FOOD. Science. Technology. Quality

Food. SCIENCE. Technology. Quality

Food. Science. TECHNOLOGY. Quality

Food. Science. Technology. QUALITY

Authors

PIOTR P. LEWICKI, DOROTA WITROWA-RAJCHERT, ARTUR SAWCZUK

Title

Convective drying of apples and carrot assisted with microwaves

Abstract

Kinetics of convective, microwave and convective-microwave drying was investigated in this work. Material subjected to drying was apple and carrot cut into 1 cm cubes. Microwave energy was supplied either continuously or in pulses. It was shown that drying done solely with microwave energy was not as efficient as convective drying. Microwave energy was supplied to material at room temperature and the drying was longer than convective drying at 70°C. Convective drying assisted with microwaves was fast and the drying time was much shorter than that observed for the sole convective drying. Microwave energy supplied in pulses was more efficient than that supplied continuously. In all experiments the effect of tissue properties on the drying kinetics was very evident.

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