Alcohol, Volatile Fatty Acid, Phenol, and Methane Emissions from Dairy Cows and Fresh Manure Sun, Huawei Trabue, Steven Koziel, Jacek Scoggin, Kenwood Jackson, Wendi Pan, Yuee Zhao, Yongjing Malkina, Irina Koziel, Jacek Mitloehner, Frank
dc.contributor.department Agricultural and Biosystems Engineering 2018-02-13T05:12:11.000 2020-06-29T22:38:29Z 2020-06-29T22:38:29Z 2013-01-28 2008-03-01
dc.description.abstract <p>There are approximately 2.5 million dairy cows in California. Emission inventories list dairy cows and their manure as the major source of regional air pollutants, but data on their actual emissions remain sparse, particularly for smog-forming volatile organic compounds (VOCs) and greenhouse gases (GHGs). We report measurements of alcohols, volatile fatty acids, phenols, and methane (CH<sub>4</sub>) emitted from nonlactating (dry) and lactating dairy cows and their manure under controlled conditions. The experiment was conducted in an environmental chamber that simulates commercial concrete-floored freestall cow housing conditions. The fluxes of methanol, ethanol, and CH<sub>4</sub> were measured from cows and/or their fresh manure. The average estimated methanol and ethanol emissions were 0.33 and 0.51 g cow<sup>−1</sup> h<sup>−1</sup> from dry cows and manure and 0.7 and 1.27 g cow<sup>−1</sup> h<sup>−1</sup> from lactating cows and manure, respectively. Both alcohols increased over time, coinciding with increasing accumulation of manure on the chamber floor. Volatile fatty acids and phenols were emitted at concentrations close to their detection limit. Average estimated CH<sub>4</sub>emissions were predominantly associated with enteric fermentation from cows rather than manure and were 12.35 and 18.23 g cow<sup>−1</sup> h<sup>−1</sup> for dry and lactating cows, respectively. Lactating cows produced considerably more gaseous VOCs and GHGs emissions than dry cows (<em>P</em> < 0.001). Dairy cows and fresh manure have the potential to emit considerable amounts of alcohols and CH<sub>4</sub> and research is needed to determine effective mitigation.</p>
dc.description.comments <p>This article is from <em>Journal of Environmental Quality </em>37, no. 2 (2008): 615–622, doi: <a href="" target="_blank">10.2134/jeq2007.0357</a>.</p>
dc.format.mimetype application/pdf
dc.identifier archive/
dc.identifier.articleid 1271
dc.identifier.contextkey 3622661
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath abe_eng_pubs/272
dc.language.iso en
dc.source.bitstream archive/|||Fri Jan 14 23:06:38 UTC 2022
dc.source.uri 10.2134/jeq2007.0357
dc.subject.disciplines Agriculture
dc.subject.disciplines Bioresource and Agricultural Engineering
dc.title Alcohol, Volatile Fatty Acid, Phenol, and Methane Emissions from Dairy Cows and Fresh Manure
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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