Cho, Kyungjin Choi, Minkyu Jeong, Dawoon Lee, Seockheon Bae, Hyokwan 2024-01-20T00:31:55Z 2024-01-20T00:31:55Z 2021-09-04 2017-10 0045-6535 https://pubs.kist.re.kr/handle/201004/122240 The process performance and microbial niche of anaerobic ammonia oxidation (ANAMMOX) bacteria were compared in two identical bioreactors inoculated with different inoculum sources (i.e., pre-cultured ANAMMOX bacteria: PAB and activated sludge: AS) entrapped in poly(vinyl alcohol)/sodium alginate (PVA/SA) gel beads for a long-term period (i.e., 1.5 years). The start-up period with AS was longer than that with PAB; however, both bioreactors were successfully operated over the long-term with stable ANAMMOX activity. After long-term operation, the 16S rRNA gene concentration of ANAMMOX bacteria in both bioreactors was significantly increased, and thereby became comparable. In addition, Candidatus Jettenia sp. became the dominant ANAMMOX species in both bioreactors. Our results suggested that the ANAMMOX performance and microbial niche of ANAMMOX bacteria became nearly identical during long-term operation despite the use of different inoculum sources. Therefore, the use of PVA/SA gel beads entrapping AS appears to be a relevant option for constructing an ANAMMOX process in places where a full-scale ANAMMOX process has never been done previously. (C) 2017 Elsevier Ltd. All rights reserved. English Pergamon Press Ltd. Comparison of inoculum sources for long-term process performance and fate of ANAMMOX bacteria niche in poly(vinyl alcohol)/sodium alginate gel beads Article 10.1016/j.chemosphere.2017.06.123 1 Chemosphere, v.185, pp.394 - 402 Chemosphere 185 394 402 N scie scopus 000408597300045 2-s2.0-85022212502 Environmental Sciences Environmental Sciences & Ecology Article; Proceedings Paper AMMONIUM-OXIDIZING BACTERIA CONVENTIONAL ACTIVATED-SLUDGE MICROBIAL COMMUNITY STRUCTURE CANDIDATUS BROCADIA SINICA NITROGEN REMOVAL START-UP WASTE-WATER IMMOBILIZED CELLS POLYVINYL-ALCOHOL OXIDATION ANAMMOX Anaerobic ammonium oxidation (ANAMMOX) Poly(vinyl alcohol)/sodium alginate (PVA/SA) gel beads Long-term stability Activated sludge qPCR Sequencing