Osmotic Dehydration of New Zealand Chestnuts with and without Shell and Pellicle
-
Reagan J. Pontawe
,
James T. Agbebavi
Abstract
Osmotic dehydration offers an alternative to air-drying for reducing moisture content at ambient temperature. Of four different solutes investigated, 22% (mass basis) sodium chloride (NaCl) and 60% (mass basis) sucrose solutions were the most successful, with each achieving approximately a 10% reduction in wet basis moisture content after 8 h without significant detrimental side effects, although NaCl solutions cause noticeable darkening in the pits on the surface of the chestnuts. The presence of the shell and pellicle did not significantly affect the dehydration rate. Osmotic dehydration by NaCl or sucrose prior to mechanical shell removal produced a small increase in efficiency of the shell removal process.
Acknowledgements
The authors would like to acknowledge New Zealand Aid programme (NZAID) for providing a scholarship for R. J. Pontawe. They would also like to thank Godfrey Larsen for supplying the chestnuts for the experimental work.
Nomenclature
- m
Mass (kg)
- NMC
Normalized moisture content (W/Wt=0)
- W
Wet basis moisture content (kg/kg)
- Subscripts
- f
Final value
- i
Initial value
- s
Solids
- T
Total
- w
Water
References
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©2016 by De Gruyter
Articles in the same Issue
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Articles in the same Issue
- Frontmatter
- Research Articles
- Role of Particle Size in Tea Infusion Process
- Modeling the Electrohydrodynamic (EHD) Drying of Banana Slices
- Kinetics of Quality Attributes of Potato Particulates during Cooking Process
- Starch–PVA Nanocomposite Film Incorporated with Cellulose Nanocrystals and MMT: A Comparative Study
- Preservative Characteristics of Ascorbic Acid on Color, Texture and Fatty Acid of Cold-Smoked Fish
- An Efficient Biological Treatment on Dairy Wastewater by Lactobacillusplantarum: Mathematical Modeling and Process Parameters Optimization
- Effect of Blender and Blending Time on Color and Aroma Characteristics of Juice and Its Freeze-Dried Powder of Pandanus amaryllifolius Roxb. Leaves (Pandan)
- Osmotic Dehydration of New Zealand Chestnuts with and without Shell and Pellicle
- Measurement of Physical and Mechanical Properties of Russian Olive (Elaeagnus Angustifolia L.) Fruit
- Shorter Communication
- Modified Dincer and Dost Method for Predicting the Mass Transfer Coefficients in Solids
