VOC Removal from Manure Gaseous Emissions with UV Photolysis and UV-TiO2 Photocatalysis

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2020-06-01
Authors
Koziel, Jacek
Jenks, William
Yang, Xiuyan
Koziel, Jacek
Laor, Yael
Zhu, Wenda
van Leeuwen, J. (Hans)
Jenks, William
Hoff, Steven
Zimmerman, Jeffrey
Hoff, Steven
Zhang, Shicheng
Ravid, Uzi
Armon, Robert
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Chemistry
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Ames LaboratoryFood Science and Human NutritionCivil, Construction and Environmental EngineeringChemistryAgricultural and Biosystems EngineeringAmes Laboratory
Abstract

Control of gaseous emissions from livestock operations is needed to ensure compliance with environmental regulations and sustainability of the industry. The focus of this research was to mitigate livestock odor emissions with UV light. Effects of the UV dose, wavelength, TiO2 catalyst, air temperature, and relative humidity were tested at lab scale on a synthetic mixture of nine odorous volatile organic compounds (VOCs) and real poultry manure offgas. Results show that it was feasible to control odorous VOCs with both photolysis and photocatalysis (synthetic VOCs mixture) and with photocatalysis (manure offgas). The treatment effectiveness R (defined as % conversion), was proportional to the light intensity for synthetic VOCs mixtures and followed an order of UV185+254 + TiO2 > UV254 + TiO2 > UV185+254; no catalyst > UV254; no catalyst. VOC conversion R > 80% was achieved when light energy was >~60 J L−1. The use of deep UV (UV185+254) improved the R, particularly when photolysis was the primary treatment. Odor removal up to ~80% was also observed for a synthetic VOCs mixture, and actual poultry manure offgas. Scale-up studies are warranted.

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This article is published as Yang, Xiuyan, Jacek A. Koziel, Yael Laor, Wenda Zhu, J. Hans van Leeuwen, William S. Jenks, Steven J. Hoff, Jeffrey Zimmerman, Shicheng Zhang, Uzi Ravid, and Robert Armon. "VOC Removal from Manure Gaseous Emissions with UV Photolysis and UV-TiO2 Photocatalysis." Catalysts 10, no. 6 (2020): 607. DOI: 10.3390/catal10060607. Posted with permission.

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