Nitrification in one week without external seeding — Startup of a new BNR plant
Abstract:The City of Boulder converted their existing TF/SC process to a 25 mgd BNR activated sludge plant. Initial construction required removing 31-percent of the trickling filter capacity while still meeting effluent permit limits during construction. The TF/SC process was operated to develop nitrifying organisms to serve as seed for startup of the new activated sludge system. This made importation of seed sludge unnecessary. Monitoring of the secondary clarifiers was important to avoid excessive solids loading rates. Full nitrification was achieved within approximately one week after startup. A calibrated Biowin™ simulator was used for design as well as to closely predict startup and operating conditions. Dynamic simulations were used to define stable operating SRTs at each mixed liquor temperature. The value of using the operational tools developed for this project was demonstrated by the results during startup and the first year of operation.
Document Type: Research Article
Publication date: January 1, 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 These proceedings are not peer reviewed. WEF Members: Sign in (right panel) with your IngentaConnect user name and password to receive complimentary access.
- Subscribe to this Title
- Membership Information
- About WEF Proceedings
- WEFTEC Conference Information
- Ingenta Connect is not responsible for the content or availability of external websites