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 M. Coleman, Richard M. Stuetz, Pierre Le-Clech, Stuart J. Khan

Research output: Contribution to journalArticlepeer-review

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 5.0-5.9log10 units, while the reduction of clostridia was marginally less at 4.9log10 units. Removal of bacteriophage was in excess of 4.6log10 units. The impact of membrane cleaning on the elimination of microbial indicators was 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 by 1log10 unit, but did not affect the removal of bacteriophage or clostridia. Very little research has previously examined the consequences of hazardous events on the performance of full-scale MBRs, and thus the findings presented here will facilitate improvements for the risk assessment and management of MBRs used in water recycling schemes.

Original languageEnglish
Pages (from-to)432-437
Number of pages6
JournalBioresource Technology
Volume155
Early online date8 Jan 2014
DOIs
Publication statusPublished - Mar 2014
Externally publishedYes

Keywords

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

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