Stimulating Denitrification in Agricultural Headwater Streams Using Elemental Sulfur
The extensive use of nitrogen fertilizers in agriculture has led to widespread eutrophication. We explored sulfur-based autotrophic denitrification in agricultural headwater streams as means to remove nitrogen near the source. A stream mesocosm, simulating a headwater drainage ditch, was amended with elemental sulfur chips. Nitrate removal efficiencies were as high as 99%, corresponding to effluent concentrations below 1 mg/L NO3 −-N. However, nitrate removals decreased over time, concurrent with accumulation of biomass on the bed surface. A model was developed to describe the hydraulic and biological reactions taking place within the mesocosm. The model captured trends in bulk liquid nitrate concentrations but provided reasonable accuracy only when using a high diffusive exchange coefficient. This result suggests advective exchange with the bulk may be significant and biological activity is limited to the top few millimeters of the sulfur bed. Results suggest this approach is promising, although further research under more realistic conditions is needed.
No Reference information available - sign in for access.
No Citation information available - sign in for access.
No Supplementary Data.
No Article Media
Document Type: Research Article
Publication date: 01 January 2008
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 These proceedings are not peer reviewed.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