The use of ultraviolet germicidal irradiation (UVGI) in disinfection of airborne bacteria

2001 ◽  
Vol 3 (1) ◽  
pp. 101-107 ◽  
Author(s):  
Christopher F. Green ◽  
Pasquale V. Scarpino
Keyword(s):  
Airborne Bacteria ◽  
Ultraviolet Germicidal Irradiation

The use of ultraviolet germicidal irradiation (UVGI) in disinfection of airborne bacteria and rhinoviruses

1998 ◽  
Vol 29 ◽  
pp. S777-S778 ◽  
Author(s):  
P.V. Scarpino ◽  
N.J. Jensen ◽  
P.A. Jensen ◽  
R. Ward
Keyword(s):  
Airborne Bacteria ◽  
Ultraviolet Germicidal Irradiation

scholarly journals Minimizing the exposure of airborne pathogens by upper-room ultraviolet germicidal irradiation: an experimental and numerical study

2012 ◽  
Vol 9 (77) ◽  
pp. 3184-3195 ◽  
Author(s):  
Y. Yang ◽  
W. Y. Chan ◽  
C. L. Wu ◽  
R. Y. C. Kong ◽  
A. C. K. Lai
Keyword(s):  
Numerical Study ◽  
Local Variation ◽  
Airborne Bacteria ◽  
Experimental Measurements ◽  
Ultraviolet Germicidal Irradiation ◽  
Drift Flux ◽  
Inactivation Mechanism ◽  
Overall Performance ◽  
Bacteria Removal ◽  
Upper Room

There has been increasing interest in the use of upper-room ultraviolet germicidal irradiation (UVGI) because of its proven effectiveness in disinfecting airborne pathogens. An improved drift flux mathematical model is developed for optimizing the design of indoor upper-room UVGI systems by predicting the distribution and inactivation of bioaerosols in a ventilation room equipped with a UVGI system. The model takes into account several bacteria removal mechanisms such as convection, turbulent diffusion, deposition and UV inactivation. Before applying the model, the natural die-off rate and susceptibility constants of bioaerosols were measured experimentally. Two bacteria aerosols, Escherichia coli and Serratia marcescens , were tested for this purpose. It was found out that the general decay trend of the bioaerosol concentration predicted by the numerical model agrees well with the experimental measurements. The modelling results agree better with experimental observations for the case when the UVGI inactivation mechanism dominates at the upper-room region than for the case without UVGI. The numerical results also illustrate that the spatial distribution of airborne bacteria was influenced by both air-flow pattern and irradiance distribution. In addition to predicting the local variation of concentration, the model assesses the overall performance of an upper-room UVGI system. This model has great potential for optimizing the design of indoor an upper-room UVGI systems.

Disinfection efficacy of ultraviolet germicidal irradiation on airborne bacteria in ventilation ducts

Indoor Air ◽  
2018 ◽  
Vol 28 (6) ◽  
pp. 806-817 ◽  
Author(s):  
Yi Yang ◽  
Huihui Zhang ◽  
Sunday Segbenu Nunayon ◽  
Vincent Chan ◽  
Alvin CK Lai
Keyword(s):  
Airborne Bacteria ◽  
Ultraviolet Germicidal Irradiation ◽  
Ventilation Ducts

UV Air Cleaners and Upper-Room Air Ultraviolet Germicidal Irradiation for Controlling Airborne Bacteria and Fungal Spores

2006 ◽  
Vol 3 (10) ◽  
pp. 536-546 ◽  
Author(s):  
Elmira Kujundzic ◽  
Fatimah Matalkah ◽  
Cody J. Howard ◽  
Mark Hernandez ◽  
Shelly L. Miller
Keyword(s):  
Fungal Spores ◽  
Airborne Bacteria ◽  
Ultraviolet Germicidal Irradiation ◽  
Air Cleaners ◽  
Upper Room

Study of airborne bacteria and their relation to air pollutants

2014 ◽  
Author(s):  
W. Smets ◽  
S. Moretti ◽  
S. Lebeer
Keyword(s):  
Air Pollutants ◽  
Airborne Bacteria

STATISTICAL MODELING OF AIRBORNE BACTERIA AND ENDOTOXINS CONCENTRATIONS IN AUSTRALIAN PIGGERY BUILDINGS

2013 ◽  
Author(s):  
Thomas M. Banhazi ◽  
Jens Seedorf ◽  
David L. Rutley and Wayne S. Pitchford
Keyword(s):  
Statistical Modeling ◽  
Airborne Bacteria
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