Anaerobic decomposition of swine manure and ammonia generation in a deep pit
January 1, 1996
This article reports a laboratory study of swine manure decomposition in a deep pit. Distributions of solids, organic matter, pH, and ammonia in fresh swine manure after 12 h settling in a 1.2 m...
Evaluating the use of straw and other floating materials to control odor and gases from pig manure storage units
January 1, 1996
The use of various floating covers on commercial manure storage units to control odour and H2S emissions was evaluated and the management requirements to maintain the covers were identified. When...
An Integrated Index of Electrical Energy Use in Canadian Agriculture with Implications for Greenhouse Gas Emissions
January 1, 1996By J.A. Dyer
Electricity is fundamental to many farm chores. In this paper quantitative indices of electrical energy use were developed which reflect direct on-farm decisions for measures that farmers can adopt...
Reduction of odor and volatile substances in pig slurries by using pit additives
January 1, 1996
The effects of five commercial pit additive products on the release of odour nuisance and volatile compounds from swine manure were examined. The changes of pH, volatile fatty acids, total solids,...
Characteristics of phototrophic and non-phototrophic lagoons for swine manure
January 1, 1996
Odors are a major result of inadequately sized and mismanaged anaerobic lagoons. However, purple or pink colored lagoons, indicating the presence of phototrophic purple bacteria, are less likely to...
Air quality and emission measurement methodology at swine finishing buildings
January 1, 1996
Reliable measurements of air quality and emissions at large livestock buildings with inherently large spatial and temporal variations of pollutant concentrations are relatively difficult and...
Odor measurements from manure storages on Minnesota pig farms
January 1, 1996
Data collected from 30 pig manure stores in Minnesota, USA, shows a wide range of both odour dilution thresholds and hydrogen sulfide concentrations during moderate autumn weather conditions. A...
Environment - Water Usage / Conservation
A method to evaluate appropriate nipple drinker flow rates for pigs
January 1, 1995By Peter A. Phillips
A method was developed for measuring how different water flow rates from nipple drinkers affect the actual rates of water intake and spillage by pigs. A combination of video and electronic techniques...
A Simple Design and Operation for the Anaerobic Treatment of Highly Concentrated Swine Waste in the Tropics
January 1, 1995By P. Y. Yang
In order to develop a simple operation for an anaerobic treatment process for highly concentrated pig wastewater for small producers, a three-stage anaerobic treatment process was investigated. The...
Estimated seepage losses from established swine waste lagoons in the lower coastal plain of North Carolina
January 1, 1995By Rodney L. Huffman
Eleven well-established, swine waste lagoon systems in the lower coastal plain of North Carolina were examined for evidence of seepage losses to the superficial aquifer. The sites were selected to...
Edge-of-field losses of surface-applied animal manure
January 1, 1995
Poultry and swine production are important aspects of Arkansas agricultural economy. As these industries have grown, so have concderns regarding the proper utilization and disposal of the associated...
Simulated and measured effect of rectangular obstructions on carbon dioxide gas dispersion in a scaled swine building
January 1, 1995By S. J. Hoff
Gas dispersion from shallow manure storage pits was experimentally measured and mathematically modeled in a 1:6-scale ventilation chamber. The chamber represents a geometrically scaled model of a...
