黑木耳干燥特性

为提高干制黑木耳的品质,采用热风干燥、微波干燥、热风微波组合干燥法对黑木耳的干燥特性进行了研究。结果表明,黑木耳热风干燥过程主要为降速过程,没有恒速期,有短暂的加速期,其干燥模型曲线符合Page指数模型方程。热风干燥耗时较长,微波干燥所需时间短,但产品品质较差。热风微波组合(70℃、385W)干燥所需时间仅为70℃热风干燥所需时间的52%,所得产品品质较高,是黑木耳干制的较佳方法。

Rrsearch on drying characteristic of Auricularia auricular(L.ex Hook.) Underw

In order to improve the quality of dried Auricularia auricular(L.ex Hook.) Underw,experiments of hot-air drying,microwave drying and combined hot-air/microwave drying were carried out respectively.The results show that the drying rate of Auricularia auricular(L.ex Hook.) Underw moisture is declining mostly during the drying process.There is a slightly drying rate accelerating period and there is not constant drying rate period during the whole drying process.The drying mathematical model accords with Page fornula.The hot-air drying is time consuming.Microwave drying is more rapid,but the quality of dried Auricularia auricular(L.ex Hook.) Underw is poor.The drying time of combined hot-air/microwave(70 ℃,385 W) decreased to 52 percent of the(70 ℃)hot-air drying time,and the quality of Auricularia auricular(L.ex Hook.) Underw is better than the others.So combined hot-air/microwave(70 ℃,385 W) drying is the optimal technology.