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Open AccessArticle

Comparison of Hydrogen Sulfide Concentrations and Odor Annoyance Frequency Predictions Downwind from Livestock Facilities

by Suraiya Akter 1,2 and Erin L. Cortus 2,3,*
Biological and Agricultural Engineering, North Carolina State University, 3100 Faucette Dr, Raleigh, NC 27695, USA
Former affiliation: Agricultural and Biosystems Engineering, South Dakota State University, 1400 N. Campus Drive, Brookings, SD 57007, USA
Bioproducts and Biosystems Engineering, University of Minnesota, 1390 Eckles Ave, St. Paul, MN 55108, USA
Author to whom correspondence should be addressed.
Atmosphere 2020, 11(3), 249;
Received: 30 December 2019 / Revised: 24 February 2020 / Accepted: 26 February 2020 / Published: 2 March 2020
(This article belongs to the Special Issue Livestock Odor and Air Quality)
Estimating and measuring the occurrence of a sensation, odor, around livestock facilities is challenging. This research compares the estimated frequency of odor nuisance with measured hydrogen sulfide (H2S) concentrations at various distances around a swine and a dairy operation, and discusses the results based on time of day, weather conditions, distance, and topography. The estimated odor annoyance-free and odor annoyance frequencies were based on a publically available calculator of odor impact derived from average odor emission rates, historical, and regional weather patterns, and dispersion modeling. Continuous monitoring of H2S was by single point monitors (SPM) at locations around the operations. Time-weighted average H2S concentrations were less than 10 ppb for odor annoyance-free frequencies, and less than 10 to at least 73 ppb for odor-annoyance frequencies. Verifying a proxy odor indicator can help update odor annoyance models and respond to site-specific concerns for existing facilities. View Full-Text
Keywords: odor; hydrogen sulfide; concentration; setback models odor; hydrogen sulfide; concentration; setback models
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Akter, S.; Cortus, E.L. Comparison of Hydrogen Sulfide Concentrations and Odor Annoyance Frequency Predictions Downwind from Livestock Facilities. Atmosphere 2020, 11, 249.

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