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Industry Partners
Prairie Swine Centre is an affiliate of the University of Saskatchewan
Prairie Swine Centre is grateful for the assistance of the George Morris Centre in developing the economics portion of Pork Insight.
Financial support for the Enterprise Model Project and Pork Insight has been provided by:
ANALYSIS AND DESIGN PARAMETERS FOR INCLINED ROTORS USED FOR MANURE DISPERSAL ON BROADCAST SPREADERS FOR SOLID MANURE
Posted in: Environment by admin on January 1, 2004 | No Comments
Greenhouse gas emission during storage of pig manure on a pilot scale
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A Theory of Packer Self Production in the Swine Industry
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Turning Manure to Fertilizer the PSF Way
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The objective of the project, the construction of the Crystal Peak fertilizer plant, is to convert hog manure into a high value commercial fertilizer using a process developed and patented by Premium Standard Farms and its technology partners. The first step is that collected manure will be processed through an Internal Recirculation Process (IRP). Separated liquids are acidified with sulfuric acid to minimize odor and ammonia and will be used for flushing fresh manure out of the barn. The concentrated solids will be transferred to a digester, the second step. The digester used is an in-ground digester heated to 90 F using waste heat from the dryer. Organic material is broken down and the resulting methane is captured. The third step is when the effluent from the digester is pumped to a settling basin. The settled solids will be concentrated using a centrifuge, and liquids are pumped to a holding pond where they will be stabilized with sulfuric acid. The fourth step is when these liquids will be transferred to an area where they will be frozen. This allows the pure water to separate as it freezes first and thaws last. While thawing the liquids will be directed to either a brine pond or to a treated water pond for recycling. The fifth step is the brine pond. It will contain a high concentration of minerals and it will be mixed with the solids obtained after the centrifugation. It will then be formed into pellets, dried and charred using methane derived from the digester. The emissions from this process will also be captured and recycled. The pellets will be marketed as high-quality fertilizer. The final step is when the liquid harvested from the freeze-thaw process is stored in a water storage cell and either used as irrigation water or further processed to produce drinking water for the pigs on site.
This process is a combination of technologies for solving environmental issues facing the swine industry. Energy costs are reduced, waste is reduced and there is a marketable product at the end.
New regulations to minimize water impairment from animals rely on management practices
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Water pollution from concentrated animal feeding operations (CAFOs) led to revised federal regulations in the United States. The regulations provide for the greater management of potential sources of agricultural contamination and impose additional financial costs on producers. Along with a duty to secure a permit, significant changes address coverage of pollutants, separation of production and land application areas, effluent limitation guidelines, and differentiating agricultural storm water discharges from other discharges. The revised provisions require more producers to secure National Pollutant Discharge Elimination System permits and mandate that large CAFOs develop technology-based effluent discharge limitations involving best management practices. Medium- and small-sized CAFOs need to adopt technology-based effluent discharge requirements employing best professional judgment. For farms raising animals that are not CAFOs, voluntary management practices may be employed to intercept pollutants before they enter waterbodies. Additional educational efforts promoting the implementation of further management practices that address the agricultural impairment of water resources may be needed.
Amebae and ciliated protozoa as causal agents of waterborne zoonotic disease
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FARM–LEVEL OPTIMIZATION OF BMP PLACEMENT FOR COST–EFFECTIVE POLLUTION REDUCTION
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