Experimental study of disinfection effect of a new low-temperature plasma disinfector

Caiqin MA; Guimin XU; Xiangni Wang; Yixin Cui; Na Liu; Xingmin Shi; Guanjun Zhang

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Experimental study of disinfection effect of a new low-temperature plasma disinfector

VernacularTitle:新型低温等离子体消毒机空气消毒效果的试验研究
Author: Caiqin MA ¹ ; Guimin XU ^{2
,

3} ; Xiangni WANG ¹ ; Yixin CUI ¹ ; Na LIU ¹ ; Xingmin SHI ¹ ; Guanjun ZHANG ⁴
Author Information

1. School of Medicine, Xi’an Jiaotong University, Xi’an 710061
2. School of Electronic and Control Engineering, Chang’an University, Xi’an 710061
3. School of Electrical Engineering, Xi’an Jiaotong University, Xi’an 710049, China
4. School of Electrical Engineering, Xi’an Jiaotong University, Xi’an 710049, China
Publication Type:Journal Article
Keywords: low-temperature plasma air disinfector; disinfection effect; natural bacteria; artificial dye bacterium
From: Journal of Xi'an Jiaotong University(Medical Sciences) 2021;42(5):774-779
CountryChina
Language:Chinese
Abstract: 【Objective】 To observe the inactivation effect of a new low-temperature plasma air disinfector on microorganisms in the natural environment and artificial contaminated environment so as to further determine the minimum effective processing parameters. 【Methods】 First， in 0.5 m³ of super clean workbench and 1.05 m³ airtight organic glass cavity in the body， the new low-temperature plasma air disinfector developed was used to inactivate the natural bacteria in the air under different parameters. Then in 1.05 m³ airtight organic glass cavity in the body， the new low-temperature plasma air disinfector was used to treat the Staphylococcus aureus and Escherichia coli under the condition of artificial bacteria spraying. Last， the plate counting method was used to evaluate the inactivation effect of the disinfector on natural bacteria and artificial bacteria in the air. 【Results】 For the low-temperature plasma air disinfector in 0.5 m³ and 1.05 m³ confined space， the lowest effective treatment parameters for inactivated natural bacteria were 13 kV， 5 min or 12 kV， 10 min. For the low-temperature plasma air disinfection machine in 13 kV discharge voltage treatment of different time， compared with before treatment， the killing rate of Escherichia coli and Staphylococcus aureus increased significantly after treatment for 20 min （P<0.000 1）. Both could meet the requirements of disinfection specifications ［100%，（99.98±0.01）%≥99.90%］. 【Conclusion】 The inactivation of natural bacteria and artificial bacteria by the new low-temperature plasma air disinfector has reached the qualified standard of disinfection stipulated in Technical Specifications for Disinfection.