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DEVELOPMENT OF CRYSTALLIZATION PROCESS ON PHOSPHORUS FROM ACTIVATED SLUDGE

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Abstract:

A phosphorus recovery system based on a crystallization method and consisting of a phosphorus strip tank, a solid-liquid separation tank and a crystallization unit was operated continuously for a long time. The recovery percentage observed was approximately 75% under conditions of 1 hr of contact time at each stage, 50 mg/L of calcium addition at each stage, a pH level of 7.5 to 7.8 in the first stage and a pH level of 8.0 to 8.3 in the second stage.

The resulting phosphorus-coated seed crystal is reusable as fertilizer after simple drying.

Document Type: Research Article

DOI: http://dx.doi.org/10.2175/193864702784900462

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 These proceedings are not peer reviewed.

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