期刊
WATER RESEARCH
卷 194, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.watres.2021.116912
关键词
Anammox; Anaerobic methane oxidation; n-DAMO; Membrane biofilm reactor; Domestic sewage; Anaerobic digestion liquor
资金
- Australian Research Council Linkage project [LP180100772]
- MERINO (Maximizing Energy Recovery through Innovative Nitrogen remOval) - Melbourne Water Corporation, Urban Utilities
- South Australian Water Corporation
- Advanced Queensland Research Fellowship (AQRF), entitled Energy-positive domestic wastewater treatment
- Urban Utilities (Queensland, Australia)
- Australian Research Council Future Fellowship [FT170100196]
- Australian Research Council Australian Laureate Fellowship [FL170100086]
- Australian Research Council [LP180100772] Funding Source: Australian Research Council
This study demonstrated the versatile applications of n-DAMO process in real wastewater treatment for the first time, achieving effective nitrogen removal by combining anammox and n-DAMO microorganisms.
Nitrite/nitrate-dependent anaerobic methane oxidation (n-DAMO) processes have been proven effective for nitrogen removal from synthetic wastewater. However, the demonstration using real wastewater has not been achieved yet. To this end, this study investigated the versatile applications of n-DAMO process in real wastewater treatment for the first time. Two methane-based membrane biofilm reactors (MBfRs) were employed to combine anammox and n-DAMO microorganisms, targeting nitrogen removal in mainstream (i.e., domestic sewage) and sidestream (i.e., anaerobic digestion liquor), respectively. Considering various technologies in sewage treatment, three different technical routes, including nitritation + methane-based MBfR, partial nitritation + methane-based MBfR and partial nitritation + anammox + methane-based MBfR, were investigated comprehensively, all producing effluent quality with total nitrogen (TN) at 5 mg N/L or less. Regarding the sidestream treatment, the methane-based MBfR also removed up to 96% TN from the partially nitrified anaerobic digestion liquor at a practically useful rate of 0.5 kg N/m(3)/d. Microbial communities revealed by 16S rRNA gene amplicon sequencing indicated the dominance of n-DAMO archaea in both reactors, along with the existence of anammox bacteria and n-DAMO bacteria. As the first demonstration of n-DAMO process in real wastewater, this study comprehensively confirmed the applicability of using methane as carbon source to remove nitrogen from both mainstream and sidestream wastewater, supporting their adoption by industries in practice. (C) 2021 Elsevier Ltd. All rights reserved.
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