ANAEROBIC AND AEROBIC TREATMENT OF ANIMAL MANURE – A REVIEW
Abstract:A large number of treatment techniques are practiced in manure management. Many were transferred directly from the municipal wastewater treatment field. The technologies include low-tech anaerobic treatment with or without energy recovery followed by land application, and all alternative techniques of anaerobic, aerobic, treatment, as well as combined biological nutrient removal systems. The challenge has been to develop a treatment system that performs well regarding the objectives (waste stabilization, odor control, nutrient management, etc.), and that is also economical and relatively easy to operate.
A review of anaerobic and aerobic treatment technologies for manure from livestock housed in CAFOs (Confined Animal Feeding Operations) is presented. The effectiveness in reducing odor and gaseous emissions, organic matter, nutrients and pathogen indicators is discussed. Experimental data based on both pilot and farm-scale experiments conducted to evaluate performance are presented. The following systems are discussed with relative detail: anaerobic lagoons, anaerobic digesters, activated sludge (including sequencing batch reactors), and aerated biofilters. Economical data are presented for specific systems when available.
Document Type: Research Article
Publication date: January 1, 2000
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