title: Long term assessment of factors affecting nitrifying bacteria communities and N-removal in a full-scale biological process treating high strength hazardous wastewater.
abstract: 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.
authors.affiliation: Department of Civil Engineering, Dong-A University, Busan 604-714, Republic of Korea. kim78051@postech.ac.kr
authors.forename: Young Mo
authors.initials: YM
authors.lastname: Kim
authors.forename: Hongkeun
authors.initials: H
authors.lastname: Park
authors.forename: Kyung Hwa
authors.initials: KH
authors.lastname: Cho
authors.forename: Jong Moon
authors.initials: JM
authors.lastname: Park
mesh_terms: D000641:Ammonia / Q000032:analysis; D001419:Bacteria / Q000235:genetics / Q000378:metabolism*; D001673:Biodegradation, Environmental; D006863:Hydrogen-Ion Concentration; D009566:Nitrates / Q000032:analysis; D058465:Nitrification; D009573:Nitrites / Q000032:analysis; D009584:Nitrogen / Q000302:isolation & purification*; D010084:Oxidation-Reduction; D016133:Polymerase Chain Reaction; D012150:Polymorphism, Restriction Fragment Length; D025341:Principal Component Analysis; D012722:Sewage / Q000382:microbiology; D013696:Temperature; D013997:Time Factors; D014865:Waste Disposal, Fluid; D062065:Wastewater / Q000737:chemistry / Q000382:microbiology*; D014874:Water Pollutants, Chemical / Q000302:isolation & purification*; D018508:Water Purification / Q000295:instrumentation / Q000379:methods*; D060753:Water Quality
chemical_list: D000641:Ammonia; D009566:Nitrates; D009573:Nitrites; D009584:Nitrogen; D012722:Sewage; D062065:Wastewater; D014874:Water Pollutants, Chemical