Geo-Congress 2020
Performance Evaluation of Alternative Biofilter Media Amendments
Publication: Geo-Congress 2020: Geo-Systems, Sustainability, Geoenvironmental Engineering, and Unsaturated Soil Mechanics (GSP 319)
ABSTRACT
This work is part of a multi-disciplinary project investigating the use of alternative media for biofiltration systems in Minnesota. Over the last thirty years, the Minnesota Department of Transportation (MnDOT) has implemented biofilters along roadways as a stormwater control measure. These systems must be able to infiltrate and treat the first inch of rainfall onsite to meet state and national regulations. The performance of a biofilter is largely based on its media’s ability to infiltrate water, sustain vegetation, and capture pollutants. To date, MnDOT has relied on sand and compost mixtures for biofilter media amendments. An early phase of this work identified peat as having similar performance characteristics as compost, making it an ideal alternative. A laboratory testing program was also developed during the early phase of work to determine media properties that could be used to predict biofilter performance. Current work focused on characterizing existing biofilters using in situ testing and comparing results to laboratory testing. The comparison of the two methods has enabled an analysis of the predictive capabilities of the laboratory regime. This work also included the instrumentation and monitoring of field sites including a newly constructed peat amended biofilter. Findings from this work have validated the use of peat as a biofilter amendment and shown the developed laboratory testing regime to be a good indicator of field performance. The characterization regime developed through this project and instrumentation methods will be used in the future to identify other beneficial alternative biofilter medias.
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AcKNOWLEDGEMENTS
The authors wish to acknowledge MnDOT for the financial support of this work provided under Contract No. 1003325-31.
REFERENCES
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Information & Authors
Information
Published In
Geo-Congress 2020: Geo-Systems, Sustainability, Geoenvironmental Engineering, and Unsaturated Soil Mechanics (GSP 319)
Pages: 284 - 291
Editors: James P. Hambleton, Ph.D., Northwestern University, Roman Makhnenko, Ph.D., University of Illinois at Urbana-Champaign, and Aaron S. Budge, Ph.D., Minnesota State University, Mankato
ISBN (Online): 978-0-7844-8282-7
Copyright
© 2020 American Society of Civil Engineers.
History
Published online: Feb 21, 2020
Published in print: Feb 21, 2020
ASCE Technical Topics:
- Biological processes
- Chemicals
- Chemistry
- Composting
- Construction engineering
- Construction management
- Engineering fundamentals
- Environmental engineering
- Field tests
- Filtration
- Hydrologic engineering
- Hydrology
- Infiltration
- Laboratory tests
- Organic chemicals
- Organic compounds
- Organic matter
- Project management
- Tests (by type)
- Waste management
- Water and water resources
- Water treatment
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