Disinfection effect of plasma air disinfection machine on dynamic and static indoor air in a kindergarten
Objective To study the disinfection effect of a plasma air disinfection machine on indoor air under occupied(dynamic)and unmanned(static)conditions.Methods A plasma air disinfection machine was used in a kindergarten classroom to disinfect indoor air under occupied and unmanned conditions,and the planktonic bacteria,settling bacteria,particles and microorganisms load in indoor air before and after disinfection were compared to comprehensively assess the disinfection effect of the plasma.Results In unmanned room,the extinction rate of indoor air was more than 90%after 60 min of disinfection;in occupied room,the extinction rate of indoor air was still more than 50%despite continuous air pollution due to human activities.Regardless of whether there were people indoors or not,the settling bacteria,particles and microorganisms load in air were decreased after disinfection.Conclusion The plasma air disinfection machine can effectively eliminated bacteria and particles in air,and can be used in occupied room.It provides an effective disinfection method for preventing the indoor spread of airborne diseases.
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