Observation on the disinfection effect of a plasma disinfection module on object surface
Objective To observe the disinfection efficacy of a plasma disinfection module on object surfaces,and to provide scientific basis for practical disinfection application.Methods The disinfection efficacy of a certain plasma disinfection module on object surfaces was experimentally observed with simulated field disinfection test method.Results When the plasma generator module was irradiated for 10 min from the vertical height of 1.5 cm above the surface,the mean killing logarithm values of Candida albicans and Bacillus subtilis var.niger spores on the surface were 2.28 and 1.90,respectively.After irradiation and disinfection for 2 min,the logarithm killing values of Escherichia coli,Staphylococcus aureus and Pseudomonas aeruginosa on the surfaces of objects were all＞3.00.Conclusion The plasma generator module has a good killing effect on vegetative forms of bacteria,and poor killing effect on fungi and bacterial spores when irradiated at colse range.
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