THE EFFECT OF DRYING ON QUALITY PROPERTIES OF ONION BY USING MICROWAVE OVEN AND SOLAR DRYER

The experiments were carried out at Agriculture and Biosystems Engineering Department, Faculty of Menoufia University the center laboratory Agricultural Research Institute, center, Dokki, Giza, Egypt to study effect drying on quality properties onion using microwave solar dryer 2018. experimental treatments included three different levels power (320, 480, 640 Watt), slices thickness (2, 4, 6 mm). Direct includes onionthickness 4 best treatment found for was identified 320W (2mm), where, (H°) value 16°, considered method because it given lowest total color change.