Campus Units

Agricultural and Biosystems Engineering, Civil, Construction and Environmental Engineering, Food Science and Human Nutrition, Environmental Science, Toxicology, Chemistry, Veterinary Diagnostic and Production Animal Medicine

Document Type

Presentation

Conference

2021 ASABE Annual International Meeting

Publication Version

Published Version

Publication Date

2021

First Page

2100153

DOI

10.13031/aim.202100153

Conference Title

2021 ASABE Annual International Meeting

Conference Date

July 12-16, 2021

Abstract

Proper treatment of infectious air could potentially mitigate the spread of airborne viruses such as porcine reproductive and respiratory syndrome virus (PRRSV). The objective of this research is to test the effectiveness of ultraviolet (UV) in inactivating aerosolized PRRSV, specifically, four UV lamps, UV-A (365 nm, both fluorescent and LED-based), "excimer" UV-C (222 nm), and germicidal UV-C (254 nm), were tested. The two UV-C lamps effectively irradiated fast-moving PRRSV aerosols with short treatment times (<2 s). One-stage and two-stage UV inactivation models estimated the UV doses needed for target percentage (%) reductions on PRRSV titer. UV-C (254 nm) dose needed for 3-log (99.9%) reduction was 0.521 and 0.0943 mJ/cm2, respectively, based on one-stage and two-stage models. An order of magnitude lower UV-C (222 nm) doses were needed for a 3-log reduction, i.e., 0.0882 and 0.048 mJ/cm2, based on one-stage and two-stage models, respectively. However, the cost of 222-nm excimer lamps is still economically prohibitive for scaling-up trials. The UV-A (365 nm) lamps could not reduce PRRSV titers for tested doses up to 4.11 mJ/cm2. Pilot-scale or farm-scale testing of UV-C on PRRSV aerosols simulating barn ventilation rates are recommended based on its effectiveness and reasonable costs comparable to HEPA filtration.

Comments

This conference presentation is published as Li, Peiyang, Jacek A. Koziel, Jeffrey J. Zimmerman, Steven J. Hoff, Jianqiang Zhang, Ting-Yu Cheng, Wannrat Yim-Im, Myeongseong Lee, Baitong Chen, and William S. Jenks. "Treatment of Airborne PRRSV Transmission with UV Light: Proof-of-concept." ASABE Paper No. 2100153. ASABE Annual International Meeting, July 12-16, 2021. DOI: 10.13031/aim.202100153. Posted with permission.

Copyright Owner

American Society of Agricultural and Biological Engineers

Language

en

File Format

application/pdf

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