Environmental assessment of three egg production systems—Part I: Monitoring system and indoor air quality

dc.contributor.author Zhao, Yang
dc.contributor.author Xin, Hongwei
dc.contributor.author Shepherd, Timothy
dc.contributor.author Li, Hong
dc.contributor.author Xin, Hongwei
dc.contributor.department Agricultural and Biosystems Engineering
dc.date 2018-02-16T02:49:55.000
dc.date.accessioned 2020-06-29T22:41:22Z
dc.date.available 2020-06-29T22:41:22Z
dc.date.copyright Thu Jan 01 00:00:00 UTC 2015
dc.date.issued 2015-03-01
dc.description.abstract <p>To comprehensively assess conventional vs. some alternative laying-hen housing systems under U.S. production conditions, a multi-institute and multi-disciplinary project, known as the Coalition for Sustainable Egg Supply (CSES) study, was carried out at a commercial egg production farm in the Midwestern United States over two single-cycle production flocks. The housing systems studied include a conventional cage house (200,000 hen capacity), an aviary house (50,000 hen capacity), and an enriched colony house (50,000 hen capacity). As an integral part of the CSES project, continual environmental monitoring over a 27-month period described in this paper quantifies indoor gaseous and particulate matter concentrations, thermal environment, and building ventilation rate of each house. Results showed that similar indoor thermal environments in all three houses were maintained through ventilation management and environmental control. Gaseous and particulate matter concentrations of the enriched colony house were comparable with those of the conventional cage house. In comparison, the aviary house had poorer indoor air quality, especially in wintertime, resulting from the presence of floor litter (higher ammonia levels) and hens’ activities (higher particulate matter levels) in it. Specifically, daily mean indoor ammonia concentrations had the 95% confidence interval values of 3.8 to 4.2 (overall mean of 4.0) ppm for the conventional cage house; 6.2 to 7.2 (overall mean of 6.7) ppm for the aviary house; and 2.7 to 3.0 (overall mean of 2.8) ppm for the enriched colony house. The 95% confidence interval (overall mean) values of daily mean indoor carbon dioxide concentrations were 1997 to 2170 (2083) ppm for the conventional cage house, 2367 to 2582 (2475) ppm for the aviary house, and 2124 to 2309 (2216) ppm for the enriched colony house. Daily mean indoor methane concentrations were similar for all three houses, with 95% confidence interval values of 11.1 to 11.9 (overall mean of 11.5) ppm. The 95% confidence interval values (overall mean) of daily mean PM<sub>10</sub> and PM<sub>2.5</sub> concentrations, in mg/m<sup>3</sup>, were, respectively, 0.57 to 0.61 (0.59) and 0.033 to 0.037 (0.035) for the conventional cage house, 3.61 to 4.29 (3.95) and 0.374 to 0.446 (0.410) for the aviary house, and 0.42 to 0.46 (0.44) and 0.054 to 0.059 (0.056) for the enriched colony house. Investigation of mitigation practices to improve indoor air quality of the litter-floor aviary housing system is warranted.</p>
dc.description.comments <p>This article is from <em>Poultry Science</em> 94 (2015): 518–533, doi:<a href="http://dx.doi.org/10.3382/ps/peu076" target="_blank">10.3382/ps/peu076</a>. Posted with permission.</p>
dc.format.mimetype application/pdf
dc.identifier archive/lib.dr.iastate.edu/abe_eng_pubs/625/
dc.identifier.articleid 1905
dc.identifier.contextkey 6944958
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath abe_eng_pubs/625
dc.identifier.uri https://dr.lib.iastate.edu/handle/20.500.12876/1412
dc.language.iso en
dc.source.bitstream archive/lib.dr.iastate.edu/abe_eng_pubs/625/2015_Zhao_EnvironmentalAssessment.pdf|||Sat Jan 15 01:19:05 UTC 2022
dc.source.uri 10.3382/ps/peu076
dc.subject.disciplines Agriculture
dc.subject.disciplines Bioresource and Agricultural Engineering
dc.subject.disciplines Poultry or Avian Science
dc.subject.keywords Indoor air quality
dc.subject.keywords Ammonia
dc.subject.keywords Greenhouse gas
dc.subject.keywords Particulate matter
dc.subject.keywords Alternative hen housing
dc.title Environmental assessment of three egg production systems—Part I: Monitoring system and indoor air quality
dc.type article
dc.type.genre article
dspace.entity.type Publication
relation.isAuthorOfPublication 36e0a8ce-fa2e-4df4-9f67-8d1717122650
relation.isOrgUnitOfPublication 8eb24241-0d92-4baf-ae75-08f716d30801
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