Effect of the shape and size of quorum-quenching media on biofouling control in membrane bioreactors for wastewater treatment

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

Research output: Contribution to journalArticle

14 Citations (Scopus)

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 QQ-cylinders 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 QQ-medium 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.

Original languageEnglish
Pages (from-to)1746-1754
Number of pages9
JournalJournal of microbiology and biotechnology
Volume26
Issue number10
DOIs
Publication statusPublished - 2016 Oct

All Science Journal Classification (ASJC) codes

  • Biotechnology
  • Applied Microbiology and Biotechnology

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