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首页> 外文期刊>Japanese journal of applied physics >Surface sterilization using LF-microwave hybrid plasma
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Surface sterilization using LF-microwave hybrid plasma

机译：使用LF微波杂交等离子体的表面灭菌

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摘要

Surface sterilization using LF-microwave hybrid plasma, which is a low-frequency (LF) plasma jet assisted by a microwave discharge, was investigated. Hybrid plasma is an atmospheric pressure non-thermal plasma and has a large number of reactive species. To improve the performance of surface sterilization using LF-microwave hybrid plasma, two types of discharge gas supply systems were employed. The first type (Type I) introduces argon and oxygen gas flows separately into the discharge region. The second type (Type II) introduces a mixture of two gases into the discharge region. The analysis of optical emission spectra and chemical indicators showed that more reactive oxygen species were produced by the Type II gas supply system compared to that by Type I. Moreover, a lower gas temperature was obtained with the Type II system compared to that with Type I. The results of the sterilization test show that a higher sterilization effect was obtained for the gas supply system Type II. The spore-forming bacteria (Geobacillus stearothermophilus) with a population of 2.4 x 10(6)CFU/carrier were sterilized for 50 s at the treatment temperature of 77.5 degrees C using the Type II gas supply system.
机译：研究了使用LF-微波杂化等离子体的表面灭菌，其是通过微波排放辅助的低频（LF）等离子体射流。杂化等离子体是大气压非热等离子体，具有大量的反应性物种。为了提高使用LF微波杂交等离子体的表面灭菌性能，采用了两种类型的放电气体供应系统。第一类型（I型）将氩气和氧气分开引入排出区域。第二种类型（II型）将两个气体的混合物引入排出区域中。光发射光谱和化学指示剂的分析表明，通过II型气体供应系统产生更多的反应性氧物质与I型通过I型，通过II型系统获得较低的气体温度与类型I的II型。灭菌试验的结果表明，为II型的供气系统获得了更高的灭菌效果。使用II型气体供应系统在77.5摄氏度的处理温度下灭菌，孢子形成细菌（Geobacillus stearothermophilus）在77.5℃的处理温度下灭菌。

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