高压脉冲电场杀菌机理及影响因素分析

高压脉冲电场杀菌是一项新型食品杀菌技术,其杀菌过程虽温度低,但能有效杀死食品中的微生物,同时能保持食品原有的色香味,是目前非热处理食品杀菌技术中效果最佳、应用前景最好的技术。综述了高压脉冲电场灭菌的原理,高压脉冲电场处理系统的设计,并对影响灭菌效果的因素进行了分析,最后指出存在的问题并提出今后发展趋势。

A Study on Sterilization Mechanisms and Critical Factors of High Voltage Pulsed Electric Field

Food sterilization is one of the most important processes in food production.The technique of sterilization could not only have an effect on security and preservation of food,but also have a critical effect on keeping greenness,nutrition and sanitation of food.However,traditional methods of sterilization,such as thermal sterilization(pasteurization,microwave sterilization etc.) and chemical process,will influence intrinsic flavor,color and nutrition when killing microorganisms.High voltage pulsed electric field(HPEF,for short PEF)sterilization is a new type of food sterilization technique,which has best effect on food Non-thermal sterilization and has greatest foreground,due to its low temperature during sterilization process,availability in killing microorganisms in food and keeping of intrinsic color,smell and taste.In this paper,the sterilization mechanisms of PEF and design of treatment system were summarized and critical factors determining microbial inactivation by PEF were analyzed.