Covered anaerobic lagoon system for swine waste treatment and energy recovery
January 1, 1998By Jiayang Cheng
A covered anaerobic lagoon system for swine manure management has been evaluated for its performance. The system consists of a covered anaerobic lagoon for primary treatment and a conventional lagoon...
Application of Mixed and Aerated Pond for Nitrification and Denitrification of Flushed Swine Manure
January 1, 1998By Philip Westerman
A nitrification/denitrification system for flushed swine manure was evaluated for treating manure from 3000 finishing pigs. The system consisted of a pond with a mixing zone for denitrification...
Experiences with a biofilter on a slatted floor hog barn
January 1, 1998
A biofilter was installed for the removal of odorous gases from the pit ventilation air of a slatted floor pig finishing barn and was studied over a 2 year period. The biofilter was effective in...
Swine effluent irrigation rate and timing effects on bermudagrass growth, nitrogen and phosphorus utilization, and residual soil nitrogen
January 1, 1998By A. Adeli
Maximizing utilization of effluent nutrients by forage grasses requires a better understanding of irrigation rate and timing effects. This study was conducted in 1998 and 1999 on a Vaiden silty clay...
Modeling ammonia volatilization from surface-applied swine effluent
January 1, 1998By D. L. Nofziger
Ammonia volatilization is an important issue in agricultural production and environmental protection. Experimental methods and numerical models exist to estimate the rate and amount of ammonia...
Evaluation of vegetative filter strips for swine lagoon wastewater
January 1, 1998By David T. Hill
Vegetative filter strips (VFS), on slopes of 5 and 11%, were used as a means of treating wastewater effluent from the second cell of a swine waste anaerobic lagoon system. Wastewater samples from...
Seepage losses and nitrogen export from swine-waste lagoons: a water balance study
January 1, 1998
Seepage losses from animal-waste lagoons could affect ground water quality. Water balance methods were used to study seepage and nitrogen export from three swine-waste lagoons in southwestern...
Distribution of ammonium-N in the water-soil interface of a surface-flow constructed wetland for swine wastewater treatment
January 1, 1998
Most livestock wastewaters treated in constructed wetlands are typically rich in ammonium N. The objective of this study was to evaluate the soil-water ammonium distribution and the diffusive flux...
Denitrification following land application of swine waste to bermudagrass pasture
January 1, 1998By D. G. Sullivan
Nitrogen (N) losses following land-applied animal wastes present an environmental and economical dilemma for producers. Gaseous N losses from pastureland contribute to global warming, ozone...
Environment - Air
Soil infiltration and wetland microcosm treatment of liquid swine manure
January 1, 1998
Management systems are needed to minimize water quality concerns associated with liquid swine manure from large swine production facilities. Experiments were conducted to investigate the removal of...
Rates and controls on denitrification in an agricultural soil fertilized with liquid lagoonal swine waste
January 1, 1998
Under laboratory conditions, we studied rates and controls on denitrification and denitrification potential (denitrifying enzyme activity, DEA) in agricultural soils in the southeastern United States...
Antimicrobial residues in animal waste and water resources proximal to large-scale swine and poultry feeding operations
January 1, 1998
Expansion and intensification of large-scale animal feeding operations (AFOs) in the United States has resulted in concern about environmental contamination and its potential public health impacts....
