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Pretreatment Requirements for Membrane Bioreactors

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Abstract:

Adequate pretreatment including fine screening is essential to the stable, long-term operation of membrane bioreactors (MBR) used to treat municipal wastewater. The amount of screenings generated by a screen with 1–2 mm size openings ranges between 10–25 dry mg/L. The cost of fine screening represents less than 3% of the total investment cost for a MBR-based wastewater treatment facility. Case studies for three large MBR plants are presented illustrating that the membranes are free of trash and sludge accumulation after a cumulative 9 years of operation. Finally, concepts for mixed liquor screening are presented and the pros and cons of this approach are analyzed.

Document Type: Research Article

DOI: http://dx.doi.org/10.2175/193864706783750169

Publication date: January 1, 2006

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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 These proceedings are not peer reviewed.

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