饲用蛋白酶发酵液气流式喷雾干燥参数研究

目的]探索气流式喷雾干燥法制备饲料添加剂中性蛋白酶的最佳条件。方法]通过对雾化空气压力、进风温度和收集器温度等影响添加剂制备效果的因素进行试验分析，寻找蛋白酶液喷雾干燥工艺的最佳参数。结果]当雾化空气压力在6kgf／cm^2时，能满足气流式喷雾干燥要求。当固形物含量在5％～10％的料液以20L／h的速度流加时，结合工作效率，进风温度选择在95℃处较佳。收集器内温度为50℃时，酶基本不失活，50℃也是喷雾干燥设备的最佳控制温度。用该控制条件调试，能使25kg／h的喷雾干燥设备的效能达到18—20kg/h，蛋白酶干粉活性能达到喷雾前固形物活性的95％。结论]该研究为饲料酶添加剂的深入研究提供了依据。

Study on the Parameters of Pneumatic Spray Drying of Feeding Protease Fermentation Liquid

Objective] The aim was to explore the optimum condition of preparing feeding additive neutral protease by pneumatic spray drying method.Method] The factors influencing additive preparation such as nebulizer pressure,inlet air temperature and collector temperature were analyzed through experiments to search for the optimum parameters of protease liquid spray drying technique.Result] When the nebulizer pressure was 6 kgf/cm2,it could meet the demand of the pneumatic spray drying.When the solution containin...