Using CFD to Select Anaerobic Digestion Mixing Systems
Abstract:As part of a bioenergy master plan (BMP), the city of Des Moines, Iowa, Wastewater Reclamation Authority (WRA) identified facility improvements that included upgrades to the digesters' mixing system. This paper describes the use of computational fluid dynamics (CFD) modeling as a design tool to first evaluate different mixing systems, including mechanical draft tubes, gas draft tubes, and pumped recirculation, and then optimize the size of the selected system. The traditional approach used to determine the appropriate mixing system capacity identified a larger capacity mixing system than the CFD-based recommendation. By using CFD to identify the optimal mixing system, the utility saved approximately 700,000 in capital costs and expects to save up to 800,000 kilowatt hours per year in energy consumption.
Document Type: Research Article
Publication date: 2010-01-01
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 These proceedings are not peer reviewed.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