Effect of chemical pretreatment on the physical properties of dehydrated grapes

Authors
Gabas, AL Menegalli, FC Telis-Romero, J
Citation
Al. Gabas et al., Effect of chemical pretreatment on the physical properties of dehydrated grapes, DRY TECHNOL, 17(6), 1999, pp. 1215-1226
Citations number
11
Categorie Soggetti
Chemical Engineering
Journal title
DRYING TECHNOLOGY
ISSN journal
07373937 → ACNP
Volume
17
Issue
6
Year of publication
1999
Pages
1215 - 1226
Database
ISI
SICI code
0737-3937(1999)17:6<1215:EOCPOT>2.0.ZU;2-8
Abstract
The effects of chemical pretreatment and air drying temperature on drying k inetics, shrinkage, density and rehydration ratio of grapes were determined at various moisture contents. It was observed that the chemical pretreatme nt employed - a solution of 2% CaCO3 with 0 to 3% ethyl oleate - increased considerably the drying rate. It was established that the shrinkage increas ed with drying temperature between 40 to 80 degrees C and decreased with in creasing concentration of ethyl oleate in the chemical pretreatment solutio n.