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...
Quantification of odors and odorants from swine operations in North Carolina
January 1, 2001
A total of 331 different volatile organic compounds (VOCs) and fixed gases from swine facilities in North Carolina, USA, were identified by gas chromatography (GC) and mass spectrometry. Of these,...
Occurrence and diversity of tetracycline resistance genes in lagoons and groundwater underlying two swine production facilities
January 1, 2001By R.I. Aminov
In this study, we used PCR typing methods to assess the presence of tetracycline resistance determinants conferring ribosomal protection in waste lagoons and in groundwater underlying two swine...
Gaseous nitrogen emissions and forage nitrogen uptake on soils fertilized with raw and treated swine manure
January 1, 2001
Treatments to reduce solids content in liquid manure have been developed, but little information is available on gaseous N emissions and plant N uptake after application of treated liquid swine...
