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J Korean Soc Environ Eng > Volume 37(6); 2015 > Article
J Korean Soc Environ Eng 2015;37(6): 332-339. doi: https://doi.org/10.4491/KSEE.2015.37.6.332
CANON 공정에서 운전조건에 따른 질소 제거효율 및 미생물군집 변화
조경민1, 박영현1, 조순자2, 이태호1
1부산대학교 사회환경시스템공학부
2부산대학교 미생물학과
Variation of Nitrogen Removal Efficiency and Microbial Communities Depending on Operating Conditions of a CANON Process
Kyungmin Jo1, Younghyun Park1, Sunja Cho2, Taeho Lee1
1Department of civil and environmental engineering, Pusan National University
2Department of microbiology, Pusan National University
Corresponding author  Taeho Lee ,Tel: 051-510-2465 , Fax: 051-514-9574, Email: leeth55@pusan.ac.kr
Received: April 3, 2015;  Revised: June 15, 2015;  Accepted: June 20, 2015.  Published online: June 30, 2015.
ABSTRACT
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 37±1℃ to 20±1℃, TN removal efficiency also rapidly decreased but gradually increased again up to 70.0±2.6%. 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.
Key Words: CANON, ANAMMOX, Partial Nitrification, Microbial Community
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