fulltext.study @t Gmail

Effect of citric acid and blanching pre-treatments on drying and rehydration of Amasya red apples

Paper ID Volume ID Publish Year Pages File Format Full-Text
19525 43073 2010 9 PDF Available
Title
Effect of citric acid and blanching pre-treatments on drying and rehydration of Amasya red apples
Abstract

Drying behaviour of red apples was experimentally examined in a laboratory dryer at drying temperatures of 55, 65 and 75 °C and a constant air velocity of 2.0 m/s. Two pre-treatments (blanching and 0.5% citric acid) were applied to prior to drying process. It was observed that both the drying temperature and pre-treatment affected the drying time. The shortest drying times were obtained from pre-treated samples with citric acid solution. Blanched samples have higher rehydration ratios than other samples. Five mathematical models namely, Newton, Henderson and Pabis, Page, Logarithmic and Parabolic models were evaluated in the kinetics research. The fit quality of the proposed models was evaluated by using the determination of coefficient (R2), reduced chi-square (χ2), root means square error (RMSE) and mean relative percent error (P). The Parabolic model provided the best representation of data. Effective moisture diffusivity (Deff) computed on the basis of Fick's second law. Deff value of pre-treated samples with citric acid solution was higher than the other samples.

Keywords
Red apple; Hot air drying; Rehydration ratio; Effective moisture diffusivity; Activation energy
First Page Preview
Effect of citric acid and blanching pre-treatments on drying and rehydration of Amasya red apples
Publisher
Database: Elsevier - ScienceDirect
Journal: Food and Bioproducts Processing - Volume 88, Issues 2–3, June–September 2010, Pages 124–132
Authors
,
Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering