Effect of microbial community structure on organic removal and biofouling in membrane adsorption bioreactor used in seawater pretreatment
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ArticleAuthors
Jeong, SanghyunCho, Kyungjin
Bae, Hyokwan

Keshvardoust, Pejhman
Rice, Scott A.
Vigneswaran, Saravanamuthu
Lee, Seockheon
Leiknes, TorOve

KAUST Department
Biological and Environmental Sciences and Engineering (BESE) DivisionEnvironmental Science and Engineering Program
Water Desalination and Reuse Research Center (WDRC)
Date
2016-03-03Online Publication Date
2016-03-03Print Publication Date
2016-06Permanent link to this record
http://hdl.handle.net/10754/600680
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Membrane bioreactors (MBRs) were operated on-site for 56 d with different powdered activated carbon (PAC) dosages of 0, 1.5 and 5.0 g/L to pretreat seawater for reverse osmosis desalination. It was hypothesized that PAC would stimulate adsorption and biological degradation of organic compounds. The microbial communities responsible for biofouling on microfiltration (MF) membranes and biological organic removal in MBR were assessed using terminal restriction fragment length polymorphism fingerprinting and 454-pyrosequencing. The PAC addition improved assimilable organic carbon removal (53-59%), and resulted in reduced biofouling development on MF (> 50%) with only a marginal development in trans-membrane pressure. Interestingly, the bacterial community composition was significantly differentiated by the PAC addition. Cyanobacterium, Pelagibaca and Maricoccus were dominant in the PAC-free conditions, while Thiothrix and Sphingomonas were presumably responsible for the better reactor performances in PAC-added conditions. In contrast, the archaeal communities were consistent with predominance of Candidatus Nitrosopumilus. These data therefore show that the addition of PAC can improve MBR performance by developing different bacterial species, controlling AOC and associated biofouling on the membranes.Citation
Effect of microbial community structure on organic removal and biofouling in membrane adsorption bioreactor used in seawater pretreatment 2016 Chemical Engineering JournalSponsors
This study was supported by the National Centre of Excellence in Desalination Australia (NCEDA), which was funded by the Australian Government through the Water for the Future initiative (Project code: 08314).Publisher
Elsevier BVJournal
Chemical Engineering JournalAdditional Links
http://linkinghub.elsevier.com/retrieve/pii/S1385894716302170ae974a485f413a2113503eed53cd6c53
10.1016/j.cej.2016.02.108