Waste Handling for Swine Production. Lori Marsh, Associate Professor, Biological Systems Engineering, Virginia Tech. Swine Production. Swine production is most commonly accomplished indoors. Typically farms specialize in one of four production strategies: Breeding/Gestation; Farrowing;
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Lori Marsh, Associate Professor, Biological Systems Engineering, Virginia Tech
Swine production is most commonly accomplished indoors. Typically farms specialize in one of four production strategies:
Sows with piglets, shortly after birth.
Piglets in a nursery room.
Swine in a grow out room.
The manure handling system for swine production typically depends on the climate where the facility is located. In warmer climates, pigs are most commonly raised on slatted floors with a shallow pit below. Manure falls into the pit and is flushed out to a lagoon. The lagoon serves as an anaerobic treatment unit.
Typical lagoon for treating swine manure.
The liquid fraction of the lagoon is pumped out and land applied throughout the growing season. Typically, sludge is allowed to accumulate in the lagoon for several years before it is removed.
Lagoon effluent being applied to a pasture.
In cold climates, lagoons do not function well. In this case, swine are typically raised on a slatted floor over a deep pit. Manure is stored in the pit until it is land applied.
Application of manure pumped from a storage pit.
Some swine are produced on an open lot or on “deep pack.” This represents a small percentage of pork production.
Waste storage on deep pack is inside the building. Removal occurs at the end of the grow out period. The potential for composting this material is high.