助干剂对喷雾干燥技术制备二羟基丙酮饲料添加剂的影响

Effects of spray drying aid on preparing process of dihydroxyacetone feed additive

为了提高喷雾干燥技术制备饲料添加剂过程中的集粉率和二羟基丙酮的保留率,降低产品的水分含量,研究了应用喷雾干燥技术生产二羟基丙酮饲料添加剂过程中不同干燥助剂的效果和最佳添加量。结果表明:在二羟基丙酮发酵液中加入麦芽糊精60%,β-环糊精8%,阿拉伯胶4%为宜(均以发酵液中固形物含量计)。在此条件下,二羟基丙酮饲料添加剂集粉率为87.4%,二羟基丙酮保留率为88.1%,存放10个月无霉变、色变,此时干燥所得产品中含有二羟基丙酮50.4%,助干剂总质量41.9%,水分5.3%,其他2.4%。

Dihydroxyacetone is an important intermediate product in the organism metabolic processes, it can partici- pate in the metabolism through the glycolytic pathway, and effectively regulate the relationship between glucose me- tabolism and fat metabolism. The dihydroxyacetone used in feed additives can effectively improve the biological car- cass quality and improve the function of animal body. The effects of the choice and additive mass of drying aid in the process of using spray drying technology to produce dihydroxyacetone feed additives was detected. In order to improve the powder collection rate and the dihydroxyacetone retention, and reduce the water content of the product, we added a certain amount of drying agent to the fermentation broth during the experiment. The results showed that it was suit- able to add 60% mahodextrin, 8% [3-eyelodextrin and 4% arabic gum in the feed solution of the spray drying （ the solid matter in liquid is for reference）. In this condition, the powder rate of feed additive was 87.4% , the retention rate of dihydroxyacetone was 88.1%. After storage for 10 months, there was no mildew and no discoloration and the product contained 50. 4%,dihydroxyacetone, 41.9% drying aid, 5.3% water and 2.4% other compositions.