Pathogen Behaviour Assessment During Biosolids Application in Soils Used for Pasture at a Dairy Cattle Farm
Abstract:Wastewater treatment generated sludge can be stabilized and dehydrated to be disposed of to the soil. The main restrictions to such disposition are related to sludge heavy metals and pathogen microorganisms contents. Although regulated standard permissible concentrations for agricultural use exist, it is necessary to find alternatives allowing pathogen behavior assessment under different environmental conditions in countries where better quality is not possible to achieve. This survey assessed the behavior of pathogen microorganisms present in a stabilized biosolid applied to the pasture cultivation soils at dairy cattle breeding farms. Results show a rapid decrease on the concentration of the assessed indicators in a 45 days period, reducing the risk caused by this type of practice.
Document Type: Research Article
Publication date: January 1, 2010
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