Technical Note: The Potential of Municipal Yard Waste to be Denitrification Bioreactor Fill

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dc.contributor.author Christianson, Laura
dc.contributor.author Hoover, Natasha
dc.contributor.author Helmers, Matthew
dc.contributor.author Bhandari, Alok
dc.contributor.author Helmers, Matthew
dc.contributor.department Agricultural and Biosystems Engineering
dc.date 2018-02-13T07:20:51.000
dc.date.accessioned 2020-06-29T22:38:44Z
dc.date.available 2020-06-29T22:38:44Z
dc.date.copyright Sun Jan 01 00:00:00 UTC 2012
dc.date.embargo 2013-03-13
dc.date.issued 2012-01-01
dc.description.abstract <p>The use of denitrification bioreactors to mitigate nitrate in agricultural drainage has recently gained much interest in the Midwestern United States and in similarly drained agricultural regions. However, as the number of bioreactor installations has increased, questions have been raised about the supply and consistency of denitrification carbon source material. In selecting such material, there is an important balance between optimal media properties (e.g., hydraulic properties, chemical composition), practicality, and material cost. The use of free material such as municipal yard waste may help minimize the cost of this voluntary water quality improvement strategy in the Midwestern United States, but may not provide other sufficient media properties. To investigate this, pilot-scale bioreactors were used to compare hardwood chips with free, chipped municipal yard waste in terms of nitrate removal potential and changes in the media. Sampling of bioreactor influent and effluent over a range of retention times showed the yard waste had higher removal efficiencies at a given retention time and higher removal rates than the woodchips. However, buried carbon media bags revealed the yard waste lost weight to a greater extent and more consistently than the woodchips meaning the woodchips had a half-life over two times greater than the yard waste. This, combined with the low carbon-to-nitrogen ratio of the yard waste, indicated yard waste material is not ideal for bioreactor installations that are intended to be low maintenance for at least ten years.</p>
dc.description.comments <p>This article is from <em>Applied Engineering in Agriculture </em>28, no. 6 (2012): 853–859.</p>
dc.format.mimetype application/pdf
dc.identifier archive/lib.dr.iastate.edu/abe_eng_pubs/304/
dc.identifier.articleid 1590
dc.identifier.contextkey 3899642
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath abe_eng_pubs/304
dc.identifier.uri https://dr.lib.iastate.edu/handle/20.500.12876/1056
dc.language.iso en
dc.source.bitstream archive/lib.dr.iastate.edu/abe_eng_pubs/304/2012_ChristiansonLE_PotentialMunicipalYard.pdf|||Fri Jan 14 23:28:42 UTC 2022
dc.subject.disciplines Agriculture
dc.subject.disciplines Bioresource and Agricultural Engineering
dc.subject.keywords Denitrification bioreactor
dc.subject.keywords Agricultural drainage
dc.subject.keywords Woodchip
dc.subject.keywords Yard waste
dc.subject.keywords Nitrate
dc.title Technical Note: The Potential of Municipal Yard Waste to be Denitrification Bioreactor Fill
dc.type article
dc.type.genre article
dspace.entity.type Publication
relation.isAuthorOfPublication 26a812e6-e6de-44ff-b7ea-d2459ae1903c
relation.isOrgUnitOfPublication 8eb24241-0d92-4baf-ae75-08f716d30801
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