香葱粉喷雾干燥工艺优化

Optimization of Spray Drying Technology of Shallot Powder

以新鲜香葱为原料,采用喷雾干燥法制备香葱粉,在单因素试验的基础上,采用响应面法筛选出喷雾干燥得率最佳的参数。结果表明,喷雾干燥制备香葱粉的最佳工艺条件为:料液浓度30%,进口温度140℃,热空气流量0.32 m^3/min,此条件下喷雾干燥香葱粉得率为30.9%,得到的香葱粉淡绿色,分散性好,并保留了香葱特有的气味。

Taking fresh shallot as main raw material,shallot powders were prepared by spray drying method.On the basis of single factor experiment,the best spray drying parameters for the highest shallot powder yield were selected by the response surface methodology.The results showed that the optimal spray drying conditions were as fellows:feed concentration 30%,inlet temperature 140℃,and the hot air flow rate 0.32 m^3/min.Under the above conditions,the maximum yield of shallot powder was 30.9%.The prepared shallot powder had light green color,good dispersibility and typical smell of shallot.