Understanding urban stormwater denitrification in bioretention internal water storage zones

Conventional free‐draining bioretention systems promote nitrate production and continual leaching to receiving waters. In this study, laboratory tests demonstrated the efficacy of an internal water storage zone (IWSZ) to target nitrate removal via denitrification. Experimental results confirmed that...

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Bibliographic Details
Published in:Water environment research 2019-01, Vol.91 (1), p.32-44
Main Authors: Igielski, Sara, Kjellerup, Birthe V., Davis, Allen P.
Format: Article
Language:English
Subjects:
Anaerobiosis
Bacteria
Biodegradation
Biodiversity
biofilm
Biofilms
bioretention
Carbon - metabolism
Carbon sources
Cities
Community composition
Denitrification
Drainage systems
Electron microscopy
Heterogeneous structure
Hydraulic retention time
Hydrodynamics
Internal water
Laboratory tests
Leaching
Lignocellulose
Nitrate removal
Nitrates
Nitrification
Nitrogen removal
Nutrient availability
Nutrient removal
Pretreatment
Receiving waters
Removal
Retention
Retention basins
Retention time
rRNA 16S
Scanning electron microscopy
storage
Stormwater
Substrates
Water - chemistry
Water Pollutants, Chemical - isolation & purification
Water Pollutants, Chemical - metabolism
Water storage
Water Supply
Willow
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Summary:Conventional free‐draining bioretention systems promote nitrate production and continual leaching to receiving waters. In this study, laboratory tests demonstrated the efficacy of an internal water storage zone (IWSZ) to target nitrate removal via denitrification. Experimental results confirmed that the carbon substrate characteristics (Willow Oak woodchip media) and the hydraulic retention time of nitrified stormwater affected nitrate removal performance. A 2.6‐day batch treatment time reduced 3.0 mg‐N/L to
ISSN:1061-4303
1554-7531
DOI:10.2175/106143017X15131012188024