Achieving mainstream nitrogen removal by partial nitrification and anammox in the carriers-coupled membrane aerated biofilm reactor.

Autor: Wang L; State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing, China., Zhang C; State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing, China., Liu Y; State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing, China., Qiu Y; State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing, China., Wanyan D; Research Institute for Environmental Innovation (Suzhou) Tsinghua, Suzhou 215009, China., Liu J; Research Institute for Environmental Innovation (Suzhou) Tsinghua, Suzhou 215009, China., Cheng G; Research Institute for Environmental Innovation (Suzhou) Tsinghua, Suzhou 215009, China., Lin P; Research Institute for Environmental Innovation (Suzhou) Tsinghua, Suzhou 215009, China., Huang X; State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing, China; Research and Application Centre for Membrane Technology, School of Environment, Tsinghua University, Beijing, 100084, China. Electronic address: xhuang@tsinghua.edu.cn.
Jazyk: angličtina
Zdroj: Water research [Water Res] 2024 Dec 17; Vol. 271, pp. 123000. Date of Electronic Publication: 2024 Dec 17.
DOI: 10.1016/j.watres.2024.123000
Abstrakt: The integration of partial nitrification-anammox (PN/A) into membrane-aerated biofilm reactor (MABR) is a promisingly energy-efficient and high-efficiency technology for nitrogen removal. The inhibition of nitrite oxidizing bacteria (NOB) remains as the most significant challenge for its development. In our investigation, we proposed a novel process to integrate carriers to MABR (CMABR), which combined the carriers enriched with anaerobic ammonium-oxidizing bacteria (AnAOB) and partial nitrifying MABR system. The effect of different hydraulic retention time (HRT) was explored in CMABR and it showed that the nitrogen removal rate of CMABR could reach more than 200 g-N/(m 3 ·d) at an HRT of 3 h The increase of NOB activity was witnessed when the residual NH 4 + -N concentration was lower than 5 mg-N/L. Finally, the higher nitrogen removal rate and successful PN/A can be achieved by optimized condition through the operation of two-stage CMABRs with 30 % of carriers filling ratio and a total HRT of 6 h Superior NH 4 + -N removal efficiency (97 %) and total nitrogen removal efficiency (81 %) were reached compared with other MABR for PN/A processes. The CMABR exerted the special advantage that significant AnAOB attached on the carriers, rather than only on the membrane biofilm, thus it was beneficial to maintain the activity of ammonia oxidizing bacteria (AOB) and improve the nitrogen removal rate and effluent quality. This investigation provides creative and significant perspectives for the design and operation of PN/A processes in the future MABR applications.
Competing Interests: 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.
(Copyright © 2024. Published by Elsevier Ltd.)
Databáze: MEDLINE
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