文摘
Moisture content of soybean kernel at harvest time is too high for storage, and needs to be reduced. In this research, drying characteristics, quality and energy requirement for microwave-fluidized bed drying of soybean kernels were studied. The results showed that air temperature (80-40?°C), velocity (1.8-.5?m/s) and microwave power (200-00?W) significantly influenced drying time, moisture diffusivity, rehydration capacity, cracking, and specific energy consumption (P?≤-.05). Among the applied models, Page’s model has the best performance to estimate the microwave-fluidized bed drying behavior of the soybean kernels. Moisture diffusivity values increased (6.25?×-0?0 to 42.14?×-0-10?m2/s) as the air velocity decreased and air temperature and microwave power increased. Activation energy was foundto be between 3.33 and 17.70?kJ/mol. Minimum cracking percentage of soybean kernels (12.96?%) was obtained at 80?°C, 1.8?m/s and 200?W treatments. The increase in microwave power and decrease in air velocity level decreased the rehydration capacity. Specific energy consumption varied from 50.94 to 338.76?MJ/kg water and the lowest specific energy consumption were obtained at 80?°C, 4.5?m/s and 500?W.