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There are many instances where biological nutrient removal (BNR) plants are not operating very well as a result of some oversight of the impact of hydraulics on plant design. These problems are not always apparent and the paper will highlight some common problems and the effect of these hydraulic oversights on plant operation and performance. Issues covered include the control of oxygen in the feed to the anaerobic zone, flow splitting, short-circuiting, mixing of recycle flows, mixed liquor recycle flow rates and clarifier issues. Several examples will be given of how specific hydraulic problems with BNR systems have been resolved.

Document Type: Research Article


Publication date: January 1, 2004

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  • 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 These proceedings are not peer reviewed.

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