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Ammonia, Hydrogen Sulfide and Odor Emissions from a Beef Cattle Feedlot

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

Citation:  Paper number  034109,  2003 ASAE Annual Meeting . (doi: 10.13031/2013.15037) @2003
Authors:   Ryan Duysen, Galen Erickson, Dennis Schulte, Richard Stowell
Keywords:   Feedlots, Odor, Ammonia, Emissions

Gaseous emissions from livestock facilities represent a concern due to the potential effects of ammonia, hydrogen sulfide, and odors on environmental quality and human health. The lack of knowledge concerning beef cattle feedlot emissions has been a major obstacle in the development of emission reduction strategies and accurate emission modeling. Emissions from a 2,000-head research feedlot in eastern Nebraska were measured in this study using a wind tunnel. Flux rates of ammonia, hydrogen sulfide and odor were determined to compare the effects of diet and pen cleaning frequency for a beef cattle feedlot. Meteorological parameters and soil/manure pH, nitrogen content, surface and subsurface temperature and moisture content were also measured to determine the extent to which they influenced emission rates.

Our data clearly show that surface temperature plays an important role in ammonia emissions, but other kinetic factors are also responsible. It also shows that moisture content and temperature influence odor flux, but more research is needed to clarify this relationship. The data suggest diet and cleaning frequency may play a role in ammonia and odor flux.

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