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United States Department of Agriculture

Agricultural Research Service

Title: Solids Separation, Nitrification-Denitrification, Soluble Phosphorus Removal, Solids Processing System

Authors
item Vanotti, Matias
item Hunt, Patrick
item Szogi, Ariel
item Humenik, Frank - NC STATE UNIV.
item Millner, Patricia
item Ellison, Aprel

Submitted to: Meeting Abstract
Publication Type: Proceedings
Publication Acceptance Date: October 16, 2003
Publication Date: October 16, 2003
Citation: Vanotti, M.B., Hunt, P.G., Szogi, A.A., Humenik, F.B., Millner, P.D., Ellison, A.Q. 2003. Solids separation, nitrification-denitrification, soluble phosphorus removal, solids processing system. In: Proceedings of the North Carolina Animal Waste Management Workshop. p. 30-35.

Technical Abstract: Systems of treatment technologies are needed that capture nutrients, reduce emissions of ammonia and nuisance odors, and kill harmful pathogens. A system of swine wastewater treatment technologies was developed to accomplish many of the tasks listed above. The system greatly increases the efficiency of liquid/solid separation by injection of polymer to increase solids flocculation. Nitrogen management to reduce ammonia emissions is accomplished by passing the liquid through a module where immobilized bacteria transform nitrogen. Subsequent alkaline treatment of the wastewater in a phosphorus module precipitates calcium phosphate and kills pathogens. Treated wastewater is recycled to clean hog houses and for crop irrigation. The system has been pilot tested and is going through full-scale demonstration and verification as part of the Smithfield Foods/Premium Standard Farms/Frontline Farmers Agreement with the North Carolina Attorney General to identify technologies that can replace current lagoons with Environmentally Superior Technology. If the full-scale demonstration proves to be successful, the technology can be used in new systems where the lagoon is omitted.

Last Modified: 7/25/2014