Water Quality Improvement through Bioretention Media: Nitrogen and Phosphorus Removal
Abstract
High nutrient inputs and eutrophication continue to be one of the highest priority water quality problems. Bioretention is a low‐impact development technology that has been advocated for use in urban and other developed areas. This work provides an in‐depth analysis on removal of nutrients from a synthetic stormwater runoff by bioretention. Results have indicated good removal of phosphorus (70 to 85%) and total Kjeldahl nitrogen (55 to 65%). Nitrate reduction was poor (<20%) and, in several cases, nitrate production was noted. Variations in flowrate (intensity) and duration had a moderate affect on nutrient removal. Mass balances demonstrate the importance of water attenuation in the facility in reducing mass nutrient loads. Captured nitrogen can be converted to nitrate between storm events and subsequently washed from the system. Analysis on the fate of nutrients in bioretention suggests that accumulation of phosphorus and nitrogen may be controlled by carefully managing growing and harvesting of vegetation.
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The increase in phosphorus concentration from influent to effluent of bioretention systems is largely offset by the large volume of water that is infiltrated, resulting in pollutant load reductions.
“While this indicates that the concentration of phosphorus may increase from the influent to the effluent of bioretention systems, this increase in concentration is largely offset by the large volume of water that is infiltrated, resulting in pollutant load reductions (Davis et al. 2006; Zhou et al. 2023).”
From Green Infrastructure in Series to Treat Stormwater Runoff from a Highway Overpass (2024) · cites this paper as Davis et al. 2006
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Ashoori, N., Teixido, M., Spahr, S., LeFevre, G. H., Sedlak, D. L., & Luthy, R. G. (2019) · Water Research · doi:10.1016/j.watres.2019.01.040 · Cited by 197 · see citing works
Green Infrastructure in Series to Treat Stormwater Runoff from a Highway Overpass
Bodus, B., Branca, J., & McDonald, W. (2024) · Journal of Sustainable Water in the Built Environment · doi:10.1061/jswbay.sweng-569 · Cited by 2 · see citing works
- Authors
- Davis, A. P., Shokouhian, M., Sharma, H., & Minami, C.
- Venue
- Water Environment Research
- Publisher
- Wiley
- Published
- 2006-03
- Volume
- 78
- Issue
- 3
- Pages
- 284-293
- ISSN
- 1061-4303
- 1554-7531
- Cited by
- 366
- References
- 0
- Language
- en
- Funders
- Department of Environmental Resources
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