双孢菇洞道式热风干燥特性及工艺优化

Optimization and Characteristics of Tunnel Hot-air Drying for Agaricus Bisporus

为确定双孢菇的最佳洞道式热风干燥工艺,在单因素试验的基础上,采用Box-Behnken响应面试验方法,分析干燥介质温度(X1)、空气出口风压(X2)、切片厚度(X3)3个因素对感官(Y1)、单位面积耗热量(Y2)、干燥速率(Y3)、复水率(Y4)4个指标的影响及交互作用。根据试验数据得出4个评价指标的二次回归模型。优化的切片双孢菇干燥条件是:干燥介质温度68℃、空气出口风压0.67kPa、切片厚度3.5mm,在此条件下,感官达8.3,复水率38.08%,能耗低。

A Box-Behnken response surface methodology was adopted to optimize the technical conditions of tunnel hot-air drying for Agaricus bisporus based on the single factor experiment. The effects of temperature（X1）, air pressure ofexit（X2）, sliced thickness（X3） and the interaction of the three factors on sense quality （Y1）, energy consumption of unit area （Y2）, drying rate （Y3） and rehydration rate （Y4） of product were analyzed. Based on the experimental data, the quadratic regression models of four indexes were deduced, then l variables were analyzed. The optimized technical condi- tions of tunnel hot-air drying for Agaricus bisporus were obtained. In conclusion, the optimal technical conditions were obtained as follows： temperature of 68 ℃, air pressure of exit of 0.67 kPa, slice thickness of 3.5 mm. Under this condi- tion, the sense quality and the rehydration rate achieved 8.3 and 38.08%, respectively. And the energy consumption was lowest.