PMID- 38320714 OWN - NLM STAT- MEDLINE DCOM- 20240301 LR - 20240301 IS - 1873-2976 (Electronic) IS - 0960-8524 (Linking) VI - 396 DP - 2024 Mar TI - Rapid anaerobic culture and reaction kinetic study of anammox bacteria on microfluidic chip. PG - 130422 LID - S0960-8524(24)00125-1 [pii] LID - 10.1016/j.biortech.2024.130422 [doi] AB - Anammox bacteria are being increasingly investigated as part of an emerging nitrogen removal technology. However, due to the difficulty in culturing, current understanding of their behavior is limited. In this study, anaerobic microfluidic chips were used to study anammox bacteria, showing great advantages over reactors. On-chip fluorescence in situ hybridization (FISH) showed the relative abundance of free form anammox bacteria increased by 56.1 % after one week's culture, an increase that is three times higher than that of bioreactor (17.1 %). For granular form cultures, the nitrogen removal load reached 2.34 approximately 2.51 kg-N/(m(3).d), which was also substantially higher than the bioreactor ( approximately 1.22 kg-N/(m(3).d)). Furthermore, studying the kinetics of nitrite inhibition of granular sludge with different particle sizes (100-900 mum) showed that the maximum ammonia load and the nitrite semi-saturation coefficient noticeably decreased for smaller particle sizes. These results illustrate the usefulness of the microfluidic method for in-depth understanding anammox process and its implementation. CI - Copyright (c) 2024. Published by Elsevier Ltd. FAU - Li, Bing AU - Li B AD - School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China. FAU - Mao, Siyuan AU - Mao S AD - School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China. FAU - Zhang, Chi AU - Zhang C AD - School of Environment, Tsinghua University, Beijing 100084, China. FAU - Xu, Tiansi AU - Xu T AD - School of Environment, Tsinghua University, Beijing 100084, China. FAU - Ma, Xueyan AU - Ma X AD - School of Environment, Tsinghua University, Beijing 100084, China. FAU - Lin, Hai AU - Lin H AD - School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China. FAU - Yin, Huabing AU - Yin H AD - James Watt School of Engineering, University of Glasgow, Glasgow G12 8LT, UK. Electronic address: huabing.yin@glasgow.ac.uk. FAU - Qiu, Yong AU - Qiu Y AD - School of Environment, Tsinghua University, Beijing 100084, China. Electronic address: qiuyong@tsinghua.edu.cn. LA - eng PT - Journal Article DEP - 20240205 PL - England TA - Bioresour Technol JT - Bioresource technology JID - 9889523 RN - 0 (Nitrites) RN - 7664-41-7 (Ammonia) RN - N762921K75 (Nitrogen) RN - 0 (Sewage) SB - IM MH - Anaerobiosis MH - In Situ Hybridization, Fluorescence MH - *Nitrites MH - *Anaerobic Ammonia Oxidation MH - Microfluidics MH - Bacteria/genetics MH - Ammonia MH - Bioreactors/microbiology MH - Oxidation-Reduction MH - Nitrogen MH - Sewage/microbiology MH - Bacteria, Anaerobic OTO - NOTNLM OT - Anammox OT - Granular sludge OT - Kinetics OT - Microfluidic chip OT - Nitrite inhibition COIS- Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper. EDAT- 2024/02/07 00:42 MHDA- 2024/03/01 06:44 CRDT- 2024/02/06 19:19 PHST- 2023/12/09 00:00 [received] PHST- 2024/02/02 00:00 [revised] PHST- 2024/02/03 00:00 [accepted] PHST- 2024/03/01 06:44 [medline] PHST- 2024/02/07 00:42 [pubmed] PHST- 2024/02/06 19:19 [entrez] AID - S0960-8524(24)00125-1 [pii] AID - 10.1016/j.biortech.2024.130422 [doi] PST - ppublish SO - Bioresour Technol. 2024 Mar;396:130422. doi: 10.1016/j.biortech.2024.130422. Epub 2024 Feb 5.