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Can Tertiary Phosphorus Removal Reliably Produce 10 7mu;g/L? Pilot Results from Coeur D'Alene, ID

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Abstract:

Spokane River dischargers are faced with very restrictive phosphorus discharge limits. Concentration of 10 μg/L and 50 μg/L total phosphorus (TP) are technically challenging to meet. Recently completed work at the City of Coeur d'Alene highlighted the technical challenges to meet these low limits and their fundamental limiting conditions.

The tertiary phosphorus removal pilot at Coeur D'Alene's wastewater treatment plant was conducted between June and October of 2006. Four different technologies from different manufacturers were tested on their ability to reliably produce effluent total phosphorus concentrations of less than 50 μg/L and less then 10 μg/L.

The demonstration pilot showed that effluent total phosphorus concentration of less than 50 μg/L can be produced by at least two of the tested technologies (DSBP and THS-1). While not fully demonstrated, ZW-500 and DSD2 would also likely be able to meet a 50 μg/L permit. None of the technologies demonstrated the ability to meet a 10 μg/L TP limit. While there were a number of days with 10 μg/L or less during the pilot testing, these occurrences were few and far between.

Document Type: Research Article

DOI: http://dx.doi.org/10.2175/193864707787977190

Publication date: January 1, 2007

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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 These proceedings are not peer reviewed.

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