欧姆加热对苹果汁中酸土脂环芽孢杆菌的杀灭作用

利用自行设计的批式欧姆加热装置,研究了欧姆加热对苹果汁中酸土脂环芽孢杆菌Alicyclobacillus acidoterrestris的杀灭作用。分析了欧姆加热的温度、电压、加热时间、pH值及加热体积等对杀菌效果的影响。结果表明欧姆加热可以有效地杀灭苹果汁中的酸土脂环芽孢杆菌。杀菌率随电压、温度和加热体积的升高而增大,随pH值的降低而增大。由于电压、pH值和加热体积的变化会改变欧姆加热系统中的电流,从而可以降低杀菌的操作条件,提高杀菌效率。图4参15

Sterilizing effect of Ohmic heating on Alicyclobacillus acidoterrestris in apple juice

Using self-made Ohmic heating installation to study its sterilizing effect on Alicyclobacillus acidoterrestris.The postvaccinal apple juice was treated by different temperatures,voltages,heating times,pH values and volumes.The results showed that Ohmic heating could destroy Alicyclobacillus acidoterrestris efficiently.The sterilizing effect was improved with the increasing of temperature,voltage and volume,but was reduced with the raising of pH value.These parameters could alter the electrical current of the liquid,and then it could enhance sterilization effect.So the sterilization condition of Ohmic heating can be simplified.