响应面法优化麻山药冷冻干燥工艺研究

Optimization of Vaccum Freeze-drying Processing of Yam Using Response Surface Methodology

[目的]利用真空冷冻干燥技术对麻山药进行干燥,以确定其冻干的技术指标和工艺参数.[方法]以麻山药为试验材料,以切片厚度、加热板温度、干燥室压力为响应因子,冻干能耗为响应值,采用3因素3水平的响应面分析法优化了麻山药真空冷冻干燥工艺条件.[结果]通过分析确定了各参数最佳水平,但考虑到生产的可操作性将各参数调整为物料厚度5.0～5.5 mm,加热板温度50℃,干燥室压力40 Pa,在此操作条件下测得的冻干能耗为（19.27±0.05）kW·h.[结论]该研究可为麻山药冻干生产提供相应的技术参数.

[Objective] Vacuum freeze-drying technique was used to dry yam,so as to determine freeze-drying technical indicators and parameters.[Method] With yam as the test materials,response surface methodology（RSM） was employed to optimize the process parameters of vacuum freeze-drying.Slice thickness,heating plate temperature and drying chamber pressure were selected as the test influencing factors,the freeze-drying energy consumption as the test indicators.[Result] The optimum condition was obtained from RSM.But considering the maneuverability of production,adjusted parameter conditions for material thickness 5.0-5.5 mm,the heating plate temperature 50 ℃,the drying chamber pressure 40 Pa,the actual measured lyophilized energy consumption in this condition is （19.27 ± 0.05） kW · h.[Conclusion] The study can provide corresponding technique parameters for yam freeze-drying production.