A system for manure treatment and phosphorous control on small dairy and swine farms
January 1, 2004By Victor Johnson
Focus on animal waste treatment for odor and phosphorus control has small farmers in a quandary. Sophisticated systems for manure dewatering and treatment involving centrifuges, screw presses, belt...
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...
Phosphorus Composition of Manure from Swine Fed Low-Phytate Grains: Evidence for Hydrolysis in the Animal
January 1, 2004By April B. Leytem
Including low-phytic-acid grains in swine diets can reduce P concentrations in manure, but the influence on manure P composition is relatively unknown. To address this we analyzed manure from swine...
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...
Abatement of ammonia emissions from swine lagoons using polymer-enhanced solid-liquid separation
January 1, 2004By Ariel A. Szög
A study was conducted to determine the effects of solid-liquid separation of liquid swine manure on ammonia emissions from lagoons. This determination was done at full-scale in two contiguous swine...
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]...
Characterization of VOCs and particulates from swine finishing facilities
January 1, 2004By Wendy Powers
Emissions from animal feeding operations have been a prominent topic in Iowa for a number of years,particularly during 2002. To address the issue a study was initiated to determine 1) if phase of...
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...
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...
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...
