The Effect of Aeration on Phosphorus Removal in Swine Manure under Different Temperatures
January 1, 2001By JUN ZHU
The effect of aeration on phosphorus removal from swine manure under five temperature regimes, 5, 10, 15, 20, and 25 degrees C, was investigated. The effects of pH and volatile fatty acids (VFAs)...
Dietary adipic acid reduces ammonia emission from swine excreta
January 1, 2001
Adipic acid is only partially catabolized when it is fed to animals, and a portion of it is excreted in urine. The excreted portion may lower urinary pH and, as a result, ammonia emission. The...
Nitrogen mineralization and uptake by ryegrass in a clay loam soil amended with composts or liquid pig manure
January 1, 2001By X. M. Yang
Although composted liquid pig manure is increasingly being applied to agricultural soils, little is known about its impacts on N dynamics (mineralization, denitrification, immobilization, and plant...
Ammonia volatilization from marsh-pond-marsh constructed wetlands treating swine wastewater
January 1, 2001
Ammonia (NH3) volatilization is an undesirable mechanism for the removal of nitrogen (N) from wastewater treatment wetlands. To minimize the potential for NH3 volatilization, it is important to...
Laboratory and In-Situ Reductions of Soluble Phosphorous in Swine Waste Slurries
January 1, 2001By Robert T. Burns
Laboratory and field experiments were conducted using magnesium chloride (MgCl2) to force the precipitation of struvite (MgNH4PO4.6H2O) and reduce the concentration of soluble phosphorous (SP) in...
Hydrogen sulfide assessment in shallow-pit swine housing and outside manure storage
January 1, 2001
In Saskatchewan, some recent incidents have lead us to believe that certain manure management activities can potentially release high concentrations of H2S into the atmosphere of shallow-pit barns....
Effects of feedstock pH, initial CO addition, and total solids content on the thermochemical conversion process of swine manure
January 1, 2001By Bingjun He
The effects of feedstock pH, ratio of initial carbon monoxide to volatile solids (CO/VS), and total solids content of the feedstock on the thermochemical conversion process of swine manure were...
Biological anoxic/aerobic treatment of swine waste for reduction of organic carbon, nitrogen, and odor
January 1, 2001By Caye M. Drapcho
A continuous-flow anoxic/aerobic (A/A) biological treatment system designed to treat swine wastewater was investigated. Laboratory studies were conducted to determine the heterotrophic bacteria...
Swine wastewater treatment using attached-growth and suspended-growth two stage sequencing batch reactors with real-time control
January 1, 2001
Two two-stage sequencing batch reactors (TSSBR), one attached-growth and one suspended-growth, were operated under three levels of wastewater concentration (approx. 4,000, 2,000 and 500 TOC mg/L),...
Phosphorus transformations in swine manure during continuous and intermittent aeration processes
January 1, 2001
The objective of the study presented here was to determine the transformation of phosphorus (P) between different forms in the process of intermittent and continuous aeration. According to this...
