Journal
BIORESOURCE TECHNOLOGY
Volume 134, Issue -, Pages 180-189Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2013.02.036
Keywords
Activated sludge; Full-scale process; Nitrifying bacteria; Nitrification; PCA
Funding
- National Research Foundation of Korea
- Korean Government Ministry of Education, Science and Technology [NRF-2011-357-D00140]
- WCU (World Class University) program through the National Research Foundation of Korea
- Ministry of Education, Science and Technology [R31-30005, ABC-2010-0029800]
- Advanced Biomass R&D Center (ABC) of Korea
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Over a 3 year period, interactions between nitrifying bacterial communities and the operational parameters of a full-scale wastewater treatment plant were analyzed to assess their impact on nitrification performance. Throughout the study period, nitrification fluctuated while Nitrosomonas europaea and Nitrosomonas nitrosa, the two major ammonia oxidizing bacteria (AOB) communities, showed resistance to changes in operational and environmental conditions. Nitrobacter populations mostly exceeded those of Nitrospira within nitrite oxidizing bacteria (NOB). Meanwhile, principal component analysis (PCA) results revealed that a close association between Nitrobacter and nitrite concentration as well as a direct correlation between the quantity of AOB and influent SCN- concentration. The serial shifts of data points over time showed that the nitrification of a full-scale treatment plant has been gradually suppressed by the influence of influent COD and phenol concentrations. (C) 2013 Elsevier Ltd. All rights reserved.
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