Odor Characterization at Open-Lot Beef Cattle Feedyards Using Triangular Forced-Choice Olfactometry

dc.contributor.author Parker, David
dc.contributor.author Rhoads, Marty
dc.contributor.author Koziel, Jacek
dc.contributor.author Schuster, Greta
dc.contributor.author Perschbacher-Buser, Zena
dc.contributor.author Koziel, Jacek
dc.contributor.department Agricultural and Biosystems Engineering
dc.date 2018-02-13T03:47:26.000
dc.date.accessioned 2020-06-29T22:41:39Z
dc.date.available 2020-06-29T22:41:39Z
dc.date.copyright Sat Jan 01 00:00:00 UTC 2005
dc.date.embargo 2012-12-08
dc.date.issued 2005-01-01
dc.description.abstract <p>Odor is a growing concern at concentrated animal feeding operations as residential houses encroach upon rural areas once occupied only by agriculture. A research project was conducted to determine baseline ambient odor characteristics at large open-lot beef cattle feedyards and to develop a better understanding of when and why odors occur at feedyards. Ambient odor samples were collected two to four times per month over a 12-month period in 2002-2003 at three large commercial open-lot beef cattle feedyards in the Texas panhandle. Ambient odor samples were collected upwind of the feedyard, downwind of the pens, and downwind of the runoff storage pond. Odor samples were also collected on five separate days covering four months in 2004 from a surface isolation flux chamber to estimate odor emission rates from the feedyard surface. All odor samples were collected in 10 L Tedlar bags and analyzed with trained human odor panelists for odor concentration (detection threshold, DT) by dynamic dilution forced-choice olfactometry, intensity by reference scaling, and hedonic tone. Manure moisture content and weather data were collected on-site at each of the feedyards. At two of the feedyards, mean DTs downwind of the pens and storage pond were statistically similar to upwind DTs, ranging from 33 to 45 OU m-3. At the third feedyard, mean DTs downwind of the pens (69 OU m-3) and pond (124 OU m-3) were statistically higher than the mean upwind DT (36 OU m-3) (p < 0.05). Odor emission rates ranged from 0.3 to 3.2 OU m-2 s-1 during a period when downwind DTs ranged from 17 to 132 OU m-3. A number of elevated DTs were explained by elevated manure moisture contents from recent precipitation. These results demonstrate that odor production from open-lot beef cattle feedyards is a complex phenomenon that depends at least partially on weather conditions. Thus, odor prediction and control will likely be difficult at these facilities.</p>
dc.description.comments <p>This article is from <em><a href="http://elibrary.asabe.org/abstract.asp?aid=19184&t=3&dabs=Y&redir=&redirType=" target="_blank">Transaction of the ASAE</a></em> 48, no. 4 (2005): 1527–1535.</p>
dc.format.mimetype application/pdf
dc.identifier archive/lib.dr.iastate.edu/abe_eng_pubs/66/
dc.identifier.articleid 1071
dc.identifier.contextkey 3522657
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath abe_eng_pubs/66
dc.identifier.uri https://dr.lib.iastate.edu/handle/20.500.12876/1449
dc.language.iso en
dc.source.bitstream archive/lib.dr.iastate.edu/abe_eng_pubs/66/Koziel_2005_OdorCharacterizationOpenLot.pdf|||Sat Jan 15 01:24:58 UTC 2022
dc.subject.disciplines Agriculture
dc.subject.disciplines Bioresource and Agricultural Engineering
dc.subject.keywords Cattle
dc.subject.keywords Detection threshold
dc.subject.keywords Feedyard
dc.subject.keywords Hedonic tone
dc.subject.keywords Intensity
dc.subject.keywords Manure
dc.subject.keywords Odor
dc.title Odor Characterization at Open-Lot Beef Cattle Feedyards Using Triangular Forced-Choice Olfactometry
dc.type article
dc.type.genre article
dspace.entity.type Publication
relation.isAuthorOfPublication 76fc5589-51f8-4f3c-885c-e25d8037d641
relation.isOrgUnitOfPublication 8eb24241-0d92-4baf-ae75-08f716d30801
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