Evaluating phosphorus loading from repeated manure applications to two Saskatchewan soils
January 1, 2008
An understanding of the impact of repeated manure additions on soil phosphorus (P) is needed to determine appropriate manure application rates for prairie soils and manure sources. The objective of...
Effect of the presence of the antimicrobial tylosin in swine waste on anaerobic treatment
January 1, 2008
An anaerobic sequencing batch reactor (ASBR), seeded with a biomass inoculum that
previously had not been exposed to the macrolide antimicrobial tylosin (mixture of Tylosin
A, B, C, and D), was...
Greenhouse gas emission reduction and environmental quality improvement from implementation of aerobic waste treatment systems in swine farms
January 1, 2008By Vanotti
Trading of greenhouse gas (GHG) emission reductions is an attractive approach to help producers implement cleaner treatment technologies to replace current anaerobic lagoons. Our objectives were to...
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...
