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Anti-Biofouling Performance of an Immobilized Indigenous Quorum Quenching Bacterium Bacillus cereus HG10 and Its Influence on the Microbial Community in a Bioreactor

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College of Life Sciences and Oceanography, Shenzhen University, Shenzhen 518055, China
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Shenzhen Engineering Laboratory for Recycled Eco-efficient Materials, School of Environment and Energy, Peking University Shenzhen Graduate School, Xili University Town, Shenzhen 518055, China
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Fairylands Environmental Sci-Tech (Shenzhen) Crop. Ltd., Shenzhen 518055, China
*
Authors to whom correspondence should be addressed.
Int. J. Environ. Res. Public Health 2019, 16(19), 3777; https://doi.org/10.3390/ijerph16193777
Received: 27 July 2019 / Revised: 4 October 2019 / Accepted: 4 October 2019 / Published: 8 October 2019
(This article belongs to the Section Environmental Science and Engineering)
Quorum quenching-membrane bioreactors (QQ-MBRs) have been studied widely in recent decades. However, limited information is known about the influence of QQ on the microbial community. In this study, the indigenous QQ bacterium Bacillus cereus HG10 was immobilized and used to control biofouling in a bioreactor. QQ beads caused extracellular polymeric substance reduction and significantly hindered biofilm formation on a submerged membrane. Community profiling of 16S rRNA gene amplicons revealed that QQ beads dramatically altered the bacterial community structure in activated sludge but not in biofilm. Bacterial structure in the presence of QQ beads showed a clear divergence from that of the control groups at phylum, class, order, family, and genus taxonomic ranks. A significant enrichment of several bacterial genera, including Acinetobacter, Aeromonas, Delftia, Bacillus, and Pseudomonas, and depletion of over 12 bacterial genera were observed. These findings would contribute to a better understanding of why and how immobilized QQ bacteria impair membrane biofouling in QQ-MBRs. View Full-Text
Keywords: Bacillus cereus; biofouling; quorum quenching; 16S rRNA gene profiling Bacillus cereus; biofouling; quorum quenching; 16S rRNA gene profiling
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Xu, F.; Zhao, C.; Lee, C.H.; Wang, W.; Xu, Q. Anti-Biofouling Performance of an Immobilized Indigenous Quorum Quenching Bacterium Bacillus cereus HG10 and Its Influence on the Microbial Community in a Bioreactor. Int. J. Environ. Res. Public Health 2019, 16, 3777.

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