Inżynieria Rolnicza
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Title : Drying kohlrabi with microwave method in the lowered pressure conditions
Key words : kahlrabi, microwave-vacuum drying, kinetics, shrinkage
Summary :

Kohlrabi, a vegetable which contains precious microelements and vitamins(B1, B2, B6, C) and acids: nicotinic acid, panthotenic acid, folic acid were subjected to microwave-vacuum drying. The objective of the paper was to determine the kinetics of drying of kahlrabi, drying shrinkage, rehydration kinetics as well as the maximum temperature of heating the material. Material was subjected to microwave-vacuum drying process at the pressure of 2-4 kPa and power of microwaves at the level of 240, 360 and 480 W. Kahlrabi was cut into 10 mm cubes. The research which was carried out allowed the statement that in the kinetics of drying for all three powers of microwaves, two periods of drying may be distinguished. The period of constant speed of drying described with a linear equation, which ended upon reaching uk=4 kg∙kg-1 and the period of variable speed of drying described with exponential equation. Final volumetric drying shrinkage was at the level of 70%.

Please use the following format to cite the selected article : Jałoszyński, K., Pasławska, M., Surma, M., Stępień, B. (2013). Drying kohlrabi with microwave method in the lowered pressure conditions. Inzynieria Rolnicza, 4(147), 91-99.
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