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...
Eugenol stimulates lactate accumulation yet inhibits volatile fatty acid production and eliminates coliform bacteria in cattle and swine waste
January 1, 2004
Aim: To determine how eugenol affects fermentation parameters and faecal coliforms in cattle and swine waste slurries stored anaerobically. Methods and Results: Waste slurries (faeces : urine :...
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...
