ARS | Publication request: Extraction of soluble phosphorus from swine wastewater

Submitted to: American Society of Agricultural Engineers Meetings Papers
Publication Type: Proceedings
Publication Acceptance Date: July 29, 2002
Publication Date: July 29, 2002
Citation: Vanotti, M.B., Szogi, A.A., Hunt, P.G. 2002. Extraction of soluble phosphorus from swine wastewater. In: Proceedings of the American Society of Agricultural Engineers Annual International Meeting, July 28-31, 2002, Chicago, Illinois. Paper No. 024098. 10 p.

Technical Abstract: Manure phosphorus (P) in excess of the assimilative capacity of land available on farms is an environmental concern often associated with confined livestock production. A wastewater treatment process was developed for removal of phosphorus from livestock wastewater. It includes nitrification of wastewater and increasing the pH of the nitrified wastewater by adding an alkaline earth metal-containing compound to precipitate phosphorus to form an effluent having a specified nitrogen:phosphorus ratio that is useful as a balanced fertilizer or a low P fertilizer for remediation of contaminated soils. The presence of infectious microorganisms is reduced in the useable effluent. The precipitated phosphorus is recovered in a marketable form.