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Phosphorus Reduction Using DWTRs
Image above shows installation of stormwater filter at the Industrial Road site in South Burlington, VT (Site B).
In this research project, we studied the impact of adding drinking water treatment residuals (DWTR) to two different stormwater filters. The University of Vermont (UVM) team captured samples after 47 storms and analyzed for phosphorus (P) before and after the addition of the sand filter to measure nutrient capture. The results suggest that using 3-5% concentrations of this waste product is effective in reducing phosphorus, including dissolved P.
Two quotes about the impact of the project:
"This research has already been featured in a tour of stormwater infrastructure hosted by Lake Champlain Sea Grant. The audience included consultants, state agency representatives, city personnel, researchers, and students. In the future, the results of this project can be used to inform design of stormwater infrastructure to enhance phosphorus removal"
"The P removal efficiency value for the Site B sand filter is included in VTrans' progress reporting to ANR for the Lake Champlain P TMDL. Future application of this project's results may include developing specifications for DWTR amendment to sand filters and other structural stormwater practices, both at VTrans and for consideration in updates to the VT Stormwater Management Manual"
View the Final Report
View the 2024 Fact Sheet
View the 2024 Poster
Visit the Project Page
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