Treatment of pig slurry using the pump-stirred aerator
January 1, 1991By D. W. Williams
An experimental aeration system, called a pump-stirred aerator (PSA) was tested. The PSA consisted of an 11 kw centrifugal pump circulating liquid to and from a 10 msuperscript 3 tank and injecting...
Spring runoff and drainage N and P losses from hog-manured corn
January 1, 1991By G. Gangbazo
A two-year study was conducted to assess the effect of hog manure on the losses of nitrogen and phosphorus in runoff and drainage from grain-corn (Zea mays L.) plots, and the importance of spring...
Ammonia emissions from a large swine production complex
January 1, 1990
Observations were made of a 1000-sow pig complex in Virginia, USA, to determine atmospheric ammonia loadings. Comparisons were made with similar data from the Netherlands, where ammonia release was...
Electrostatic precipitation dust removal system for swine housing
January 1, 1990
The research objectives were to develop and evaluate a practical dust removal method for livestock housing using ionization and electrostatic precipitation. Prototype testing was conducted in an...
Measurement and impact of agricultural odors from a large scale swine production farm
January 1, 1990
With the move on a nationwide scale to greater centralization and specialization of swine production and consequent swine confinement, rural communities face the prospects of increasing odor impact...
Impact of swine waste application on ground and stream water quality in an eastern coastal plain watershed
January 1, 1990By K. C. Stone
Nonpoint source pollution from agriculture has been a major concern, particularly where intensive agricultural operations exist near environmentally sensitive waters. To address these concerns, a...
Using GLEAMS and REMM to estimate nutrient movement from a spray field and through a riparian forest.
January 1, 1990By Kenneth C. Stone
With the increased number of large animal production facilities in eastern North Carolina, nutrient accumulation is becoming a problem in surface waters and groundwater. To protect these water...
Swine-lagoon seepage in sandy soil
January 1, 1990By Phillip W. Westerman
Swine manure anaerobic lagoons have sometimes been constructed in sandy soil without clay liners. Although swine manure and other animal manures have been reported to physically ''seal'' lagoons to...
Swine manure nitrogen conservation in storage using sphagnum moss
January 1, 1990
Sphagnum peat moss, floating on swine manure in storage, was tested during three summers as an N conservation method in experimental tanks which measured 0.75 m in diameter and 3.0 m deep. Three...
GLEAMS Simultation of Groundwater Nitrate-N From Row Crop and Swine Wastewater Spray Fields in the Eastern Coastal Plain
January 1, 1990By Kenneth C. Stone
Nonpoint source pollution of surface and groundwater resulting from agricultural management practices is a major water quality problem. This problem was assessed on a demonstration watershed in the...
