Enhanced Denitrification Bioreactors Hold Promise for Mid-Atlantic Ditch Drainage

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dc.contributor.authorChristianson, L. E.en
dc.contributor.authorCollick, A. S.en
dc.contributor.authorBryant, Ray B.en
dc.contributor.authorRosen, T.en
dc.contributor.authorBock, Emilyen
dc.contributor.authorAllen, A. L.en
dc.contributor.authorKleinman, P. J. A.en
dc.contributor.authorMay, E. B.en
dc.contributor.authorBuda, A. R.en
dc.contributor.authorRobinson, J.en
dc.contributor.authorFolmar, G. J.en
dc.contributor.authorEaston, Zachary M.en
dc.contributor.departmentBiological Systems Engineeringen
dc.date.accessioned2020-03-17T17:26:46Zen
dc.date.available2020-03-17T17:26:46Zen
dc.date.issued2017-12en
dc.description.abstractThere is strong interest in adapting denitrifying bioreactors to mid-Atlantic drainage systems to help address Chesapeake Bay water quality goals. Three ditch drainage-oriented bioreactors were constructed in 2015 in Maryland to evaluate site-specific design and installation concerns and nitrate (NO3-N) removal. All three bioreactor types removed NO3-N, as measured by load and/or concentration reduction, showing promise for denitrifying bioreactors in the mid-Atlantic's low gradient Coastal Plain landscape. The ditch diversion bioreactor (25% NO3-N load reduction; 0.97 g NO3-N removed m(-3) d(-1)) and the sawdust denitrification wall adjacent to a ditch (> 90% NO3-N concentration reduction; 1.9-2.9 g NO3-N removed m(-3) d(-1)) had removal rates within range of the literature. The in-ditch bioreactor averaged 65% NO3-N concentration reduction, but sedimentation is expected to be one of the biggest challenges. A robust water balance is critical for future assessment of bioreactors' contribution to water quality improvement in low gradient mid-Atlantic landscapes.en
dc.description.adminPublic domain – authored by a U.S. government employeeen
dc.description.notesFunding was from USDA-NRCS Conservation Innovation Grant # 69-3A75-13-232. Thanks to Mr. Don Mahan (UMES) for sample collection and producers who allowed use of their land as test sites.en
dc.description.sponsorshipUSDA-NRCS Conservation Innovation Grant [69-3A75-13-232]en
dc.format.mimetypeapplication/pdfen
dc.identifier.doihttps://doi.org/10.2134/ael2017.09.0032en
dc.identifier.issn2471-9625en
dc.identifier.issue1en
dc.identifier.otherUNSP 170032en
dc.identifier.urihttp://hdl.handle.net/10919/97334en
dc.identifier.volume2en
dc.language.isoenen
dc.rightsCC0 1.0 Universalen
dc.rights.urihttp://creativecommons.org/publicdomain/zero/1.0/en
dc.titleEnhanced Denitrification Bioreactors Hold Promise for Mid-Atlantic Ditch Drainageen
dc.title.serialAgricultural & Environmental Lettersen
dc.typeArticle - Refereeden
dc.type.dcmitypeTexten
dc.type.dcmitypeStillImageen

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