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Language: korean

Conflict of Interest: In relation to this article, we declare that there is no conflict of interest.

Publication history: Received February 18, 2011
Accepted June 3, 2011

This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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토치형 상압 플라즈마의 방전특성과 미생물의 국부 살균효과

Discharge Properties of Torch-Type Atmospheric Pressure Plasma and Its Local Disinfection of Microorganism

손향호 이원규^†

Hyang Ho Son Won Gyu Lee^†

강원대학교 화학공학과, 200-701 강원도 춘천시 강원대학길 1

Department of Chemical Engineering, Kangwon National University, 192-1 Hyoja-dong, Chuncheon-si, Gangwon 200-701, Korea

wglee@kangwon.ac.kr

Korean Chemical Engineering Research, December 2011, 49(6), 835-839(5), NONE Epub 28 November 2011

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Abstract

토치형 상압 플라즈마 반응기를 통한 방전 및 플라즈마 flame에 대한 분석과 발생된 플라즈마 현상을 이용하여 E.coli에 대한 살균효과를 측정하였다. 상압 플라즈마 반응기를 통해 나오는 플라즈마 flame의 길이는 입력전압, 반응기체의 유량 그리고 아르곤/산소 혼합기체에서의 산소비율에 영향을 크게 받았다. 플라즈마 flame에 의한 가열효과는 10분 조사 후에도 43℃ 미만으로 저온처리가 가능했다. E. coli에 대한 살균처리에서 입력전압의 증가, 아르곤/산소 혼합기체에서의 산소비율 증가 그리고 플라즈마 flame에 대한 노출시간의 증가에 따라 전체적인 살균효과를 향상되었다. 플라즈마 처리 시에 오존농도가 높은 공정조건에서 플라즈마 flame의 직접적인 접촉시간을 증가시키면 살균효과를 극대화할 수 있다.

The characteristics of torch-type atmospheric pressure plasma and its sterilization effects have been analyzed. The length of plasma flame was varied with the level of applied voltage and the mixture gases composed of argon and oxygen. The effect of plasma flame on the temperature increase of surface treated was limited to 43 ℃ as a maximum temperature under exposing time of 10 min. The sterilization for E. coli was strongly affected by the applied voltage, the oxygen ratio in the mixture gas and the treatment time. At a high concentration of ozone, the increase of_x000D_ treatment time under the direct contact with plasma flame yields to maximize the effect of the sterilization on E. coli.

Keywords

Torch-type Atmospheric Pressure Plasma Sterilization Ozone Dielectric Barrier Discharge E. coli

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