Cho, Kyungjin Shin, Seung Gu Lee, Joonyeob Koo, Taewoan Kim, Woong Hwang, Seokhwan 2024-01-20T03:34:08Z 2024-01-20T03:34:08Z 2021-09-05 2016-08 1389-1723 https://pubs.kist.re.kr/handle/201004/123822 The aim of this study was to investigate the nitrification resilience pattern and examine the key ammonia-oxidizing bacteria (AOB) with respect to ammonia loading shocks (ALSs) in a nitrification bioreactor treating steel wastewater. The perturbation experiments were conducted in a 4-L bioreactor operated in continuous mode with a hydraulic retention time of 10 d. Three sequential ALSs were given to the bioreactor (120, 180 and 180 mg total ammonia nitrogen (TAN)/L. When the first shock was given, the nitrification process completely recovered after 14 d of further operation. However, the resilience duration was significantly reduced to 1 d after the second and third ALSs. In the bioreactor, Nitrosomonas aestuarii dominated the other AOB species, Nitrosomonas europaea and N. nitrosa, throughout the process. In addition, the population of N. aestuarii increased with ammonia utilization following each ALS; i.e., this species responded to acute ammonia overloadings by contributing to ammonia oxidation. This finding suggests that N. aestuarii could be exploited to achieve stable nitrification in industrial wastewaters that contain high concentrations of ammonia. (C) 2016, The Society for Biotechnology, Japan. All rights reserved. English The Society of Bioscience and Bioengineering Japan/Seibutsu Kogakkai Nitrification resilience and community dynamics of ammonia-oxidizing bacteria with respect to ammonia loading shock in a nitrification reactor treating steel wastewater Article 10.1016/j.jbiosc.2016.01.009 1 Journal of Bioscience and Bioengineering, v.122, no.2, pp.196 - 202 Journal of Bioscience and Bioengineering 122 2 196 202 N scie scopus 000381835800010 2-s2.0-84958211356 Biotechnology & Applied Microbiology Food Science & Technology Biotechnology & Applied Microbiology Food Science & Technology Article ACTIVATED-SLUDGE NITRIFYING COMMUNITY POPULATION-DYNAMICS NITROGEN REMOVAL TREATMENT PLANTS NITROSOMONAS PERFORMANCE OXIDATION NITRITE DENITRIFICATION Nitrification Ammonia loading shock Steel wastewater Quantitative PCR Denaturing gradient gel electrophoresis