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Nitrogen Removal from ADEPT Effluent of Piggery Wastewater using Nitritation/Denitiritation System  

Lee, Hwa-Sun (Boo Kang Tech. co., Ltd)
Min, Kyung-Sok (Department of Environmental Engineering, Kyungpook National University)
Publication Information
Journal of Korean Society on Water Environment / v.22, no.1, 2006 , pp. 134-139 More about this Journal
Abstract
Partial nitirification and denitrification process has been reported to be technically feasible and economically favorable, especially for wastewater treatment with high ammonium concentration or low Carbon/Nitrogen ratio. This research was performed to survey nitrite accumulation by nitritation in treating ADEPT effluent of piggery wastewater, which contains highly concentrated ammonia. To estimate the possibility of nitrite accumulation, DO concentration and SRT were investigated as key operational parameters. This result proved that nitritation to nitrite was steadily obtained under short sludge retention time. Oxygen limitation was proved to be just a subsidiary parameter. Energy efficiency of nitritation-denitritation process was higher than complete nitrification-denitrification because external carbon requirement for denitritation could be saved. Though the influent contained significant nonbiodegradable organic substrate, total nitrogen removal efficiency was more than 51% in nitritation-denitritation system.
Keywords
Denitritation; Nitritation; Piggery wastewater; Sludge retention time;
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