Enhancing Copper Removal in Secondary Treatment by Chemical Addition

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Abstract:

Chemical addition was tested for enhancing copper removal in the University of California, Davis (UCD) wastewater treatment plant (WWTP). Wastewater from the headworks and oxidation ditch were treated with ferric chloride and two organic precipitants in jar tests. Ferric chloride had little effect on residual dissolved copper, while the organic precipitants reduced it below 10 μg/L. In a full-scale trial, dose of 8 ppm to 13 ppm organic polymer effected a mean reduction in dissolved copper concentration of 2 μg/L, sufficient to maintain compliance with the WWTP's 13-μg/L water quality-based effluent limit for copper. Full-scale implementation required no additional solids separation or handling equipment.

Document Type: Research Article

DOI: http://dx.doi.org/10.2175/193864702784247116

Publication date: January 1, 2002

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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 These proceedings are not peer reviewed.

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