以枣浆为原料,测定干燥后枣粉的堆积密度、流动性、溶解性、空隙率、吸湿特性、色泽和组织结构。文中还研究了热风干燥、喷雾干燥、滚筒干燥和冷冻干燥4种不同干燥方式对枣粉物理特性的影响。结果表明:喷雾干燥枣粉的堆积密度小,空隙率高,色泽与枣原始颜色较接近,且能够产生较好的组织结构;冷冻干燥枣粉的溶解性较好,色泽较浅;热风干燥枣粉颗粒大,表面粗糙;滚筒干燥枣粉的吸湿性弱。

The effect of drying method on bulk density,liquidity,solubility,porosity,moisture absorption characteristics,color and texturewasinvestigated. Samples were dehydrated by four different drying methods: hot-air drying,spray drying,drum drying and freezing drying. All the properties except substancedensity were affected by drying method. The results showed that spray drying products had small bulk density,high porosity. The color was kept well and texture was also good. Freeze drying products had good solubility but the color of the powder was lighter. Hot air drying products had large particle size and rough surface. Drum drying products had weak hygroscopicity. After comprehensive consideration,this study provides technical support for the jujube powder production and quality control.