软包装太湖白虾超高压杀菌效果及动力学研究

摘要

以熟制太湖白虾包装产品中残存菌为研究对象，探讨超高压（High hydrostatic pres-sure， HHP）用于灭菌的可行性，对影响超高压灭菌效果参数（压力、时间）进行考察与评价，并分别用 Weibull和 Log －Logistic 模型对不同处理条件下的杀菌效果进行拟合。结果表明：压力大小和保压时间是影响杀菌效果的主要因素，而压力的影响更加显著；两种模型均有较好的拟合度，且 Log －Logistic 模型拟合度更高。%Effect of high hydrostatic pressure (HHP)on the residual bacteria in cooked Taihu white shrimp packaging products was studied in order to apply HHP to the sterilization process of this product.The influence of HHP parameters (pressure,pressure holding time)on the sterilization effect was investigated and evaluated.And furthermore,Weibull model and Log-Logistic model were applied to fit the sterilization results of different treatment conditions.The results showed that pressure and time were the main factors that influence the sterilization effect,while the influence of pressure was more significantly;The two model has the better fit-ting degree;Log-Logistic model fitting degree higher.