Validation of a full-scale membrane bioreactor and the impact of membrane cleaning on the removal of microbial indicators

Ben van den Akker, Trang Trinh, Heather Coleman, Richard M. Stuetz, Pierre Le-Clech, Stuart J. Khan

Research output: Contribution to journalArticle

26 Citations (Scopus)

Abstract

The removal of microbial indicators through a full-scale membrane bioreactor (MBR) was characterised.The overall log reduction of Escherichia coli and total coliforms were in the range of 5.0–5.9 log10 units,while the reduction of clostridia was marginally less at 4.9 log10 units. Removal of bacteriophage wasin excess of 4.6 log10 units. The impact of membrane cleaning on the elimination of microbial indicatorswas also assessed since this had been identified by pilot-scale studies as a potential hazardous event.Membrane cleaning temporarily reduced the log removal values of E. coli and total coliforms each by1 log10 unit, but did not affect the removal of bacteriophage or clostridia. Very little research has previouslyexamined the consequences of hazardous events on the performance of full-scale MBRs, and thusthe findings presented here will facilitate improvements for the risk assessment and management ofMBRs used in water recycling schemes.
Original languageEnglish
Pages (from-to)432-437
JournalBioresource Technology
Volume155
Early online date8 Jan 2014
DOIs
Publication statusE-pub ahead of print - 8 Jan 2014

Keywords

  • Membrane bioreactor
  • Log removal
  • Microbial indicators
  • Membrane cleaning
  • Risk assessment

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