Reducing phosphorus runoff from swine manure with dietary phytase and aluminum chloride
January 1, 2004
Phosphorus (P) runoff from fields fertilized with swine (Sus scrofa) manure has been implicated in eutrophication. Dietary modification and manure amendments have been identified as best management...
An assessment of nitrogen-based manure application rates on 39 U.S. swine operations
January 1, 2004
Water quality concerns and revised regulations are changing how confined animal feeding operations manage manure. Devising acceptable and feasible changes in manure practices requires a full...
Use of floating vegetation to remove nutrients from swine lagoon wastewater
January 1, 2004
Methods are needed to remove nutrients contained within wastewater lagoons. Potential exists for nutrient removal directly from lagoons if vegetation can be grown on floating mats in the lagoon and...
Additives to reduce phosphorus excretion and phosphorus solubility in poultry and swine manure
January 1, 2004
In the past 20 years, scientists have realised that environmental contamination by non-point source nutrients is a significant problem and its control is not easily managed. Manure phosphorus was...
Effects of duration and intensity of aeration on solids decomposition in pig slurry for odour control
January 1, 2004
A 30 day laboratory scale experiment was carried out using three different aeration rates, i.e. +35 mV oxidation reduction potential (ORP: standard hydrogen electrode), 1·0, and 3·0 mg[O2]...
Effects of manure removal strategies on odor and gas emissions from swine finishing
January 1, 2004
Odor, ammonia (NH3) and hydrogen sulfide (H2S) concentrations and emission rates were measured in two small rooms of finishing pigs with different manure removal strategies. The strategies included...
Effect of aluminum chloride and dietary phytase on relative ammonia losses from swine manure
January 1, 2004
Ammonia (NH3) losses from swine manure contribute to odor problems, decrease animal productivity, and increase the risk of acid rain deposition. This study was conducted to determine whether aluminum...
Synthetic covers for emissions control from earthen embanked swine lagoons – Part I: Positive pressure lagoon cover
January 1, 2004
An air-supported cover of 0.35-mm vinyl coated fabric was installed on a 29- x 39-m earthen-embanked swine lagoon. At a normal operating pressure of 80 to 100 Pa, leakage rate (air supplied to keep...
Effects of operating temperature and supplemental nutrients in a pilot-scale agricultural biofilter
January 1, 2004By O.G. Clark
In this study, the objective was to determine if different operating temperatures and/or the addition of supplemental inorganic nutrients affected the odour removal capacity of two pilot-scale,...
Emissions of N2O and CH4 during the composting of liquid swine manure
January 1, 2004By C. Wagner-Riddle
Composted organic wastes have been shown to reduce emissions of N2O and CH4, but little is known about the release of these gases during the composting process. This research examined the emissions...
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...
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...
