连续式气流速热粉体杀菌技术介绍

Introduction to Continuous Gas Flow Rate Hot Powder Sterilization Technology

通过对连续式气流速热分体杀菌技术的研究,解析瞬时杀菌原理和过热蒸汽与粉体连续混合分离技术,并通过试验验证该技术的高效性。在一定压力条件下,将过热蒸汽与粉体物料混合,灭菌1~5 s后,通过2次无菌热风为粉体降温,管道分离后即可完成粉体杀菌。通过该方法进行粉体杀菌,不仅能有效降低粉体菌落总数,大肠杆菌均为阴性,真菌小于300 CFU/g,且杀菌效果与压力呈正相关关系。该方法能保留粉体的有效成分、减少杀菌对粉体颜色影响,同时对含水率和水分活度的影响也较小,从而延长粉体保质期。连续式气流速热粉体杀菌具有高效、健康、损失小、能耗小等优点,确保粉体贮藏品质,为过热蒸汽灭菌研究和粉体灭菌研究提供一定理论技术。

The principle of instantaneous sterilization and the continuous mixing separation technology of hot steam and powder are analyzed through the study of continuous gas flow rate thermal separation technology,and the high efficiency of the technology is verified through experiments.Under a certain pressure,the superheated steam is mixed with the powder material,after sterilization for 1-5 s,the powder is cooled by two sterile hot air,and the sterilization of the powder can be completed after pipe separation.By using this method to sterilize powder,the total number of bacteria in the powder can effectively be reduced,with Escherichia coli negative,fungi less than 300 CFU/g,and the bactericidal effect is positively correlated with the pressure.This method can retain the active components of the powder,reduce the effect of sterilization on the color of the powder,and have little effect on the moisture content and water activity,thus prolonging the shelf life of the powder.Continuous gas flow rate hot powder sterilization has the advantages of high efficiency,health,small loss and low energy consumption,to ensure the quality of powder storage,and to provide a certain theory and technology for the study of superheated steam sterilization and powder sterilization.