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Bioretention Systems Optimized for Denitrification: Stormwater Management Practice Design Recommendations for Philadelphia

Neske, Willow
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Genre
Research project
Date
2022
Advisor
Keston, Geoff
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Group
Department
Engineering
Subject
Philadelphia (Pa.). Water Department
 Urban runoff--Management
 Storm water retention basins
Permanent link to this record
http://hdl.handle.net/20.500.12613/7503
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Livingstone Undergraduate Research Awards
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DOI
http://dx.doi.org/10.34944/dspace/7481
Abstract
This paper proposes bioretention design features for land developers in the Philadelphia area. For areas that experience intermittent storms that produce high volumes of runoff and high concentrations of metals and inorganic pollutants, the paper recommends constructing bioretention systems with dimensions following the Philadelphia Water Department’s bioretention sizing table. The basin media should consist of loam or sandy loam modified with a carbon-rich amendment, while the drainage layer media should consist of an amended gravel/woodchip mixture. Three exploratory, inexpensive amendments — waste tire crumb rubber, coconut coir fiber, and biochar — were evaluated to enhance the performance of the bioretention system; these carbon-based adsorbents have been proven to remove metals and inorganic nutrients from contaminated water. By pyrolyzing coconut coir fiber at around 300 deg C, biochar amendments to the soil and internal water storage layers could enhance a bioretention system’s capacity to adsorb metals while also improving microbial and plant mediated nutrient removal and water retention potential. The bioretention system is expected to meet the PWD’s requirements for metal and inorganic nutrient pollution removal even in excessive circumstances, thereby allowing the developer’s project to proceed as intended while protecting combined wastewater systems and the surrounding urban environment from excessive contaminated runoff.
Description
This research project was completed as part of the Engineering 2196 Technical Communication course.
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Citation to related work
Livingstone Undergraduate Research Awards website: https://sites.temple.edu/livingstone/2022-livingstone-undergraduate-research-award-in-stem/
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