Nitrous oxide and methane production from denitrifying woodchip bioreactors at three hydraulic residence times Davis, Morgan Martin, Emily Moorman, Thomas Isenhart, Thomas Soupir, Michelle
dc.contributor.department Natural Resource Ecology and Management
dc.contributor.department Agronomy
dc.contributor.department Agricultural and Biosystems Engineering 2021-08-26T11:22:48.000 2021-09-09T20:26:58Z 2021-09-09T20:26:58Z 2019-07-01
dc.description.abstract <p>Denitrifying <a href="" title="Learn more about bioreactors from ScienceDirect's AI-generated Topic Pages">bioreactors</a> remove nitrate (NO3−) from agricultural drainage and are slated to be an integral part of nitrogen reduction strategies in the Mississippi <a href="" title="Learn more about River Basin from ScienceDirect's AI-generated Topic Pages">River Basin</a>. However, incomplete <a href="" title="Learn more about denitrification from ScienceDirect's AI-generated Topic Pages">denitrification</a> can result in <a href="" title="Learn more about nitrous oxide from ScienceDirect's AI-generated Topic Pages">nitrous oxide</a> (N2O) production and <a href="" title="Learn more about anaerobic conditions from ScienceDirect's AI-generated Topic Pages">anaerobic conditions</a> within bioreactors may be conducive to methane (CH4) production via <a href="" title="Learn more about methanogenesis from ScienceDirect's AI-generated Topic Pages">methanogenesis</a>. Greenhouse gas production has the potential to trade excess NO3− in surface water with excess greenhouses gases in the atmosphere. Our study examined N2O and CH4 production from pilot scale (6.38 m3) bioreactors across three <a href="" title="Learn more about hydraulic residence times from ScienceDirect's AI-generated Topic Pages">hydraulic residence times</a> (HRTs), 2, 8, and 16 h. Production was measured from both the surface of the bioreactors and dissolved in the bioreactor effluent. Nitrous oxide and CH4 was produced across all HRTs, with the majority dissolved in the effluent. <a href="" title="Learn more about Nitrous oxide production from ScienceDirect's AI-generated Topic Pages">Nitrous oxide production</a> was significantly greater (<em>P</em> < 0.05) from 2 h HRTs (478.43 mg N2O m−3 day−1) than from 8 (29.95 mg N2O m−3 day−1) and 16 (36.61 mg N2O m−3 day−1) hour HRTs. Methane production was significantly less (<em>P</em> < 0.05) from 2 h HRTs (0.51 g C m3 day−1) compared to 8 (1.50 g C m3 day−1) and 16 (1.69 g C m3 day−1) hour HRTs. The 2 h HRTs had significantly greater (<em>P</em> = 0.05) impacts to climate change compared to 8 and 16 h HRTs. Results from this study suggest managing HRTs between 6 and 8 h in field bioreactors could minimize total greenhouse gas production and maximize NO3− removal.</p>
dc.description.comments <p>This article is published as Davis, Morgan P., Emily A. Martin, Thomas B. Moorman, Thomas M. Isenhart, and Michelle L. Soupir. "Nitrous oxide and methane production from denitrifying woodchip bioreactors at three hydraulic residence times." <em>Journal of environmental management</em> 242 (2019): 290-297.</p>
dc.format.mimetype application/pdf
dc.identifier archive/
dc.identifier.articleid 1404
dc.identifier.contextkey 24491458
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath nrem_pubs/399
dc.language.iso en
dc.source.bitstream archive/|||Fri Jan 14 23:56:54 UTC 2022
dc.source.uri 10.1016/j.jenvman.2019.04.055
dc.subject.disciplines Natural Resources Management and Policy
dc.subject.keywords Woodchip bioreactor
dc.subject.keywords Climate change
dc.subject.keywords Denitrification
dc.subject.keywords Nitrous oxide
dc.subject.keywords Methane
dc.subject.keywords Dissolved greenhouse gases
dc.subject.keywords Hydraulic residence time
dc.subject.keywords Bioreactor management
dc.title Nitrous oxide and methane production from denitrifying woodchip bioreactors at three hydraulic residence times
dc.type article
dc.type.genre article
dspace.entity.type Publication
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