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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:
Composting Hog Manure – Why Isn’t Everyone Doing It?
Posted in: Environment by admin on January 1, 2005 | No Comments
Composting is a manure management option to consider if there isn’t enough land for manure application. Increased cash flows can be obtained from compost sales only if patience and hard work are present. A composting option should be evaluated in the context of the entire manure management system on the farm. For liquid manure systems, composting may require separation of liquids and solids, which will add an extra step and additional cost. Composting can easily be done with manure from shallow or deep-bedded systems. Composting has also been done using liquid manure directly by blending with straw, corn stover or wood waste. This may be a viable option on farms that have manure with higher solids content. If composting is to be done, there are 2 options. If siting a new operation, it makes sense to consider a shallow litter system, followed by composting the manure. For existing operations, consider the overall manure management and reduce the water content of the manure. Composting of the manure following separation is a good option, but there is the idea of a system that does not require separation.
GAS AND ODOR EMISSIONS FROM SWINE BUILDING MATERIALS
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Survey of Water-Extractable Phosphorus in Livestock Manures
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Poly(vinyl alcohol)/Compost Composites for Biofiltration of Swine Waste Volatiles
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Livestock Operations & Groundwater Quality
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Most people living in rural areas of Manitoba rely on groundwater as their primary source of water. To protect and preserve the quality of belowground water sources, it is important that agricultural producers operate in a responsible manner as stewards not only of the land but also of the water under the land.
Livestock operations are a potential source of groundwater contamination.
– The risk of impacts on potable groundwater supplies can be minimized by:
– locating manure structures, outdoor pens and field manure storage in areas underlain by thick clay
materials
– minimizing the duration of field manure storage before spreading
– applying manure at proper agronomic rates as a fertilizer with due consideration for crop
requirements, soil texture and sensitivity of underlying aquifers.
Pipeline Design Procedures for Cattle and Pig Slurries using a Large-scale Pipeline Apparatus
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A large-scale pipeline apparatus was built to investigate the turbulent flow properties of farm livestock slurries and to enable the development of a pipeline design procedure. The apparatus was designed to measure pressure gradients of liquid flows from 120 to 700 l/min in pipes of different internal diameters (381, 508, 762 and 102 mm). Results were obtained using water, pig slurries containing total solids concentrations Ts up to 44% and dairy cattle slurries with Ts values up to 55%. Measurements of pressure gradient and flow rate were converted into values of wall shear stress and nominal shear rate to produce characteristic relationships for each liquid in each pipe. Hence, it was shown that a three-parameter pipeline design procedure could provide a suitable basis for predicting pressure losses in pipes of other diameters, including surface roughness effects.
Experimental assessment of the design procedure revealed an intrinsic risk of systematic correlation between two of the three parameters. Hence, an approach was devised to alleviate this problem by reducing the number of parameters to two. It was found that the resulting two parameters could each be represented by a linear function of Ts, enabling convenient prediction of pressure losses for other slurries.
The ecology of emerging neurotropic viruses
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