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Beyond Desktop Evaluation: Key Design Criteria for Mixing and Settling of Magnetite-Impregnated Mixed Liquor

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Abstract:

The Mystic Water Pollution Control Facility (WPCF) in Stonington, Connecticut is in need of a process upgrade to meet future requirements for effluent total nitrogen. The plant layout does not allow for conventional expansion and requires implementation of a biological process option that provides a high level of treatment in a constrained site. A desktop evaluation of small-footprint alternatives indicated that the BioMag process was the most space-efficient, cost-effective and sustainable option for implementation at the Mystic WPCF. A full-scale demonstration of the BioMag process was completed from September 2009 through January 2010 to verify achievement of required process performance and to test the impacts of magnetite-impregnated mixed liquor on settling, re-suspension and other mechanical aspects of successful treatment.

Keywords: BioMag; activated sludge; ballasted biological treatment; magnetite; nitrogen removal

Document Type: Research Article

DOI: http://dx.doi.org/10.2175/193864711802713351

Publication date: January 1, 2011

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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 These proceedings are not peer reviewed.

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