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Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan

Citation:  Pp. 153-163 in the Ninth International Animal, Agricultural and Food Processing Wastes Proceedings of the 12-15 October 2003 Symposium (Research Triangle Park, North Carolina USA), Publication Date 12 October 2003.  701P1203.(doi:10.13031/2013.15245)
Authors:   P. W. Westerman and J. Arogo
Keywords:   Aeration, swine manure, waste treatment, biofilter, nitrification

Alternative waste management systems are being evaluated for swine farms in North Carolina. IESS, Inc. installed an aeration pond treatment system with goals of reducing odor and ammonia emissions, and reducing nitrogen to be land applied. The IESS biokinetic aeration system was installed on a commercial hog farm for treating 190 m3/d (50,000 gal./d) of liquid from a swine anaerobic lagoon. Performance of the treatment system is reported for a 24-month period (Nov. 2000 Oct. 2002). Nitrification, based on increased nitrite and nitrate levels in the aeration pond, varied with temperature. Dissolved oxygen (DO) levels have been variable, and were below the desired minimum of 3 mg/L during various times. Low DO sometimes occurred because of increased loading or loss of aeration due to broken belts on the blower or severed aeration lines. DO levels and system performance were usually within performance expectations during the last 6 months of evaluation. Effluent from the aeration pond has low odor, usually low total ammonia nitrogen, variable amount of nitrate/nitrite nitrogen, and significantly lower concentrations of phosphorus, copper and zinc compared to the anaerobic lagoon. Some operational and maintenance problems during the two-year period points out the need to have someone make a daily inspection, conduct routine preventative maintenance, and correct problems as they occur.

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