Campus Units

Agricultural and Biosystems Engineering, Civil, Construction and Environmental Engineering, Food Science and Human Nutrition, Environmental Science, Toxicology, Chemistry

Document Type



2021 ASABE Annual International Meeting

Publication Version

Published Version

Publication Date


First Page




Conference Title

2021 ASABE Annual International Meeting

Conference Date

July 12-16, 2021


UV-A photocatalysis has been investigated to comprehensively mitigate odor and selected air pollutants in the livestock environment. This study was conducted to confirm the performance of UV-A photocatalysis on the swine farm. The objectives of this research were to (1) scale-up of the UV-A photocatalysis treatment, (2) evaluate the mitigation of odorous gases from swine slurry pit, and (3) evaluate the effect of suspended particulate matter (PM). We tested UV-A photocatalysis at a mobile laboratory-scale capable of treating ~0.2 - 0.8 m3·s-1 of barn exhaust air. The targeted gaseous emissions of barn exhaust air were significantly mitigated (p < 0.05) up to 40% reduction of measured odor; 63%, 44%, 32%, 40%, 66%, and 49% reduction of dimethyl disulfide, isobutyric acid, butanoic acid, p-cresol, indole, and skatole, respectively; 40% reduction of H2S; 100% reduction of O3; and 13% reduction of N2O. The PM mitigation effect was not significant. Formaldehyde levels did not change, and a 21% generation of CO2 was observed. The smell of benzoic acid generated in UV-A treatment was likely one of the compounds responsible for the less-offensive overall odor character of the UV-treated emissions. Results are needed to inform the design of a farm-scale trial, where the interior barn walls can be treated with the photocatalyst, and foul air will be passively treated as it moves through the barn.


This conference presentation is published as Lee, Myeongseong, Jacek A. Koziel, Wyatt Murphy, William Jenks, Baitong Chen, Peiyang Li, and Chumki Banik. "Field-scale testing of mobile laboratory for mitigation of gaseous emissions from the swine farm with UV-A photocatalysis." ASABE Paper No. 2100082. ASABE Annual International Meeting, July 12-16, 2021. DOI: 10.13031/aim.202100082. Posted with permission.

Copyright Owner

American Society of Agricultural and Biological Engineers



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