Fugitive methane emissions from an agricultural biodigester

Abstract The use of agricultural biodigesters provides a strategy for reducing greenhouse gas (GHG) emissions while generating energy. The GHG reduction associated with a biodigester will be affected by fugitive emissions from the facility. The objective of this study was to measure fugitive methane (CH 4 ) emissions from a Canadian biodigester. The facility uses anaerobic digestion to produce biogas from cattle manure and other organic feedstock, which is burnt to generate electricity (1 MW capacity) and heat. An inverse dispersion technique was used to calculate emissions. Fugitive emissions were related to the operating state of the biodigester, and over four seasonal campaigns the emission rate averaged 3.2, 0.8, and 26.6 kg CH 4 hr −1 for normal operations, maintenance, and flaring periods, respectively. During normal operations the average fugitive emission rate corresponded to 3.1% of the CH 4 gas production rate.

[1]  Larry W. Kostiuk,et al.  Efficiencies of low-momentum jet diffusion flames in crosswinds , 2000 .

[2]  R. Payne,et al.  Combustion efficiency of flares. Report for October 1980-February 1984 , 1985 .

[3]  B. Walker,et al.  Rural Industries Research and Development Corporation , 2011 .

[4]  R. Desjardins,et al.  Methane and ammonia emissions from a beef feedlot in western Canada for a twelve-day period in the fall , 2008 .

[5]  F. Kelliher,et al.  Methane emissions from dairy cows: Comparing open-path laser measurements to profile-based techniques , 2005 .

[6]  Lowry A. Harper,et al.  Estimating gas emissions from a farm with an inverse-dispersion technique , 2005 .

[7]  Lowry A. Harper,et al.  Deducing Ground-to-Air Emissions from Observed Trace Gas Concentrations: A Field Trial with Wind Disturbance , 2004 .

[8]  John D. Wilson,et al.  The effect of biofuel production on swine farm methane and ammonia emissions. , 2010, Journal of environmental quality.

[9]  T. Flesch,et al.  An approach for measuring methane emissions from whole farms. , 2006, Journal of environmental quality.

[10]  M. Sanz,et al.  Use of an inverse dispersion technique for estimating ammonia emission from surface-applied slurry. , 2010 .

[11]  John D. Wilson,et al.  Review of Lagrangian stochastic models for trajectories in the turbulent atmosphere , 1996 .

[12]  D. Wilson,et al.  A FUEL STRIPPING MECHANISM FOR WAKE-STABILIZED JET DIFFUSION FLAMES IN CROSSFLOW , 2001 .

[13]  T. Flesch,et al.  Ammonia emissions from dairy production in Wisconsin. , 2009, Journal of dairy science.

[14]  R. Desjardins,et al.  Assessment of the uncertainty of using an inverse-dispersion technique to measure methane emissions from animals in a barn and in a small pen , 2010 .

[15]  Thomas K. Flesch,et al.  Ammonia emission from dairy cow manure stored in a lagoon over summer , 2008 .