食品科学2012，Vol.33Issue(7)：188-192,5.
真空冷冻干燥与喷雾干燥长双歧杆菌的工艺比较研究
Comparison of Vacuum Freeze-Drying and Spray-Drying Processes for Active Bifidobacterium longum Powder Production
摘要
Abstract
For long term storage and to improve its stress resistance, Bifidobacterium longum was made into active bacteria powder by vacuum freeze-drying or spray-drying. In this study, we first optimized the technological conditions for active Bifidobacterium longum powder production and then compared these two processes in term of bacterial survival rate, cost, and ease of operation. The viable count, survival rate, moisture and viable count after storage for 90 days at 4 ℃ of vacuum freezedried active Bifidobacterium longum powder were 7.98 × 10^9 CFU/g, 90.9%, 3.8%, and 2.5 ×10^8 CFU/g, respectively. The powder dissolved easily in water： In contrast, the viable count, survival rate, encapsulation efficiency, moisture and viable count after storage for 90 days at 4 ℃ of spray-dried Bifutobacterium longum powder were 4.4× 10^9 CFU/g, 82.2%, 71.9%, 5.6% and 4× 10^8 CFU/g, respectively. It took longer time to dissolve in water when compared to vacuum-freeze dried powder. Vacuum freeze-drying was more complicated to operate, time-consuming and expensive than spray-drying. In conclusion, these two processes have both their advantages and disadvantages, which make them fit for different purposes.关键词
真空冷冻干燥/喷雾干燥/长双歧杆菌/活性菌粉/工艺/比较Key words
vacuum freeze-drying/spray-drying/Bifidobacterium longum/active bacteriapowder/process/comparison分类
生物科学引用本文复制引用
付博,马齐,王卫卫,炯力..真空冷冻干燥与喷雾干燥长双歧杆菌的工艺比较研究[J].食品科学,2012,33(7):188-192,5.基金项目
陕西省科学院青年基金资助项目 （）
