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EMISSIONS OF METHANE AND NITROUS OXIDE DURING THE COMPOSTING OF LIQUID SWINE MANURE
Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan www.asabe.orgCitation: Pp. 267-273 in Air Pollution from Agricultural Operations III, Proceedings of the 12-15 October 2003 Conference (Research Triangle Park, North Carolina USA), Publication Date 12 October 2003. 701P1403.(doi:10.13031/2013.15518)
Authors: R. J. Fleming, and C. Wagner-Riddle
Keywords: Greenhouse gas, Slurry, Treatment
A liquid manure composting system has been tested at Ridgetown College, University of Guelph. Liquid manure was mixed with a carbon substrate (such as straw). Based on the success of the project, a larger scale unit was installed on a commercial swine farm. At both locations, concentrations of methane and nitrous oxide were measured during various stages of the compost process to determine if composting has advantages over traditional anaerobic storage in reducing greenhouse gas emissions. The fluxes of N2O and CH4 for all three trials were found to be quite variable. Over 10 weeks of composting the total CO2-equivalent emission from N2O and CH4 were 60% of the greenhouse gas emissions, estimated by default IPCC emission factors for stored liquid swine manure.
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