Enzymatic hydrolysis of organic phosphorus in swine manure and soil
January 1, 2004By Zhongqi He
Organic phosphorus (Po) exists in many chemical forms that differ in their susceptibility to hydrolysis and, therefore, bioavailability to plants and microorganisms. Identification and quantification...
Ammonia emissions from swine houses in the Southeastern United States
January 1, 2004
Ammonia (NH3) from confined animal feeding operations is emitted from several sources including lagoons, field applications, and houses. This paper presents studies that were conducted to evaluate...
Enzyme-linked immunosorbent assay for ultratrace determination of antibiotics in aqueous samples
January 1, 2004By K. Kumar
Two commercially available enzyme-linked immunosorbent assay (ELISA) kits that are commonly used for tylosin or tetracycline residues in meat and milk were adapted for ultratrace analysis of these...
Dust and odor emissions from tunnel ventilated swine buildings in North Carolina and comparison of different odor evaluation methods
January 1, 2004
Tunnel ventilation of swine buildings conveys odourous dust and gases out of the production buildings. Measurement of dust and odour levels and other environmental parameters is necessary for...
Seepage evaluation of older swine lagoons in North Carolina
January 1, 2004By Ronald L. Huffman
Thirty-four swine waste lagoon systems in North Carolina were examined for evidence of seepage losses to the shallow groundwater. All were constructed prior to the state's January 1993 adoption of...
Excretion of major odor-causing and acidifying compounds in response to dietary supplementation of chicory inulin in growing pigs
January 1, 2004
The excretion of major odor-causing and acidifying compounds in response to dietary supplementation of chicory inulin extract was investigated with six Yorkshire barrows, with an average initial BW...
Total and water-soluble phosphorus excretion from swine fed low-phytate soybeans
January 1, 2004
A study was conducted to evaluate the impact of feeding soybean meal (SBM) from low-phytate (LP) or traditional phytate (TP) soybeans on performance and excretions from growing swine. Ninety-six...
Kinetics of ammonia removal in a pilot-scale biofilter
January 1, 2004
A mobile, skid-mounted biofilter was designed and built to determine the kinetics of ammonia oxidation at a modern 2400-sow farrow-to-wean unit. The biofilter system consisted of a variable-speed...
Soil Column Testing for Nutrient Reduction in Partially Treated Swine Manure
January 1, 2004By Jian Xiao
Liquid swine manure, pre-treated by physical and chemical methods to precipitate phosphorus and remove suspended solids, was applied to a series of soil columns. The soil columns simulated proposed...
Synthetic covers for emissions control from earthen embanked swine lagoons – part II: Negative pressure lagoon cover
January 1, 2004
One of the significant odor sources on swine farms is manure storage. This study investigated reducing odor and gas emissions from a 29- x 39-m anaerobic swine lagoon by capturing gases beneath a...
