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2006

Environmental Sciences

Agricultural and Biosystems Engineering Publications

Ammonia

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Quality Assured Measurements Of Animal Building Emissions: Gas Concentrations, Albert J. Heber, Jiqin Ni, Teng T. Lim, Pei-Chun Tao, Amy M. Millmier, Jacek A. Koziel, David B. Beasley, Steven J. Hoff, Richard E. Nicolai, Larry D. Jacobson, Yuanhui Zhang Jan 2006

Quality Assured Measurements Of Animal Building Emissions: Gas Concentrations, Albert J. Heber, Jiqin Ni, Teng T. Lim, Pei-Chun Tao, Amy M. Millmier, Jacek A. Koziel, David B. Beasley, Steven J. Hoff, Richard E. Nicolai, Larry D. Jacobson, Yuanhui Zhang

Agricultural and Biosystems Engineering Publications

Comprehensive field studies were initiated in 2002 to measure emissions of ammonia (NH3), hydrogen sulfide (H2S), carbon dioxide (CO2), methane (CH4), nonmethane hydrocarbons (NMHC), particulate matter <10 µm in diameter, and total suspended particulate from swine and poultry production buildings in the United States.

This paper focuses on the quasicontinuous gas concentration measurement at multiple locations among paired barns in seven states. Documented principles, used in air pollution monitoring at industrial sources, were applied in developing quality assurance (QA) project plans for these studies. Air was sampled from multiple locations with each gas analyzed with one high quality commercial gas analyzer that was located in an environmentally controlled on-farm instrument shelter. A nominal 4 L/min gas sampling ...


Ammonia And Hydrogen Sulphide Flux And Dry Deposition Velocity Estimates Using Vertical Gradient Method At A Commercial Beef Cattle Feedlot, Bok-Haeng Baek, Richard Todd, N. Andy Cole, Jacek A. Koziel Jan 2006

Ammonia And Hydrogen Sulphide Flux And Dry Deposition Velocity Estimates Using Vertical Gradient Method At A Commercial Beef Cattle Feedlot, Bok-Haeng Baek, Richard Todd, N. Andy Cole, Jacek A. Koziel

Agricultural and Biosystems Engineering Publications

Ammonia and hydrogen sulphide flux and dry deposition velocity were estimated using micrometeorological vertical gradient flux method at a commercial cattle feedyard of approximately 50,000 head of beef cattle and average 14.4 m²/head (150 ft²/head) stocking density. Ammonia-N and H2S-S loss had general diurnal patterns with the highest fluxes in daytime and lowest fluxes in nighttime that correlated to temperature changes and active evaporation process during daytime. The highest average deposition velocities also occurred during daytime with unstable atmospheric conditions and the lowest during nighttime with very stable conditions. There are exponential relationship between ...


A Preliminary Review Of Gas-To-Particle Conversion Monitoring And Modelling Efforts In The Usa, Bok-Haeng Baek, Jacek A. Koziel, Viney P. Aneja Jan 2006

A Preliminary Review Of Gas-To-Particle Conversion Monitoring And Modelling Efforts In The Usa, Bok-Haeng Baek, Jacek A. Koziel, Viney P. Aneja

Agricultural and Biosystems Engineering Publications

Ammonia and inorganic acid gases emitted from livestock and poultry operations, manure treatment, handling and application can affect air quality by the formation of secondary fine particles. The process of gas-to-particle conversion (GTPC) of relatively short-lived gaseous ammonia to more persistent fine particles can affect local and regional air quality far away from the agricultural sources. This study focused on understanding the phenomenon and related problems of the GTPC process between ammonia, acid gases and fine particles in the atmosphere. We discuss the knowledge of PM measurement technologies with their uncertainties and introduce the most recent aerosol models available developed ...