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dc.contributor.authorCheng, Hong
dc.contributor.authorCheng, Dan
dc.contributor.authorMao, Junwen
dc.contributor.authorLu, Ting
dc.contributor.authorHong, Pei-Ying
dc.identifier.citationCheng, H., Cheng, D., Mao, J., Lu, T., & Hong, P.-Y. (2019). Identification and characterization of core sludge and biofilm microbiota in anaerobic membrane bioreactors. Environment International, 133, 105165. doi:10.1016/j.envint.2019.105165
dc.description.abstractAn analysis of sludge (i.e., 63 samples) and biofilm (i.e., 79 samples) sampled from 13 anaerobic membrane bioreactors (AnMBR) was conducted. Predominant microbial community identification and multivariate analysis indicate that these reactors showed different microbial community structure, but these differences had no impact on the overall AnMBR performance. Instead, core microbial genera which occurred in ≥90% of sludge (20 genera) and biofilm (12 genera) samples could potentially account for the AnMBR performance. A further calculation on net growth rate (NGR) of core genera in sludge suggested distribution into two main groups (i.e., I: low relative abundance and NGR, II: high relative abundance or high NGR). Consistent positive correlations between bacterial genera were observed among those that exhibited either high relative abundance or high NGR. The anaerobic microbial consortium in both sludge and biofilm were largely affected by stochastic dispersal and migration processes (i.e., neutral assembly). However, Acinetobacter spp. and Methanobacterium spp. occurred consistently in higher frequency in the biofilm but in lower occurrence frequency in the AnMBR permeate. Findings from this study suggest first, specific core microorganisms exist in the sludge regardless of the operating conditions of the AnMBRs, and second, prevention of biofoulant layer on anaerobic membranes can be devised by minimizing attachment of microbes on surfaces in a non-selective manner.
dc.description.sponsorshipThe authors would like to thank Mr. Liuwei Wang for providing technical assistance on drawing by R. This study is supported by KAUST Center Competitive Funding FCC/1/1971-32-01 awarded to P.-Y. Hong.
dc.publisherElsevier BV
dc.rightsPublished by Elsevier Ltd. This is an open access article under the CC BY license (
dc.subjectCore microorganisms
dc.subjectNet growth rate
dc.subjectCorrelative interaction
dc.subjectNeutral assembly
dc.titleIdentification and characterization of core sludge and biofilm microbiota in anaerobic membrane bioreactors
dc.contributor.departmentEnvironmental Science and Engineering Program
dc.contributor.departmentWater Desalination and Reuse Research Center (WDRC)
dc.contributor.departmentBiological and Environmental Sciences and Engineering (BESE) Division
dc.identifier.journalEnvironment International
dc.eprint.versionPublisher's Version/PDF
dc.contributor.institutionSingapore Centre for Environmental Life Sciences Engineering (SCELSE), Nanyang Technological University, Singapore 637551, Singapore
dc.contributor.institutionDepartment of Physics, Huzhou University, Zhejiang 313000, China
dc.contributor.institutionDepartment of Bioengineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
kaust.personCheng, Hong
kaust.personHong, Pei-Ying

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Published by Elsevier Ltd. This is an open access article under the CC BY license (
Except where otherwise noted, this item's license is described as Published by Elsevier Ltd. This is an open access article under the CC BY license (