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:

Author(s): IGER, Institute of Grassland & Environmental Research
Publication Date: January 1, 1995
Reference: Research to Prevent Pollution. IGER, Silsoe Research Institute.
Country: United Kingdom


Continuous aerobic treatment can be a mean to stabilize the nitrogen compounds in the manure or create condition for denitrification and removal of N under the form of di-nitrogen gas (N2). Aeration treatment of 3 days of less results in stabilization of the nitrogen by bounding up in the organic form. Nitrification will occur after 3 days or more and most of all the ammoniacal nitrogen (NH3, NH4) is than converted to nitrite/nitrate (NO2/NO3). With low aeration rates or with period where the aeration is stopped, denitrification will occur and up to 70% of the original N in the manure can be lost through N2 and N2O gas emissions. When the aeration is done at high temperature (50-60 C, thermophilic treatment), nitrogen losses can be done under the form of ammonia as nitrification is inhibited.

Aeration can be a mean to stabilize the nitrogen compounds (lower the possible ammonia emissions)to slower release organic forms. For longer aeration, denitrification can remove N and help in the situation where N is in excess. However, some manure nutrients other than N can than be the limiting factor.

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