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Comparison of measured and modeled ambient hydrogen sulfide concentrations near a 4000 head swine facility

Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan www.asabe.org

Citation:  Paper number  044200,  2004 ASAE Annual Meeting. (doi: 10.13031/2013.25329) @2004
Authors:   David R Schmidt, Lakshmi Koppolu, Gregory C Pratt, Larry D Jacobson, Dennis D Schulte, Steven Hoff, Mara Moscato
Keywords:   Keywords: Hydrogen Sulfide, Livestock, AFOs, Modeling, AERMOD, INPUFF-2

Air dispersion models are currently being used to regulate agriculture facilities and/or assess their environmental impact. As such, it is critical that these models accurately reflect these impacts. Meteorological conditions, hydrogen sulfide emissions, and downwind hydrogen sulfide concentrations at a four barn, 4000-head, swine finishing facility in Northeast Iowa were measured for a three week period in October 2003. Meteorological conditions and hydrogen sulfide emissions from the barns were used as inputs into two air dispersion models, INPUFF-2 and AERMOD. Model results were compared to measured results at eighteen receptor locations. Results indicate the models did not accurately predict spatial and temporal ambient concentrations. However, a rank order comparison of data (not matched in space and time) shows the models may be useful in predicting maximum concentrations over a period of time.

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