THE INFLUENCE OF SLUDGE HOLDING TIMES ON THE LEACHING OF P IN ENHANCED BIOLOGICAL PHOSPHORUS REMOVAL (EBPR) SYSTEMS
This study investigates the release of phosphorus during dewatering operations of EBPR systems. On site and laboratory measurements were performed on sludges from a full-scale 88- MGD plant which removes phosphorus biologically. Soluble COD, TP, and OP measurement were made along the sludge handling system. In the laboratory, thickened primary and thickened secondary sludges and their mixture were evaluated for phosphorus release. Phosphorus release was also investigated on aerated sludge mixtures. Overall, the results of this study demonstrate that, in addition to anaerobic digestion and thickening, sludge storage and conditioning operations significantly contribute to phosphate release from EBPR, affecting its performance. The release is facilitated by the soluble COD content of the primary sludge. Minimizing P release by sludge aeration may not be operationally possible or economically viable for existing plants. Alternative solutions to minimize P-release during sludge dewatering include operating dewatering facilities more often and storing primary and secondary sludges separately. These alternatives may not be viable for some existing plants, but they can be used to guide design of future EBPR facilities.
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: 2003-01-01
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 These proceedings are not peer reviewed.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