大气压低温等离子体灭活表面微生物综合实验设计

Comprehensive Experimental Design for Inactivating Surface Microorganisms by Atmospheric Pressure Low-Temperature Plasma

  • 摘要: 表面微生物灭活是一个长期的社会需求,低温等离子体灭活表面微生物是表面微生物灭活研究热点。该文选用大气压低温等离子体灭活物体表面微生物进行综合实验设计。实验表明,细菌灭活效率达到99%时的作用时间非常短,低于14 s。新冠假病毒灭活所需时间较长,23 ℃和4 ℃时灭活效率达99%以上的灭活时间均为1 min;低温−20 ℃时,灭活时间为3 min。大气压低温等离子体技术适用于冷链行业食品外包装等表面微生物的灭活。该实验以社会热点和科学前沿问题为导入,不仅提升了学生开展低温等离子体和微生物学的实验操作能力,也体现了实验内容的“两性一度”,激发了学生对实验科学的热情和兴趣。

     

    Abstract: Surface microbial inactivation is a long-term social demand, and low-temperature plasma inactivation of surface microorganisms is a hot research topic in surface microbial inactivation. Aiming at the hot spot, the latest research results of a new type of low-temperature plasma disinfection and sterilization are introduced into the comprehensive experiment of environmental engineering. In our comprehensive experiment, SARS-CoV-2 (2019-nCoV) Spike pseudo virus is selected as inactivated object, and the research on the inactivation of object surface microorganisms by atmospheric pressure low-temperature plasma is carried out. The main research conclusions show the disinfection and sterilization efficiency of bacteria can reach 99% within an action time of less than 14 s. While the action time for SARS-CoV-2 (2019-nCoV) Spike pseudo virus with an inactivation efficiency of over 99% is relatively longer, which is 1 min at 23 ℃ and 4 ℃, and 3 min at −20 ℃. The results show that atmospheric pressure low temperature plasma technology is suitable for the inactivation of surface microorganisms such as food packaging in the cold chain industry. The introduced experiment can improve the students’ ability to carry out experiments on low-temperature plasma and environmental engineering microbiology, and also stimulate their enthusiasm and interest in experimental science.

     

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