Comparison of ammonia emissions from poultry houses based on diurnal integration vs. daily means of gas concentration and building ventilation rate

Yongxing Chen, Hongwei Xin, Hong Li, Timothy Shepherd, Morgan Hayes, John Stinn, Robert Burns, Richard S Gates, Hongmin Dong

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Quantification of aerial emissions from animal feeding operations (AFOs) requires the knowledge of both concentration of the constituent of interest and the ventilation rate (VR) through the emitting source. Daily emissions can be and are normally determined from diurnal integration of frequent measurements, referred to as the diurnal integration method (DIM), but is resource intensive. Alternatively, daily emission may be more economically estimated from daily means of concentration and VR, referred to as diurnal means method (DMM). In this study, DMM was compared with DIM in determining daily ammonia (NH 3) emissions from mechanically ventilated laying-hen, turkey and broiler houses under U.S. production conditions. Results show that deviations in daily NH3 emissions between DMM and DIM methods ranged from as small as < 3% (e.g., for medium age turkey under both cold and warm weather conditions) to as high as 98% (e.g., broiler houses in summer). Deviations were related with coefficient of variation (CV) of VR or NH3 concentration, although prediction of the deviation using CV of VR and/or NH3concentration alone will likely not produce reliable results. The study suggests that caution must be taken when using DMM to estimate daily NH3 emissions from poultry houses under typical US production conditions.

Original languageEnglish (US)
Title of host publicationASABE - 9th International Livestock Environment Symposium 2012, ILES 2012
Pages333-339
Number of pages7
StatePublished - Dec 1 2012
Event9th International Livestock Environment Symposium 2012, ILES 2012 - Valencia, Spain
Duration: Jul 8 2012Jul 12 2012

Publication series

NameASABE - 9th International Livestock Environment Symposium 2012, ILES 2012

Other

Other9th International Livestock Environment Symposium 2012, ILES 2012
CountrySpain
CityValencia
Period7/8/127/12/12

Keywords

  • Air emission
  • Measurement method
  • Poultry

ASJC Scopus subject areas

  • Animal Science and Zoology

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