liberation of cellular components (phenols, mannoproteins, sugars, aromatic compounds) in the liquid phase. Moreover, the high cryogen content of the gaseous phase should limit remarkably the oxidation of phenolic and aromatic compounds. Some grapes parcels coming from the same vineyard were cold macerated using an heat exchanger or by addition of CO2,solid, to verify the existence of compositional differences between wine coming from different macerations. The experimental results seem to underline cellular crash is able to improve the extraction of coloured and aromatic substances so to produce wines characterised by typical flavours and organoleptic characteristics.
Keywords :
biothermics; cellular biophysics; cryogenics; food technology; heat exchangers; wine industry; aromatic compound oxidation; cold maceration; direct cryogen addition; grape cell crash; heat exchanger; high quality wine production; liquid phase cellular component liberation; phenolic compound oxidation; solid carbon dioxide; temperature reduction; Alcoholism; Composite materials; Computer crashes; Data mining; Oxidation; Pipelines; Production; Skin; Solids; Temperature; cryogen; heat exchange; maceration; phenols; wine;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Environment Identities and Mediterranean Area, 2006. ISEIMA '06. First international Symposium on
Conference_Location :
Corte-Ajaccio
Print_ISBN :
1-4244-0231-X
Electronic_ISBN :
1-4244-0232-8
Type :
conf
DOI :
10.1109/ISEIMA.2006.345010
Filename :
4150524
Link To Document :
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