Optimization of Cold Plasma Sterilization Process and Quality Analysis of Fresh Sweet Chestnut
In order to optimize the cold plasma sterilization process of fresh sweet chestnut,this study used sterilization rate as an index,and used single factor experiments to investigate the effects of treatment voltage,treatment time,and treatment frequency on the sterilization rate of fresh sweet chestnut.On this basis,the Box-Behnken response surface method was used to optimize the cold sterilization process.And the effects of cold plasma treatment on the color,sensory quality,texture and microstructure of fresh sweet chestnut were analyzed.The results showed that the sterilization rate of cold plasma on fresh sweet chestnut was significant increased and then tended to be stable with the increase of treatment voltage,time,and frequency.The best process parameters of cold plasma sterilization of fresh chestnut were:treatment voltage 125 kV,treatment time 234 s,and treatment frequency 103 Hz.Under this condition,the sterilization rate of cold plasma for fresh sweet chestnut reached 98.55％,which was close to the predicted value(98.96％),indicating that cold plasma had significant sterilization effect on fresh chestnut.In addition,compared with the control group,there were no obvious changes in color,sensory quality and texture of fresh sweet chestnut treated with cold plasma,indicating that cold plasma had no adverse effect on the quality of fresh sweet chestnut.Therefore,this study provides some theoretical basis for the application of cold plasma sterilization technology on fresh sweet chestnut.
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