微囊化蜡样芽孢杆菌的喷雾干燥工艺优化

Optimization of Spray-Drying Process Conditions for Microencapsulated Bacillus cereus

[目的]提高蜡样芽孢杆菌在压力喷雾干燥过程中的存活率,优化喷雾干燥工艺。[方法]以微囊化的蜡样芽孢杆菌为材料,考察进风温度、进料流量、料液比、喷枪孔径等对喷雾细胞存活数的影响。[结果]当进风温度为140℃,进料流量为1.5 t/h,料液比为1∶5,喷枪孔径为2.5 mm时,蜡样芽孢杆菌的存活率最高,达81%。[结论]该研究确定了蜡样芽孢杆菌的最佳喷雾干燥工艺条件。

[ Objective ] The spray-drying conditions were optimized for increasing the viability of microencapsulated Bacillus cereus by pressure spray-drying. [ Method ] A experimental design was constructed with air inlet temperature, feed flow rate, nozzle diameter and solid-liquid ratio as the independent variables and total viable counts as the dependent variables. [ Result ] The optimum spray-drying conditions for the production of maximally viable microencapstdated Bacillus cereus were air inlet temperature 140 ℃, feed flow rate 1.5 t/h, nozzle diameter 2.5mm, solid-liquid ratio 1 ： 5,which the survival rate of Bacillus cereus was 81%. [ Conclusion] The optimum spray-drying conditions for the production of maxi- mally viable microencapsulated Bacillus cereus was determined.