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This article in JEQ

  1. Vol. 37 No. 6, p. 2001-2011
    Received: July 22, 2007

    * Corresponding author(s): jiqin@purdue.edu
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Methane and Carbon Dioxide Emission from Two Pig Finishing Barns

  1. Ji-Qin Ni *a,
  2. Albert J. Hebera,
  3. Teng Teeh Lima,
  4. Pei Chun Taoa and
  5. Amy M. Schmidtb
  1. a Dep. of Agric. & Biological Engineering, Purdue Univ., 225 S. University St., West Lafayette, IN 47907
    b 229 Agric. Engineering Bldg., Univ. of Missouri, Columbia, MO 65211. Journal Contribution no. 2007-18261 of Purdue Univ. Agricultural Research Programs. The primary version of the paper was presented at the Livestock Environmental Initiative Conference, February 7–8, 2005, Toronto, Canada


Agricultural activities are an important source of greenhouse gases. However, comprehensive, long-term, and high-quality measurement data of these gases are lacking. This article presents a field study of CH4 and CO2 emission from two 1100-head mechanically ventilated pig (Sus scrofa) finishing barns (B1 and B2) with shallow manure flushing systems and propane space heaters from August 2002 to July 2003 in northern Missouri. Barn 2 was treated with soybean oil sprinkling, misting essential oils, and misting essential oils with water to reduce air pollutant emissions. Only days with CDFB (complete-data-full-barn), defined as >80% of valid data during a day with >80% pigs in the barns, were used. The CH4 average daily mean (ADM) emission rates were 36.2 ± 2.0 g/d AU (ADM ± 95% confidence interval; animal unit = 500 kg live mass) from B1 (CDFB days = 134) and 28.8 ± 1.8 g/d AU from B2 (CDFB days = 131). The CO2 ADM emission rates were 17.5 ± 0.8 kg/d AU from B1 (CDFB days = 146) and 14.2 ± 0.6 kg/d AU from B2 (CDFB days = 137). The treated barn reduced CH4 emission by 20% (P < 0.01) and CO2 emission by 19% (P < 0.01). The CH4 and CO2 released from the flushing lagoon effluent were equivalent to 9.8 and 4.1% of the CDFB CH4 and CO2 emissions, respectively. The emission data were compared with the literature, and the characteristics of CH4 and CO2 concentrations and emissions were discussed.

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