Field sampling method for quantifying odorants in humid environments
January 1, 2008By Steven Trabue
Most air quality studies in agricultural environments use thermal desorption analysis for quantifying semivolatile organic compounds (SVOCs) associated with odor. The objective of this study was to...
Process model for ammonia volatilization from anaerobic swine lagoons incorporating varying wind speeds and gas bubbling
January 1, 2008By Kyoung S. Ro
Ammonia volatilization from treatment lagoons varies widely with the total ammonia concentration, pH, temperature, suspended solids, atmospheric ammonia concentration above the water surface, and...
Effects of cycle-frequency and temperature on the performance of anaerobic sequencing batch reactors (ASBRs) treating swine waste
January 1, 2008By P.M. Ndegwa Biological Systems Engineering Department
Anaerobic digestion of animal waste is a technically viable process for the abatement of adverse environmental impacts caused by animal wastes; however, widespread acceptance has been plagued by poor...
Nitrous oxide emissions and soil mineral nitrogen status following application of hog slurry and inorganic fertilisers to acidic soils under forage grass
January 1, 2008By Mkhabela M. S
Field application of livestock slurry often results in higher nitrous oxide (N2O) emissions than inorganic fertiliser, because slurry contains large amounts of available N and C, and when applied it...
Greenhouse gas emissions from two soils receiving nitrogen fertilizer and swine manure slurry
January 1, 2008
The interactive effects of soil texture and type of N fertility (i.e., manure vs. commercial N fertilizer) on N2O and CH4 emissions have not been well established. This study was conducted to assess...
Modeling hydrogen sulfide emissions across the gas-liquid interface of an anaerobic swine waste treatment storage system
January 1, 2008By Jessica Blunden Viney P. Aneja Department of Marine
Hydrogen sulfide (H2S) is a colorless gas emitted during decomposition of hog manure that produces an offensive "rotten egg" smell and is considered a toxic manure gas. In the southeastern...
Modeling studies of ammonia dispersion and dry deposition at some hog farms in North Carolina
January 1, 2008By Bajwa Kanwardeep S.
A modeling study was conducted on dispersion and dry deposition of ammonia taking one hog farm as a unit. The ammonia emissions used in this study were measured under our OPEN (Odor, Pathogens, and...
Environmental Aspects of Ethical Animal Production
January 1, 2008
Livestock and poultry producers face a number of challenges including pressure from the public to be good environmental stewards and adopt welfare-friendly practices. In response, producers often...
Oxidization-reduction potential and pH for optimization of nitrogen removal in a twice-fed sequencing batch reactor treating pig slurry
January 1, 2008By and Yingxu Chen|Weixiang Wu|Zhiying Han
Changes in oxidization-reduction potential (ORP) and pH along with ammonia nitrogen, nitrite nitrogen and nitrate nitrogen in a twice-fed sequencing batch reactor (SBR) treating pig slurry were...
The impact of swine lagoon seepage on shallow groundwater quality: Groundwater remediation through lagoon closure and pumping
January 1, 2008By Jon M. Hathaway
Anaerobic lagoons have been used extensively since about 1960 to temporarily store and partially treat livestock waste from concentrated animal production facilities. An earlier study characterized...
Air pollution and odor in communities near industrial swine operations
January 1, 2008
BACKGROUND: Odors can affect health and quality of life. Industrialized animal agriculture creates odorant compounds that are components of a mixture of agents that could trigger symptoms reported by...
Environment - Air
Particulates, Ammonium Nitrate, and Ammonium Sulfate: Effects on Air Quality in Rural Iowa
December 26, 2007By R. L. Pfeiffer
Air quality has many components, one of which is PM2.5 and ammonium nitrate and ammonium sulfate are reported to be two of the major components. Swine confinement facilities generate significant...
