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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:
Integrated Waste Management Approaches (Integrated Waste Management Solutions)
Posted in: Environment by admin on January 1, 2005 | No Comments
Higher energy prices have motivated some hog producers to switch to coal to heat their barns over winter. An alternative solution to this is hog manure. Three integrated waste management initiatives help to address public concern on odour, water contamination, and animal and people welfare. Bio-Terre Systems in Canada is taking the approach of low temperature anaerobic digestion of manure. This system uses special bacteria that require no oxygen to function. The digestion of manure will result in the emission of methane and biogas, which can be used to generate energy. Home Farm Technologies Inc. processes manure through their Enviro Reactor which mechanically and chemically separate solids from liquids. The solids can be either composted or used as fuel in the Energy Reactor or Gasifier to produce steam that runs a turbine generator producing thermal and/or electrical energy. Clear-Green Environmental Inc. has a project in Cudworth, Saskatchewan that produces biogas through anaerobic digestion of hog manure. This biogas is used to fuel a co-generation unit built and operated by SaskPower, producing electrical energy that is delivered into SaskPower’s electrical grid. The digester uses a portion of the thermal energy and a portion is sold to the hog facility. Their focus is to form partnerships with waste producers to build operating plants where the company brings the technology, capital and operations. The waste producer provides the site, contract, and can invest as a partner. Anaerobic digesters are well known and widely used. Advanced technology end-use applications can increase the economic value of biogas.
EFFECTS OF ENVIRONMENTAL FACTORS ON ODOR EMISSION FROM PIG MANURE
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Estimating gas emissions from a farm with an inverse-dispersion technique
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Nitrogen Concentration at Maturity—An Indicator of Nitrogen Status in Forage Maize
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Les exploitations d'élevage et la qualité de l'eau souterraine
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La plupart des personnes vivant dans les zones rurales du Manitoba dépendent principalement de l’eau souterraine pour s’approvisionner en eau. Afin de protéger et de conserver la qualité des sources d’eau souterraine, il est important que les producteurs agricoles exploitent leurs terres d’une manière responsable, en tant que gardien non seulement de la terre mais aussi de l’eau souterraine qui s’y trouve.
The Effects of Air Injection on the Pipeline Transport of Cattle and Pig Slurries
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(published in revised form 4 April 2005; published online 13 June 2005) A large-scale pipeline apparatus was used to investigate the effects of air injection on the properties of turbulent liquid flows in horizontal pipelines of different internal diameters (381, 508, 762 and 102 mm). The liquids included clean water, pig slurries with total solid concentrations up to 44% and dairy cattle slurries with total solid concentrations up to 55%. The superficial flow velocities were between 05 and 6 m/s and air injection rates ranged from 1 to 6% (v/v) at the point of injection.
Experimental data were collected in the form of corresponding values of flow rate and pressure gradient. These showed that air injection generally increased pressure gradients compared with the liquids flowing alone. However, inspection of the data indicated a tendency towards pressure gradient reductions if air is injected into cattle slurries containing more than 55% total solids.
It was shown that a simple linear model could represent the changes in pressure gradient brought about by air injection, and that this could provide a satisfactory procedure for the design of slurry pipelines with air injection.