玉米重组米微波-热风联合干燥工艺优化

Optimization of corn reformed rice dried by microwave–air drying combination

利用微波-热风联合干燥方式干燥玉米重组米,选取物料厚度、微波时间、微波功率、热风风速、热风温度和热风时间6个因素,采用二次通用旋转组合设计法优化干燥过程。结果表明:物料厚度6 mm、微波时间6 min、微波功率1800 W、热风风速1 m/s和热风温度40℃和热风时间15 min为最佳工艺条件。在此条件下,干燥速率为0.57 kg/kg·min、爆腰率为5%和感官评定为87。微波-热风联合干燥适用于玉米重组米干燥,是较快速、产品品质较好的干燥方式。

Corn reformed rices were dried by method of microwave-air-drying combination. We select six variables as experimental factors for optimizing the drying process in quadratic general rotary unitized, material thickness, microwave time, microwave power, air wind speed, air temperature and air time respectively. optimum combination level was material thickness 6 mm, microwave time 6 min, microwave power 1800 W, air wind speed 1 m/s, air temperature 40 ℃ and air time 15 min. In this parameters, the drying rate of 0.57 kg/kg·min, breakdown rate of rice is 5% and sensory evaluation is 87. Microwave-airdrying combination is a rapid drying method, which can get better product quality of corn reformed rice.