Hygienic characteristic of the UV led irraditor for the disinfecting surfaces and indoor air

Abstract

Objective: to assess from the hygienic point of view the bactericidal characteristics and effectiveness of disinfection of surfaces and indoor air with the developed bactericidal ultraviolet LED irradiator (BUI-L). Material and methods. The studies were carried out in scientific laboratories in conditions close to natural, by usage of standard modern hygienic, physical and microbiological methods. Results. The BUI-L is characterized by hygienic and environmental safety at usage, lower power consumption, ultraviolet radiation power, total biocidal flux, surface and volume density of biocidal flux and biocidal energy by 2.5-5.6 times, operating energy illumination and energy exposure in spectrum С is less in 4.4-5.5 times, in spectrum В — more in 5.8-9.3 times in comparison with the standard bactericidal ultraviolet mercury irradiator. BUI-L during disinfection of the surface contaminated with the Escherichia coli test culture inhibits its growth on 98.2%, Staphylococcus aureus — on 96.4%, air contaminated with S. aureus — 98.8% respectively, in comparison with the control. Conclusion. The irradiator meets the regulatory hygienic requirements and can be recommended for disinfecting air and surfaces during sanitary and anti-epidemic measures to prevent infectious diseases, including health care associated infections in healthcare organizations.