Drying Characteristics of Soybean (Glycine Max) Using Continuous Drying and Intermittent Drying

초록

The effects of drying temperature by continuous and intermittent drying on the drying characteristics of soybean were determined in this study. Among the thin-layer drying models, the Midilli-Kucuk model showed the best fit (R-2 > 0.99) to describe the drying of soybean. At 300 min of the effective drying time, the moisture content of continuous drying at 35, 40, and 45 degrees C were 9.38 (+/- 0.00), 8.69 (+/- 0.17), and 7.70 % (+/- 0.48), respectively; while the moisture content of intermittent drying at 35, 40, and 45 degrees C were 8.28 (+/- 0.21), 7.31 (+/- 0.41), and 6.97 % (+/- 0.07), respectively. The image analysis method for detection of the crack in soybean demonstrated that at the target moisture content (7.7 %), cracked grain ratios with intermittent drying at 35, 40, and 45 degrees C were reduced by 52.08, 27.59, and 18.24 %, respectively. With the effective drying time, the activation energy for intermittent drying (9.33 kJ/mol) was significantly lower than that value for continuous drying (21.23 kJ/mol).

키워드