Identification and characterization of core sludge and biofilm microbiota in anaerobic membrane bioreactors
Type
ArticleKAUST Department
Environmental Science and Engineering ProgramWater Desalination and Reuse Research Center (WDRC)
Biological and Environmental Sciences and Engineering (BESE) Division
KAUST Grant Number
FCC/1/1971-32-01Date
2019-09-11Online Publication Date
2019-09-11Print Publication Date
2019-12Permanent link to this record
http://hdl.handle.net/10754/656830
Metadata
Show full item recordAbstract
An 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.Citation
Cheng, 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.2019.105165Sponsors
The 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.Publisher
Elsevier BVJournal
Environment InternationalAdditional Links
https://linkinghub.elsevier.com/retrieve/pii/S0160412019316101ae974a485f413a2113503eed53cd6c53
10.1016/j.envint.2019.105165
Scopus Count
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 (http://creativecommons.org/licenses/BY/4.0/).