Dynamics of the Fouling Layer Microbial Community in a Membrane Bioreactor

Anja Sloth Ziegler, Simon Jon McIlroy, Poul Larsen, Mads Albertsen, Aviaja Anna Hansen, Nicolas Heinen, Per Halkjær Nielsen

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

40 Citationer (Scopus)
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Abstract

Membrane fouling presents the greatest challenge to the application of membrane bioreactor (MBR) technology. Formation of biofilms on the membrane surface is the suggested cause, yet little is known of the composition or dynamics of the microbial community responsible. To gain an insight into this important question, we applied 16S rRNA gene amplicon sequencing with a curated taxonomy and fluorescent in situ hybridization to monitor the community of a pilot-scale MBR carrying out enhanced biological nitrogen and phosphorus removal with municipal wastewater. In order to track the dynamics of the fouling process, we concurrently investigated the communities of the biofilm, MBR bulk sludge, and the conventional activated sludge system used to seed the MBR system over several weeks from start-up. As the biofilm matured the initially abundant betaproteobacterial genera Limnohabitans, Hydrogenophaga and Malikia were succeeded by filamentous Chloroflexi and Gordonia as the abundant species. This study indicates that, although putative pioneer species appear, the biofilm became increasingly similar to the bulk community with time. This suggests that the microbial population in bulk water will largely determine the community structure of the mature biofilm.
OriginalsprogEngelsk
Artikelnummere0158811
TidsskriftP L o S One
Vol/bind11
Udgave nummer7
Antal sider14
ISSN1932-6203
DOI
StatusUdgivet - 11 jun. 2016

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