Membrane biofouling behaviors at cold temperatures in pilot-scale hollow fiber membrane bioreactors with quorum quenching

Kibaek Lee, Jun Seong Park, Tahir Iqbal, Chang Hyun Nahm, Pyung Kyu Park, Kwang Ho Choo

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

In this study, the seasonality of the biofouling behavior of pilot-scale membrane bioreactors (MBRs) run in parallel with vacant sheets and quorum quenching (QQ) sheets using real municipal wastewater was investigated. QQ media delayed fouling, but low temperatures caused severe biofouling. The greater amount of extracellular polymeric substances (EPSs) produced in cold weather was responsible for the faster biofouling of a membrane, even with QQ media. There were significant negative relationships between EPS levels and water temperature. Cold weather was detrimental to the degradation of quorum sensing signal molecules by QQ sheets, whose activity was restored with a higher dose of QQ bacteria. The QQ bacteria in the sheets experienced a slight loss in activity during the early stage of the field test, but survived in the pilot-scale MBR fed with real wastewater. There were no significant discrepancies in treatment efficiency among conventional, vacant, and QQ MBRs.

Original languageEnglish
Pages (from-to)912-924
Number of pages13
JournalBiofouling
Volume34
Issue number8
DOIs
Publication statusPublished - 2018 Sep 14

All Science Journal Classification (ASJC) codes

  • Aquatic Science
  • Applied Microbiology and Biotechnology
  • Water Science and Technology

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