Stormwater Symposium

Oral

398048 - Chasing the Silver Bullet: Adventures in Alternative Stormwater Filtration Media (Iron Enhanced Sand and Spent Lime)

Thursday, June 7
8:30 AM - 10:00 AM
Location: Greenway AB

Today’s stormwater practitioners are desperate for sustainable solutions that will filter stormwater to bind and remove stormwater pollutants in a cost-effective way. Where infiltration is impossible, municipalities and industrial operators are searching for new and improved methods for removing particulate and dissolved phosphorus, metals and other pollutants from their stormwater to meet permit requirements and to improve the quality of waters leaving their sites. In addition, the stormwater community has great interest in putting byproducts, such as iron (as elemental iron) aggregate and spent lime, to good use in stormwater filters. Iron is recycled from several sources and spent lime is a byproduct of drinking water treatment. It’s a tall order, but there are some exciting recent advances in using Iron Enhanced Sand Filtration (IESF) and Spent Lime Filtration (SLF) for stormwater. However, every success story has a cautionary backstory that has informed its success. This presentation will present these stories, including highlighting best practices in the design, implementation, monitoring and maintenance of Iron Enhanced Sand and Spent Lime Media filters for municipal and industrial stormwater treatment.

Keith Pilgrim, PhD

Barr Engineering Company

Presentation(s):

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Erin Anderson Wenz, PE, ENV SP

Senior Water Resources Engineer
Barr Engineering Company

Erin Anderson Wenz has over 20 years of experience at Barr Engineering Company working on projects involving hydraulics and hydrology, including both stormwater and lake water quality modeling for watershed districts and municipalities. She has managed strategic lake management plans as well as total maximum daily load (TMDL) studies for several Minnesota lakes. Her project work also includes the creation of watershed and municipal stormwater management plans and the design and construction of low-impact development features such as rain gardens, biofiltration basins, porous pavement, and tree trenches for both large and small retrofit sites. Erin is also trained in applying the Envision™ Sustainable Infrastructure Rating System to projects.

Presentation(s):

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398048 - Chasing the Silver Bullet: Adventures in Alternative Stormwater Filtration Media (Iron Enhanced Sand and Spent Lime)



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