Analysis of Bioretention Media Specifications and Relationships to Overall Performance
Publication: World Environmental and Water Resources Congress 2009: Great Rivers
Abstract
Bioretention performance specifications differ greatly among jurisdictions. Selected specifications from Prince George's County, MD; MDE; Fairfax County, VA; VDCR; and DNREC are compared for hydrologic management effectiveness, pollutant removal efficiency, construction and maintenance costs, and constructability. Optimal construction and performance requirements are summarized, with the necessity of variable criteria for differing pollutants acknowledged. Specification recommendations are tailored accordingly. Shallow cells with a surface mulch layer are recommended for removal of metals and particulate pollutants. Deeper cells having thick vegetative cover instead of top dressing are recommended for nutrient removal. Additionally, aluminum water treatment residual as a media amendment for phosphorus removal is recommended. This combined with an anoxic saturated zone for nitrogen removal may prove ideal for combined nitrogen and phosphorus removal.
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Information
Published In
World Environmental and Water Resources Congress 2009: Great Rivers
Pages: 1 - 9
Copyright
© 2009 American Society of Civil Engineers.
History
Published online: Apr 26, 2012
ASCE Technical Topics:
- Business management
- Chemical compounds
- Chemical elements
- Chemicals
- Chemistry
- Construction engineering
- Construction management
- Environmental engineering
- Jurisdiction
- Laws and regulations
- Legal affairs
- Nitrogen
- Nutrient pollution
- Particle pollution
- Phosphorus
- Pollution
- Practice and Profession
- Retention basins
- Stilling basins
- Water pollution
- Water treatment
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