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...
Geotextile fabric-straw manure storage covers for odor, hydrogen sulfide, and ammonia control
January 1, 2001
Manure storages are a major odour source. Straw and/or geotextile fabric covers can be used to reduce these odour emissions. Thirty-eight 160-litre (42-gal) open-topped PVC pipes (columns) containing...
Effects of alum and aluminum chloride on phosphorus runoff from swine manure
January 1, 2001
Phosphorus (P) runoff from fields fertilized with swine (Sus scrofa domesticus) manure may contribute to eutrophication. The objective of this study was to evaluate the effect of aluminum sulfate...
Odor measurements for manure spreading using a subsurface deposition applicator
January 1, 2001
Odour emissions during manure spreading events have become a source of concern, particularly where farms are located nearby urban areas. The objective of the present study was to compare odour...
Raising pH by low-level aeration for soluble phosphorus removal of swine manure
January 1, 2001By JUN ZHU
Soluble phosphorus (P) removal by increasing swine manure pH was investigated in this study. Sodium hydroxide (1 M) was used to increase the manure pH from 6.5 to 9. Two aeration treatments...
Effect of carvacrol and thymol on odor emissions from livestock wastes
January 1, 2001
A majority of the beef cattle and swine in the United States is produced in confined facilities. This generates significant environmental pollutants from the waste produced, including global warming...
Ammonia volatilization and soil nitrogen dynamics following fall application of pig slurry on canola crop residues
January 1, 2001By Philippe Rochette
Land application of liquid manures is a major source of atmospheric ammonia. The presence of crop residues on the soil surface usually increases emissions by retarding slurry infiltration, whereas...
