Glycerol-Driven Denitrification: Evaluating the Specialist-Generalist Theory and Partial Denitrification to Nitrite
In order to comply with stringent total nitrogen (TN) limits, supplemental carbon must be added to improve biological nutrient removal (BNR) processes. This research investigated alternatives to methanol that can be used in full-scale applications, such as glycerol (also known as glycerin). The objective was to verify two unusual observations reported for glycerol supplementation for denitrification: increasing COD demand over time (yield) and partial denitrification resulting in nitrite buildup. Three sequencing batch reactors (SBRs) were operated to assess reagent grade methanol, reagent grade glycerol, and a biodiesel glycerol waste. The methanol reactor performed as expected. Over-dosing carbon led to very low levels of residual nitrogen in all the reactors, while under-dosing resulted in incomplete removal of TN. Nitrite accumulation in the glycerol reactors was consistent and significant, whereas the methanol reactor did not exhibit this phenomenon. Increased yield for glycerol over time after startup and anoxic storage of COD were apparent.
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: 2012-01-01
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 These proceedings are not peer reviewed.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