2016 ; Vol.26-10: 1746~1754
|Author||Seonki Lee, Sang Hyun Lee, Kibaek Lee, Hyeokpil Kwon, Chang Hyun Nahm, Chung-Hak Lee, Pyung-Kyu Park, Kwang-Ho Choo, Jung-Kee Lee, Hyun-Suk Oh|
|Place of duty||School of Chemical and Biological Engineering, Seoul National University, Seoul 08826, Republic of Korea|
|Title||Effect of the Shape and Size of Quorum-Quenching Media on Biofouling Control in Membrane Bioreactors for Wastewater Treatment|
J. Microbiol. Biotechnol.2016 ;
|Abstract||Recently, spherical beads entrapping quorum quenching (QQ) bacteria have been reported as
effective moving QQ-media for biofouling control in MBRs for wastewater treatment owing to
their combined effects of biological (i.e., quorum quenching) and physical washing. Taking
into account both the mass transfer of signal molecules through the QQ-medium and collision
efficiencies of the QQ-medium against the filtration membranes in a bioreactor, a cylindrical
medium (QQ-cylinder) was developed as a new shape of moving QQ-medium. The QQcylinders
were compared with previous QQ-beads in terms of the QQ activity and the physical
washing effect under identical loading volumes of each medium in batch tests. It was found
that the QQ activity of a QQ-medium was highly dependent on its specific surface area,
regardless of the shape of the medium. In contrast, the physical washing effect of a QQmedium
was greatly affected by its geometric structure. The enhanced anti-biofouling
property of the QQ-cylinders relative to QQ-beads was confirmed in a continuous laboratoryscale
MBR with a flat-sheet membrane module.|
|Key_word||Membrane bioreactor, Quorum sensing, Quorum quenching, Bead, Cylinder|
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