DOI: 10.1016/j.atmosenv.2014.10.039
Scopus记录号: 2-s2.0-84910026896
论文题名: Methane and nitrous oxide analyzer comparison and emissions from dairy freestall barns with manure flushing and scraping
作者: Cortus E ; L ; , Jacobson L ; D ; , Hetchler B ; P ; , Heber A ; J ; , Bogan B ; W
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2014
卷: 100 起始页码: 57
结束页码: 65
语种: 英语
英文关键词: Dairy
; Emissions
; Manure collection
; Manure handling
; Methane
; Nitrous oxide
Scopus关键词: Methane
; Particulate emissions
; Dairy freestall
; Nitrous oxide
; Dairies
; ammonia
; carbon dioxide
; hydrocarbon
; methane
; mineral
; molasses
; nitrous oxide
; protein
; atmospheric pollution
; concentration (composition)
; emission
; measurement method
; methane
; nitrous oxide
; ventilation
; air conditioning
; Article
; greenhouse gas
; humidity
; lung ventilation
; manure
; nitrous oxide emission
; temperature
; water vapor
; United States
; Wisconsin
Scopus学科分类: Environmental Science: Water Science and Technology
; Earth and Planetary Sciences: Earth-Surface Processes
; Environmental Science: Environmental Chemistry
英文摘要: Continuous methane (CH4) and nitrous oxide (N2O) emission measurements were conducted at two crossflow-ventilated dairy freestall barns located in the state of Wisconsin, USA during a 19-month period from 2008 to 2010. The two cross-flow mechanically ventilated buildings (275 and 375 cow capacities) were evaluated in the National Air Emissions Monitoring Study. In September of 2008, the barns' manure collection systems were changed from flushing open gutter using manure basin effluent to a tractor scrape. A photoacoustic multi-gas analyzer (PAMGA) and a direct methane/non-methane hydrocarbon analyzer (GC-FID) provided side-by-side measurements of methane (CH4) for 13 months. The PAMGA also measured nitrous oxide (N2O), and a side-by-side comparison was performed with a gas-filter correlation analyzer (GFC) for six months. Barn ventilation rates were measured by recording run times of the 127-cm diameter exhaust fans. All 125 belt-driven exhaust fans were identical, and in situ airflow measurements using the Fan Assessment Numeration System (FANS) were conducted once at the beginning and twice during the test. Daily CH4 and N2O emission rates were calculated over approximately 19 and 6 month periods respectively, on per barn, head, animal unit, floor area space and barn capacity bases. The differences between the analyzers' concentration measurements were compared in conjunction with water vapor and other gases. The analyzer type had a significant impact on the average CH4 emission rate (p<0.001) and the average N2O emission rate (p<0.05). Based on the CH4 measurements with the GC-FID, average daily mean CH4 emissions were approximately 290gAU-1d-1 (390gcow-1d-1) with very limited seasonal effects. Little variation was observed in CH4 emission rates before and after the change in manure collection method, suggesting that most of the CH4 emissions were enteric losses directly from the cows. The average daily mean N2O emission rates based on the GFC were very low, with an approximate rate of only 690mgAU-1d-1 (970mgcow-1d-1). The change in manure collection had no apparent effect on N2O emission. © 2014 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/80597
Appears in Collections: 气候变化事实与影响
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作者单位: Agricultural and Biosystems Engineering, South Dakota State University, Box 2120, Brookings, SD, United States; Bioproducts and Biosystems Engineering, University of Minnesota, 1390 Eckles Ave., St. Paul, MN, United States; Agricultural and Biological Engineering, Purdue University, 225 S. University St., West Lafayette, IN, United States
Recommended Citation:
Cortus E,L,, Jacobson L,et al. Methane and nitrous oxide analyzer comparison and emissions from dairy freestall barns with manure flushing and scraping[J]. Atmospheric Environment,2014-01-01,100