Pilot-Scale Denitrification Bioreactors for Replicated Field Research

dc.contributor.author Hoover, Natasha
dc.contributor.author Soupir, Michelle
dc.contributor.author VanDePol, Richard
dc.contributor.author Goode, Timothy
dc.contributor.author Law, Ji Yeow
dc.contributor.department Agricultural and Biosystems Engineering
dc.contributor.department Iowa Nutrient Research Center
dc.date 2018-05-23T10:58:48.000
dc.date.accessioned 2020-06-29T22:42:39Z
dc.date.available 2020-06-29T22:42:39Z
dc.date.copyright Sun Jan 01 00:00:00 UTC 2017
dc.date.issued 2017-01-01
dc.description.abstract <p>Carbon-based denitrification bioreactors are designed to intercept tile drainage and are a promising technology for reducing NO<sub>3</sub><sup>-</sup> export to surface water. While these systems have been tested extensively in the laboratory, the ability to study in-field bioreactors under controlled conditions with statistical replicates has been limited. Nine pilot-scale bioreactors (5.79 x 1.05 x 1.07 m) were designed and installed for systematic field testing, allowing for variation in retention time, fill material, and influent water quality parameters. Each bioreactor is constructed from a concrete trench in-line with influent flow control, dosing port, flow diffusion, and effluent water level control. Sampling ports are installed at two points in each bioreactor for access to water samples or fill materials. A potassium bromide (KBr) tracer study was conducted and Morrill Dispersion Index (MDI) values averaged 2.8 ± 0.3, indicating plug flow characteristics. The average tracer residence time () was 2.3 ± 0.3 h, in close agreement with the estimated hydraulic retention time (HRT) value of 2.1 ± 0.3 h, which was calculated using a porosity value of 0.70. Hydraulic efficiency was good (λ = 0.78 ± 0.03) and there was no evidence of short circuiting (S = 0.73 ± 0.03). This system is expected to provide useful insight regarding design for improved field performance of denitrification bioreactors.</p>
dc.description.comments <p>This article is from Applied Engineering in Agriculture. 33(1): 83-90. (doi: <a href="http://dx.doi.org/10.13031/aea.11736" target="_blank">10.13031/aea.11736</a>). Posted with permission.</p>
dc.format.mimetype application/pdf
dc.identifier archive/lib.dr.iastate.edu/abe_eng_pubs/789/
dc.identifier.articleid 2074
dc.identifier.contextkey 9806739
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath abe_eng_pubs/789
dc.identifier.uri https://dr.lib.iastate.edu/handle/20.500.12876/1589
dc.language.iso en
dc.source.bitstream archive/lib.dr.iastate.edu/abe_eng_pubs/789/2017_Hoover_PilotScaleDenitrification.pdf|||Sat Jan 15 01:55:17 UTC 2022
dc.source.uri 10.13031/aea.11736
dc.subject.disciplines Agriculture
dc.subject.disciplines Bioresource and Agricultural Engineering
dc.subject.keywords Woodchip bioreactor
dc.subject.keywords Nitrate
dc.subject.keywords Tile drainage
dc.subject.keywords Hydraulic retention time
dc.subject.keywords Hydraulic properties
dc.subject.keywords Tracer test
dc.title Pilot-Scale Denitrification Bioreactors for Replicated Field Research
dc.type article
dc.type.genre article
dspace.entity.type Publication
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relation.isOrgUnitOfPublication 8eb24241-0d92-4baf-ae75-08f716d30801
relation.isOrgUnitOfPublication 2f553ce8-7236-41ae-86cd-837e75627a2f
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