Journal of Microbiology and Biotechnology
The Korean Society for Microbiology and Biotechnology publishes the Journal of Microbiology and Biotechnology.

2016 ; Vol.26-9: 1593~1604

AuthorSung Jun Jo, Hyeokpil Kwon, So-Yeon Jeong, Sang Hyun Lee, Hyun-Suk Oh, Taewoo Yi, Chung-Hak Lee, Tae Gwan Kim
Place of dutySchool of Chemical and Biological Engineering, Seoul National University, Seoul 08826, Republic of Korea
TitleEffects of Quorum Quenching on the Microbial Community of Biofilm in an Anoxic/Oxic MBR for Wastewater Treatment
PublicationInfo J. Microbiol. Biotechnol.2016 ; Vol.26-9
AbstractRecently, bacterial quorum quenching (QQ) has been proven to have potential as an innovative approach for biofouling control in membrane bioreactors (MBRs) for advanced wastewater treatment. Although information regarding the microbial community is crucial for the development of QQ strategies, little information exists on the microbial ecology in QQMBRs. In this study, the microbial communities of biofilm were investigated in relation to the effect of QQ on anoxic/oxic MBRs. Two laboratory-scale MBRs were operated with and without QQ-beads (QQ-bacteria entrapped in beads). The transmembrane pressure increase in the QQ-MBRs was delayed by approximately 100-110% compared with conventional- and vacant-MBRs (beads without QQ-bacteria) at 45 kPa. In terms of the microbial community, QQ gradually favored the development of a diverse and even community. QQ had an effect on both the bacterial composition and change rate of the bacterial composition. Proteobacteria and Bacteroidetes were the most dominant phyla in the biofilm, and the average relative composition of Proteobacteria was low in the QQ-MBR. Thiothrix sp. was the dominant bacterium in the biofilm. The relative composition of Thiothrix sp. was low in the QQ-MBR. These findings provide useful information that can inform the development of a new QQ strategy.
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Supplemental Data
Key_wordMembrane bioreactor, Biofouling, Biofilm, Quorum sensing, Quorum quenching, Microbial community
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