Advanced Denitrification in Bioretention Systems Usinging Woodchips as a Primary Organic Carbon Source

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dc.contributor.advisorDavis, Allen Pen_US
dc.contributor.authorPeterson, Ian Jamesen_US
dc.contributor.departmentCivil Engineeringen_US
dc.contributor.publisherDigital Repository at the University of Marylanden_US
dc.contributor.publisherUniversity of Maryland (College Park, Md.)en_US
dc.date.accessioned2013-10-10T05:32:52Z
dc.date.available2013-10-10T05:32:52Z
dc.date.issued2013en_US
dc.description.abstractBioretention systems still lack the ability to effectively mitigate nitrogen concentrations from urban stormwater. Column tests were conducted to evaluate the effect of nitrate concentration, stormwater retention time, limestone addition, and woodchip species, size, and mass percentage on the bioretention denitrification process. Denitrification of artificial stormwater appeared to follow pseudo-first-order kinetics. A 0.8 day average retention time showed the highest nitrate removal percentage of 82.4 + 0.4%. Longer retention times correspond to greater removal efficiency. Willow Oak and Red Maple woodchips resulted in the highest total nitrogen removal efficiencies at 61.9 + 0.8% and 61.8%, respectively. Smaller woodchips and higher woodchip mass percentage corresponded to greater nitrate removal efficiencies, but also higher organic nitrogen leaching. Media containing 4.5% 5 mm Willow Oak woodchips by mass represented optimum conditions with a pseudo-first-order denitrification rate of 4.1 + 4.6 day-1 with nitrate concentrations of 1.5 to 4.5 mg/L N.en_US
dc.identifier.urihttp://hdl.handle.net/1903/14629
dc.subject.pqcontrolledEnvironmental engineeringen_US
dc.subject.pquncontrolledBioretentionen_US
dc.subject.pquncontrolledDenitrificationen_US
dc.subject.pquncontrolledNitrogenen_US
dc.subject.pquncontrolledStormwateren_US
dc.subject.pquncontrolledWoodchipsen_US
dc.titleAdvanced Denitrification in Bioretention Systems Usinging Woodchips as a Primary Organic Carbon Sourceen_US
dc.typeThesisen_US

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