Effect of microwave drying on rapeseeds dehydrating characteristics and quality properties
Rapeseed is one of five key oil plants in the world, and main material of edible vegetable oil. But during its harvest and storage, the serious loss was incurred because of acidification and mildew. How to dry rapeseed speedily, effectively and safely has been a key technical problem in practical production. In this research, industrial microwave stove had been chosen as energy source for rapeseed drying. Based on mechanism of rapeseed microwave drying, the effect of microwave drying on rapeseeds dehydrating characteristics and quality properties had been investigated. By a series of experiments, analysis and measurement, it had been proved that: (1) rapeseed of initial moisture content 15％～30％ could be dried up to the security storage moisture, by varying ratio of quality-power G, temperature T, heating time t and loading cycle Dc, correspondingly, meanwhile its seeded value had yet been guaranteed; field test showed that quality of its progeny had maintained the same, and its production had risen slightly. (2) microwave drying could activate the rapeseed, and enhance its germinating ability; (3) compared with other drying methods (such as hot-air and far-infrared drying), microwave drying has three stages of acceleration, constant-velocity and deceleration, the constant-velocity phase was the most longest. And drying rapeseed by microwave was innovative, economic and low energy-consumption; (4) microwave, as a radiation energy, could reduce the content of mustard-acid in 821 rapeseed from 42.7％ to 22.4％, and glucosinolate from 66.09umol/g to 18.44umol/g. Not only the quality properties of rapeseed had been improved, its comprehensive utilization value had been also enhanced.
Microwave drying Rapeseeds Quality properties Dehydrating characteristics
LIAO Qingxi SHU Caixia TIAN Boping
College of Engineering and Technology, Huazhong Agricultural University, Wuhan, 430070, China
国际会议
第十二届国际油菜大会( The 12th International Rapeseed Congress)
武汉
英文
1775-1777
2007-03-26（万方平台首次上网日期，不代表论文的发表时间）