Mathematical Modeling of Phosphorus Losses from Land Application of Hog and Cattle Manure
January 1, 1995By R. F. Grant
Mathematical models may provide a means to estimate phosphorus (P) losses from land application of manure. Phosphorus losses typically occur during brief episodes of runoff and erosion. Models must...
Evaluation of nitrogen isotopes as indicators of nitrate contamination sources in an agricultural watershed
January 1, 1995
Determining the relative contributions of nitrate contamination in agricultural watersheds characterized by applications of both mineral and animal waste nitrogen to fields is important in...
Effects of swine lagoon effluent relative to commercial fertilizer applications on warm-season forage nutritive value
January 1, 1995By A. Adeli
Two field experiments were conducted to evaluate the effects of comparable rates of swine lagoon effluent and commercial fertilizer at different harvest dates on dry matter yield and nutritive value...
Removal of nitrogen from swine manure wastewaters by ammonia stripping
January 1, 1995
Laboratory-scale experiments were undertaken to investigate aeration and air stripping as methods for removing ammonia from swine waste waters with high nitrogen contents. The effects of temperature,...
Removal of airborne swine dust by electrostatic precipitation
January 1, 1995
An electrostatic precipitator used in conjunction with a recirculation duct was developed to remove airborne pig dust from an environmental chamber. The collection efficiency of the precipitator was...
Potential reduction of struvite formation from anaerobic swine lagoon effluent by treatment in constructed wetlands
January 1, 1994By Dennis M. Sievers
Effluents from both cells of a two-cell anaerobic lagoon system treating flushed swine waste from the University of Missouri Swine Farm were treated in parallel constructed wetlands - submerged flow...
Headspace analysis of malodorous compounds from swine wastewater under aerobic treatment
January 1, 1994By A. Chen
Static headspace sampling and gas chromatograph (GC) analyses were used to monitor the concentration of malodorous compounds (volatile fatty acids (VFA), phenol, p-cresol, indole, and skatole)...
Effects of swine lagoon effluent and commercial fertilizer applications on phosphorus status of an acid and alkaline soil
January 1, 1994By Ardeshir Adeli
Two separate field experiments were conducted in Brooksville, Mississippi to evaluate the effects of swine lagoon effluent relative to inorganic fertilizer at equivalent rates on phosphorus (P)...
Denitrification in a Coastal Plain Riparian Zone Contiguous to a Heavily Loaded Swine Wastewater Spray Field
January 1, 1994
Riparian zones are recognized worldwide as important landscape features that are able to buffer streams from pollutants, particularly nitrogen. The objectives of this experiment were to 1) assess the...
Swine lagoon effluent as a source of nitrogen and phosphorus for summer forage grasses
January 1, 1994
Efficient crop utilization of N and P derived from anaerobic swine (Sus scrofa domesticus) lagoon effluent is critical to minimizing offsite nutrient movement. The objective of this study was to...
Removal of ammonia and odors from contaminated air in animal houses by a ferroelectric plasma reactor
January 1, 1994
The objective of this work was to develop an electric air-cleaning system for animal houses. An a.c.-powered ferroelectric packed-bed plasma reactor was tested to destroy ammonia and odours in the...
Gaseous nitrogen emissions from anaerobic swine lagoons: ammonia, nitrous oxide, and dinitrogen gas
January 1, 1994
Seventy-five percent of swine (Sus scrofa) production systems in North America use anaerobic or liquid-slurry systems for waste holding or disposal. Accurate emissions data and emission factors are...
