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EXTRACTION OF SOLUBLE PHOSPHORUS IN A SWINE WASTE TREATMENT SYSTEM WITHOUT LAGOON
Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan www.asabe.orgCitation: Pp. 603-611 in the Ninth International Animal, Agricultural and Food Processing Wastes Proceedings of the 12-15 October 2003 Symposium (Research Triangle Park, North Carolina USA), Publication Date 12 October 2003. 701P1203.(doi:10.13031/2013.15300)
Authors: M. B. Vanotti, P. G. Hunt, A. A. Szogi, and A. Q. Ellison
Keywords: Phosphorus removal, animal waste treatment, swine wastewater, pathogens, CAFO, manure P, hog lagoons, calcium phosphate
We found that soluble phosphorus can be easily removed from animal wastewater, which has had
a nitrification pre-treatment, in the form of calcium phosphate that can be used as a fertilizer. In
the process, carbonate and ammonium buffers contained in liquid waste must be at least reduced
or eliminated during the nitrification pre-treatment. This substantially reduces the overall
chemical demand needed for optimum phosphorus precipitation and removal.