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Front Chem

Title:		"Pilot-Scale Testing of UV-A Light Treatment for Mitigation of NH(3), H(2)S, GHGs, VOCs, Odor, and O(3) Inside the Poultry Barn"
Author(s):		Lee M; Li P; Koziel JA; Ahn H; Wi J; Chen B; Meiirkhanuly Z; Banik C; Jenks WS;
Address:		"Department of Animal Biosystems Sciences, Chungnam National University, Daejeon, South Korea. Department of Agricultural and Biosystems Engineering, Iowa State University, Ames, IA, United States. Department of Chemistry, Iowa State University, Ames, IA, United States"
Journal Title:		Front Chem
Year:		2020
Volume:		20200731
Issue:
Page Number:		613 -
DOI:		10.3389/fchem.2020.00613
ISSN/ISBN:		2296-2646 (Print) 2296-2646 (Electronic) 2296-2646 (Linking)
Abstract:		"Poultry farmers are producing eggs, meat, and feathers with increased efficiency and lower carbon footprint. Technologies to address concerns about the indoor air quality inside barns and the gaseous emissions from farms to the atmosphere continue to be among industry priorities. We have been developing and scaling up a UV air treatment that has the potential to reduce odor and other gases on the farm scale. In our recent laboratory-scale study, the use of UV-A (a less toxic ultraviolet light, a.k.a. 'black light') and a special TiO(2)-based photocatalyst reduced concentrations of several important air pollutants (NH(3), CO(2), N(2)O, O(3)) without impact on H(2)S and CH(4). Therefore, the objectives of this research were to (1) scale up the UV treatment to pilot scale, (2) evaluate the mitigation of odor and odorous volatile organic compounds (VOCs), and (3) complete preliminary economic analyses. A pilot-scale experiment was conducted under commercial poultry barn conditions to evaluate photocatalyst coatings on surfaces subjected to UV light under field conditions. In this study, the reactor was constructed to support interchangeable wall panels and installed on a poultry farm. The effects of a photocatalyst's presence (photocatalysis and photolysis), UV intensity (LED and fluorescent), and treatment time were studied in the pilot-scale experiments inside a poultry barn. The results of the pilot-scale experiments were consistent with the laboratory-scale one: the percent reduction under photocatalysis was generally higher than photolysis. In addition, the percent reduction of target gases at a high light intensity and long treatment time was higher. The percent reduction of NH(3) was 5-9%. There was no impact on H(2)S, CH(4), and CO(2) under any experimental conditions. N(2)O and O(3) concentrations were reduced at 6-12% and 87-100% by both photolysis and photocatalysis. In addition, concentrations of several VOCs responsible for livestock odor were reduced from 26 to 62% and increased with treatment time and light intensity. The odor was reduced by 18%. Photolysis treatment reduced concentrations of N(2)O, VOCs, and O(3), only. The initial economic analysis has shown that LEDs are more efficient than fluorescent lights. Further scale-up and research at farm scale are warranted"
Keywords:		air pollution ammonia concentrated animal feeding operations emissions indoor air quality odor photocatalysis poultry production;
Notes:		"PubMed-not-MEDLINELee, Myeongseong Li, Peiyang Koziel, Jacek A Ahn, Heekwon Wi, Jisoo Chen, Baitong Meiirkhanuly, Zhanibek Banik, Chumki Jenks, William S eng Switzerland 2020/09/10 Front Chem. 2020 Jul 31; 8:613. doi: 10.3389/fchem.2020.00613. eCollection 2020"