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Versatility of nitrite/nitrate-dependent anaerobic methane oxidation (n-DAMO): First demonstration with real wastewater by Zhuan Khai Lim; Tao Liu; Min Zheng; Zhiguo Yuan; Jianhua Guo; Shihu Hu is a Environmental Science article available to read on EtoBox.

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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/d. Microbial communities revealed by 16S rRNA gene amplicon sequencing indicat

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Author

Zhuan Khai Lim; Tao Liu; Min Zheng; Zhiguo Yuan; Jianhua Guo; Shihu Hu

Publisher

Elsevier BV

Published

2021

Language

EN

Field

Environmental Science (Physical Sciences)