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Int. J. Environ. Res. Public Health 2017, 14(1), 51; doi:10.3390/ijerph14010051

A Case Study of Upper-Room UVGI in Densely-Occupied Elementary Classrooms by Real-Time Fluorescent Bioaerosol Measurements

1
Durham School of Architecture Engineering and Construction, University of Nebraska-Lincoln, 1110 S 67th Street, Omaha, NE 68182, USA
2
Department of Biostatistics, College of Public Health, University of Nebraska Medical Center, 984375 Nebraska Medical Center, Omaha, NE 68198, USA
*
Author to whom correspondence should be addressed.
Academic Editors: Daniela Haluza, Stana Simic and Hanns Moshammer
Received: 4 October 2016 / Revised: 19 December 2016 / Accepted: 30 December 2016 / Published: 8 January 2017
(This article belongs to the Special Issue UV-Radiation: From Physics to Impacts)
View Full-Text   |   Download PDF [1723 KB, uploaded 9 January 2017]   |  

Abstract

Recently, the requirement to continuously collect bioaerosol samples using shorter response times has called for the use of real-time detection. The decreased cost of this technology makes it available for a wider application than military use, and makes it accessible to pharmaceutical and academic research. In this case study, real-time bioaerosol monitors (RBMs) were applied in elementary school classrooms—a densely occupied environment—along with upper-room ultraviolet germicidal irradiation (UVGI) devices. The classrooms were separated into a UVGI group and a non-UVGI control group. Fluorescent bioaerosol counts (FBCs) were monitored on 20 visiting days over a four-month period. The classroom with upper-room UVGI showed significantly lower concentrations of fine size (<3 μm) and total FBCs than the control classroom during 13 of the 20 visiting days. The results of the study indicate that the upper-room UVGI could be effective in reducing FBCs in the school environment, and RBMs may be applicable in reflecting the transient conditions of the classrooms due to the dynamic activity levels of the students and teachers. View Full-Text
Keywords: ultraviolet germicidal irradiation; school; indoor air quality; real-time detection; fluorescent bioaerosol ultraviolet germicidal irradiation; school; indoor air quality; real-time detection; fluorescent bioaerosol
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Su, C.; Lau, J.; Yu, F. A Case Study of Upper-Room UVGI in Densely-Occupied Elementary Classrooms by Real-Time Fluorescent Bioaerosol Measurements. Int. J. Environ. Res. Public Health 2017, 14, 51.

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