MODELING THE COMPETITION BETWEEN FILAMENTS AND FLOC FORMERS: INTEGRATING DECAY RATE, STORAGE, KINETIC SELECTION, AND FILAMENTOUS BACKBONE THEORY
Abstract:Filamentous bulking in activated sludge systems occurs when filamentous organisms outgrow floc-forming bacteria, and interfere with sludge settling. The kinetic selection and filamentous backbone theories have been used in previous research to predict the outcome of competition between filaments and floc formers. We hypothesize that differences in decay rates and storage abilities also affect this competition. This paper attempts to integrate these four factors into a unified model to predict and explain coexistence in a Completely Mixed Reactor (CMR). The modeling results were shown to generically predict coexistence of the two types of microorganisms, and sensitivity analysis was performed at a specific dilution rate to identify the main parameters that significantly impact the simulation results. Monte-Carlo simulation was performed to assess the potential for bulking in the reactor. The ranges of dilution rates wherein one group outcompeted the other were delineated. This analysis showed that the effect of storage was high at low dilution rates, while the decay effect became significant at high dilution rates.
Document Type: Research Article
Publication date: 2002-01-01
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 These proceedings are not peer reviewed. 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