PMID- 23053088 OWN - NLM STAT- MEDLINE DCOM- 20140108 LR - 20130701 IS - 1432-0614 (Electronic) IS - 0175-7598 (Linking) VI - 97 IP - 14 DP - 2013 Jul TI - Nitrifying bacterial community structures and their nitrification performance under sufficient and limited inorganic carbon conditions. PG - 6513-23 LID - 10.1007/s00253-012-4436-y [doi] AB - This study examined the hypothesis that different inorganic carbon (IC) conditions enrich different ammonia-oxidizing bacteria (AOB) and nitrite-oxidizing bacteria (NOB) populations by operating two laboratory-scale continuous-flow bioreactors fed with 15 and 100 mg IC/L, respectively. During this study, both bioreactors maintained satisfactory nitrification performance and stably oxidized 250 mg N/L of influent ammonium without nitrite accumulation. Based on results of cloning/sequencing and terminal restriction fragment length polymorphism targeting on the ammonia monooxygenase subunit A (amoA) gene, Nitrosomonas nitrosa lineage was identified as the dominant AOB population in the high-IC bioreactor, while Nitrosomonas europaea and Nitrosomonas nitrosa lineage AOB were dominant in the low-IC bioreactor. Results of real-time polymerase chain reactions for Nitrobacter and Nitrospira 16S rRNA genes indicated that Nitrospira was the predominant NOB population in the high-IC bioreactor, while Nitrobacter was the dominant NOB in the low-IC bioreactor. Furthermore, batch experiment results suggest that N. europaea and Nitrobacter populations are proliferated in the low-IC bioreactor due to their higher rates under low IC conditions despite the fact that these two populations have been identified as weak competitors, compared with N. nitrosa and Nitrospira, under low ammonium/nitrite environments. This study revealed that in addition to ammonium/nitrite concentrations, limited IC conditions may also be important in selecting dominant AOB/NOB communities of nitrifying bioreactors. FAU - Fukushima, Toshikazu AU - Fukushima T AD - Department of Environmental Engineering, National Cheng Kung University, Tainan 701, Taiwan, Republic of China. FAU - Whang, Liang-Ming AU - Whang LM FAU - Chiang, Ting-Yu AU - Chiang TY FAU - Lin, Yi-Hsuan AU - Lin YH FAU - Chevalier, Lizette R AU - Chevalier LR FAU - Chen, Mei-Chun AU - Chen MC FAU - Wu, Yi-Ju AU - Wu YJ LA - eng SI - GENBANK/AB622973 SI - GENBANK/AB622974 SI - GENBANK/AB622975 SI - GENBANK/AB622976 SI - GENBANK/AB622977 SI - GENBANK/AB622978 SI - GENBANK/AB622979 SI - GENBANK/AB622980 SI - GENBANK/AB622981 SI - GENBANK/AB622982 SI - GENBANK/AB622983 SI - GENBANK/AB738418 SI - GENBANK/AB738419 SI - GENBANK/AB740393 SI - GENBANK/AB740394 SI - GENBANK/AB740395 SI - GENBANK/AB740396 SI - GENBANK/AB740397 SI - GENBANK/AB740398 SI - GENBANK/AB740399 SI - GENBANK/AB740400 SI - GENBANK/AB740401 SI - GENBANK/AB740402 SI - GENBANK/AB740403 SI - GENBANK/AB740404 PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20121004 PL - Germany TA - Appl Microbiol Biotechnol JT - Applied microbiology and biotechnology JID - 8406612 RN - 0 (Nitrites) RN - 0 (Sewage) RN - 7440-44-0 (Carbon) RN - 7664-41-7 (Ammonia) SB - IM MH - Ammonia/*metabolism MH - Bacteria/classification/genetics/*isolation & purification/*metabolism MH - Bioreactors/microbiology MH - Carbon/*metabolism MH - Molecular Sequence Data MH - Nitrification MH - Nitrites/*metabolism MH - Oxidation-Reduction MH - Phylogeny MH - Sewage/microbiology EDAT- 2012/10/12 06:00 MHDA- 2014/01/09 06:00 CRDT- 2012/10/12 06:00 PHST- 2012/06/24 00:00 [received] PHST- 2012/09/11 00:00 [accepted] PHST- 2012/08/13 00:00 [revised] PHST- 2012/10/12 06:00 [entrez] PHST- 2012/10/12 06:00 [pubmed] PHST- 2014/01/09 06:00 [medline] AID - 10.1007/s00253-012-4436-y [doi] PST - ppublish SO - Appl Microbiol Biotechnol. 2013 Jul;97(14):6513-23. doi: 10.1007/s00253-012-4436-y. Epub 2012 Oct 4.