Two-stage biofilm-MBR for nitrogen removal and enhanced membrane performance

Cheng Sun*, Tor Ove Leiknes

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

3 Scopus citations


A two-stage biofilm-membrane bioreactor (MBR) was developed in this study. High total nitrogen removal (maximum: 81.4% with recycle ratio = 3.5) was observed by recycling the suspension liquid between an anaerobic FBBR and an aerobic MBBR. Very low (less than 60 mg/L) suspended solids was kept in the membrane unit, which could improve the membrane filtration performance. Membrane fouling was further reduced by increasing the recycle ratio. When influent organic load increased, the membrane fouling rate increased, coupling with higher FCOD and suspended solids (SS) values in the feed solution around the membrane.

Original languageEnglish (US)
Pages (from-to)588-593
Number of pages6
JournalWater Science and Technology
Issue number3
StatePublished - 2012
Externally publishedYes


  • Biofilm-MBR
  • FCOD
  • Membrane
  • Recycle ratio
  • TN

ASJC Scopus subject areas

  • Environmental Engineering
  • Water Science and Technology


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