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Comparison of Ammonia Emissions from Poultry Houses Based on Diurnal Integration vs. Daily Means of Gas Concentration and Building Ventilation Rate

文献类型： 会议论文

第一作者： Yongxing Chen

作者： Yongxing Chen 1 ; Hongwei Xin 2 ; Hong Li 3 ; Timothy Shepherd 4 ; Morgan Hayes 5 ; John Stinn 6 ; Robert Burns 7 ; Richard Gates 8 ; Hongmin Dong 1 ;

作者机构： 1.Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, 12 Southern Street of Zhongguancun, Beijing 100081, China

2.Department of Agricultural & Biosystems Engineering, Iowa State University, 3204 NSRIC, Iowa State University, Ames, Iowa 50011-3310, USA

3.Department of Animal and Food Sciences, University of Delaware. Newark, DE 19716, USA

4.Department of Agricultural & Biosystems Engineering, Iowa State University, 1242A NSRIC, Iowa State University, Ames, Iowa 50011-3310, USA

5.Agricultural & Biosystems Engineering and Animal Science, Iowa State University, 3105 NSRIC, Iowa State University, Ames, Iowa 50011-3310, United States

6.Department of Agricultural & Biosystems Engineering, Iowa State University, 3105 NSRIC, Iowa State University, Ames, Iowa 50011-3310, USA

7.The University of Tennessee Extension, 120 Morgan Hall, 2621 Morgan Circle, Knoxville, TN 37996, USA

8.Department of Agricultural & Biological Engineering, University of Illinois, 36QC AESB, MC-644, 1304 W. Pennsylvania Ave, Urbana IL 61801, USA

关键词： Poultry;air emission;measurement method

会议名称： International Livestock Environment Symposium

主办单位：

页码： 333-339

摘要： 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, referredto 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 indaily NH_3 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 NH_3 concentration, although prediction of the deviation using CVofVR and/or NH_3 concentration alone will likely not produce reliable results. The study suggests that caution must be taken when using DMM to estimate daily NH_3 emissions from poultry houses under typical US production conditions.

分类号： S82-532

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