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Variation of Nitrogen Removal Efficiency and Microbial Communities Depending on Operating Conditions of a CANON Process
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 Title & Authors
Variation of Nitrogen Removal Efficiency and Microbial Communities Depending on Operating Conditions of a CANON Process
Jo, Kyungmin; Park, Younghyun; Cho, Sunja; Lee, Taeho;
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Nitrogen removal is one of the most important issues about wastewater treatment because nitrogen is a primary pollutant caused various problems such as eutrophication. We developed a CANON microbial community by using AOB and ANAMMOX bacteria as seeding sources. When 100 mg-N/L of influent ammonium was supplied, the DO above 0.4 mg/L showed a very low TN removal efficiency while the DO of 0.3 mg/L showed TN removal efficiency as high as 71.3%. When the influent ammonium concentration was reduced to 50 mg/L, TN removal efficiency drastically deceased. However, TN removal efficiency was recovered to above 70% after 14 day operation when the influent nitrogen concentration was changed again from 50 mg-N/L to 100 mg-N/L. According to the operating temperature from to , TN removal efficiency also rapidly decreased but gradually increased again up to %. The analysis of PCR-DGGE showed no substantial difference in microbial community structures under different operational conditions. This suggests that if CANON sludge is once successfully developed from a mixture of AOB and ANAMMOX bacteria, the microbial community can be stably maintained regardless of the changes in operational conditions.
CANON;ANAMMOX;Partial Nitrification;Microbial Community;
 Cited by
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