Bioreactor Design Geometry Effects on Nitrate Removal

dc.contributor.author Christianson, Laura
dc.contributor.author Helmers, Matthew
dc.contributor.author Helmers, Matthew
dc.contributor.author Bhandari, Alok
dc.contributor.department Agricultural and Biosystems Engineering
dc.date 2018-02-13T07:10:35.000
dc.date.accessioned 2020-06-29T22:32:55Z
dc.date.available 2020-06-29T22:32:55Z
dc.date.copyright Fri Jan 01 00:00:00 UTC 2010
dc.date.embargo 2013-03-11
dc.date.issued 2010-06-01
dc.description.abstract <p>Denitrification bioreactors for nitrate removal in agricultural drainage have recently gained attention for their low cost and effectiveness. While research continues to investigate the optimal sizing of these systems, little work has been done on the optimal design geometry (Length to width ratio and cross sectional shape). To address this lack, pilot-scale (1/10th scale) work performed in Iowa during the summer of 2009 explored three shapes of potential bioreactor designs. The objective was to study the nitrate removal effectiveness of each design at various retention times. The pilot bioreactors had a standard volume (0.71 m3) and depth (0.61 m) and different dimensions of 0.76 m x 1.5 m (rectangle), 0.38 m x 3.0 m (channel), and 1.5 m x 1.2 m (trapezoidal). Steady state experiments consisted of the bioreactors being allowed to run at a given retention time for several days/weeks before being changed to a different retention time. A hydrograph flush experiment simulated a drainage hydrograph moving through the bioreactor over the course of a few days. Preliminary results indicated little significant difference between the designs though the channel design seems to provide the most consistent results between the two experiments. Further analysis of this data is expected to guide future full-scale denitrification bioreactor designs.</p>
dc.description.comments <p>This is an ASABE Meeting Presentation, Paper No. <a href="http://elibrary.asabe.org/abstract.asp?aid=32111&t=3&dabs=Y&redir=&redirType=" target="_blank">IDS-CSBE-100073</a>.</p>
dc.identifier archive/lib.dr.iastate.edu/abe_eng_conf/262/
dc.identifier.articleid 1259
dc.identifier.contextkey 3888072
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath abe_eng_conf/262
dc.identifier.uri https://dr.lib.iastate.edu/handle/20.500.12876/275
dc.language.iso en
dc.source.bitstream archive/lib.dr.iastate.edu/abe_eng_conf/262/2010_ChristiansonLE_BioreactorDesignGeometry.pdf|||Fri Jan 14 23:02:22 UTC 2022
dc.subject.disciplines Agriculture
dc.subject.disciplines Bioresource and Agricultural Engineering
dc.subject.keywords Water quality
dc.subject.keywords Drainage
dc.subject.keywords Nitrate
dc.subject.keywords Bioreactor
dc.subject.keywords Denitrification
dc.subject.keywords Design
dc.title Bioreactor Design Geometry Effects on Nitrate Removal
dc.type article
dc.type.genre conference
dspace.entity.type Publication
relation.isAuthorOfPublication 26a812e6-e6de-44ff-b7ea-d2459ae1903c
relation.isOrgUnitOfPublication 8eb24241-0d92-4baf-ae75-08f716d30801
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