Efficacy of a liquid/solid isolation system for swine manure
2005
Von Bernuth, R.D. | Hill, J.D. | Henderson, E. | Godbout, S. | Hamel, D. | Pouliot, F.
Researchers at Michigan State University (MSU), Institut de Recherche et de Developpement en Agroenvironnement (IRDA) in Quebec, Canada, and Centre de Developpement du Porc du Quebec (CDPQ) in Sainte-Foy, Quebec, Canada, collaborated to determine the efficacy of the liquid/solid isolation swine manure handling system installed at MSU. The system utilizes a V-shaped pit floor with an adapted scraper installed beneath the slatted floor of the swine pens. Feces and other solids stick on the pit floor slope and are scraped to a collection point. The liquid including urine runs to a center pipe and is pumped to a holding tank. There were six objectives: determine the efficacy of the system to isolate phosphorus (P) in the collected solid fraction (SF) of manure, determine the efficacy of isolating water in the liquid fraction, determine the total mass of manure produced, measure the ammonia and hydrogen sulfide concentrations in the air in the facility, determine the P mass balance, and determine pig performance. All objectives were met. Ninety-one percent of the P was in the SF, and the SF had about 66% moisture content. Ninety-seven percent of the P was accounted for. Ammonia concentration never exceeded 7.5 ppm, and hydrogen sulfide never reached the minimum detection limit of 0.5 ppm. Average daily gain was 0.86 kg, and feed efficiency was 2.53.
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