Influence of aeration rate and liquid temperature on ammonia emission rate and manure degradation in batch aerobic treatment
January 1, 2003By JUN ZHU
The influence of aeration rates (26, 63, and 100 ug O2 g VS-1 min-1) at different temperatures (5°C, 15°C, and 25°C) on ammonia emission and breakdown of organic materials was studied using 15.3...
Effects of bioreactor temperature and time on odor-related parameters in aerated swine manure slurries
January 1, 2003
Previous studies have linked odor generation from swine manure to some characteristics of the liquid manure such oxidation-reduction potential (ORP), five-day biochemical oxygen demand (BOD5),...
Precipitation of liquid swine manure phosphates using magnesium smelting by-products
January 1, 2003By and N. Ziadi|G. Be´ langer|G. Parent
Swine manure contains considerable amounts of total (P) and soluble phosphorus (PO4-P) which may increase the soil P content when applied in excess to crop requirements and, consequently, risk water...
Interactive effects of composts and liquid pig manure with added nitrate on soil carbon dioxide and nitrous oxide emissions from soil under aerobic and anaerobic conditions
January 1, 2003
The composting process results in immobilization of inorganic N. When high-N-demanding crops are grown in compost-amended soils, additional N fertilizer is often applied. The combination of elevated...
Fungal population levels in soils of commercial swine waste disposal sites and relationships to soil nutrient concentrations
January 1, 2003By R. Pratt U.S. Department of Agriculture
Commercial disposal of animal wastes by application to agricultural soils is well-known to increase soil nutrient concentrations and the potential for water pollution. Less is known of whether or how...
Optimization of phosphorus precipitation from swine manure slurries to enhance recovery
January 1, 2003By Robert Burns
Laboratory experiments were conducted using magnesium chloride (MgCl2·6H2O, 64% solution) to force the precipitation of phosphorus and reduce the concentration of soluble phosphorus (PO4 3?) in two...
Management strategies to simultaneously reduce ammonia, nitrous oxide and odour emissions from surface-applied swine manure
January 1, 2003By Smith E.
Surface-applied swine manure has the potential to generate ammonia (NH3), nitrous oxide (N2O) and odour. Field research was conducted in Prince Edward Island to measure the simultaneous emissions of...
Comparative investigation of sequentially extracted phosphorus fractions in a sandy loam soil and a swine manure
January 1, 2003By Z. He
Sequential fractionation is one of the most common methods used to investigate phosphorus (P) forms in soils. The strategy can be used for evaluating bioavailability of soil P and for investigating...
Transformations of soil and manure phosphorus after surface application of manure to field plots
January 1, 2003By P. A. Vadas (&) USDA-ARS|U.S. Dairy Forage Research Center
Transfer of phosphorus (P) from surface-applied manures to runoff is an important source of pollution, but few studies have closely monitored P dynamics in manure, soil, and runoff through time. We...
Comparing ammonium ion dissociation constant in swine anaerobic lagoon liquid and deionized water
January 1, 2003By Jactone Arogo
The dissociation constant of ammonium ion both in deionized water and swine anaerobic lagoon liquid was determined experimentally in a convective emission chamber at three temperatures (15 degrees...
