Denitrifying Bioretention Systems for Control of Non-Point Nitrogen Sources
Side-by-side pilot-scale experiments were conducted with bioretention systems utilizing both elemental sulfur and wood chips as substrates for denitrification at varying hydraulic loading rates (HLR), influent concentrations and wetting and drying periods. Total N removal efficiencies greater than 88% were observed in both units with synthetic stormwater. In field tests with dairy farm runoff and high HLR, moderate removal efficiencies were observed for COD (46%), suspended solids (69%), total P (66%), and total N (65%). During the second season, operational changes on the farm resulted in lower organic, solids and nutrient loadings resulting in improved bioretention system effluent quality, especially with regard to suspended solids (81% removal) and total N (82% removal). The systems were not hydraulically overloaded even at 20 times the normal HLR. Somewhat better overall performance and cold temperature tolerance was observed in the wood-based unit than the sulfur based unit.
No Reference information available - sign in for access.
No Citation information available - sign in for access.
No Supplementary Data.
Document Type: Research Article
Publication date: 2009-01-01
More about this publication?
- Proceedings of the Water Environment Federation is an archive of papers published in the proceedings of the annual Water Environment Federation® Technical Exhibition and Conference (WEFTEC® ) and specialty conferences held since the year 2000. These proceedings are not peer reviewed. A subscription to the Proceedings of the Water Environment Federation includes access to most papers presented at the annual WEF Technical Exhibition and Conference (WEFTEC) and other conferences held since 2000. Subscription access begins 12 months after the event and is valid for 12 months from month of purchase. A subscription to the Proceedings of the Water Environment Federation is included in Water Environment Federation (WEF) membership.
WEF Members: Sign in (right panel) with your IngentaConnect user name and password to receive complimentary access. Access begins 12 months after the conference or event
- Subscribe to this Title
- Membership Information
- About WEF Proceedings
- WEFTEC Conference Information
- Learn about the many other WEF member benefits and join today
- Ingenta Connect is not responsible for the content or availability of external websites