Effect of Mixed Liquor Suspended Solids on the Oxygen Transfer Rate in Full Scale Membrane Bioreactors
Abstract:One of the key parameters for membrane bioreactor (MBR) design and operation is the air supply and the related energy consumption. The objective of this work was to investigate how the alpha factor varies with MLSS for both fine and coarse aeration systems in full scale MBR plants. Oxygen transfer rates were determined in two MBR plants with large MLSS variations using (i) an indirect method using mass balances to estimate the daily average OTR on a long term period; (ii) direct in situ oxygen transfer tests with 3 different methods to measure the instantaneous OTR. The various methods were used to verify and/or supplement each other. The results from both plants agree and suggest an alpha value for fine bubble between 0.32 and 0.41 at 10 g MLSS/L. It appears that MLSS impacts alpha of coarse and fine bubble in a similar way, even though the coarse bubble alpha values are higher than for fine bubble (e.g. 0.57 at 10 g/L).
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 These proceedings are not peer reviewed. 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