Double-deck aerated biofilm membrane bioreactor with sludge control for municipal wastewater treatment

Jirachote Phattaranawik*, Torove Leiknes

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

19 Scopus citations


Alternative designs of an aerated moving-bed biofilm reactor and a flat-sheet membrane module for a biofilm membrane bioreactor process have been investigated to overcome a membrane clogging problem and to determine the performance of a new membrane module. Double-deck aerated biofilm reactor with integrated designs of sludge hopper, thickener, and velocity-zone concept for particle settlement was evaluated for the suspended solid control and removal. Hydrodynamics of bubbling, liquid, and solid particles were arranged in the bioreactor to obtain a particle settlement. New membrane modules used under low suspended solid environment having smaller membrane gaps were evaluated for filtration performance and clogging problems for long-term operation. The average suspended solids concentration in the bioreactor effluent was 44.6 mg/L. Relaxation applied with the membrane module provided the most optimum result for fouling control, and no clogging problems in the modules were observed in the system after continuous operation of 3 weeks.

Original languageEnglish (US)
Pages (from-to)1291-1297
Number of pages7
JournalAIChE Journal
Issue number5
StatePublished - May 2009
Externally publishedYes


  • Biofilm membrane bioreactor
  • Bioreactor design
  • Flat sheet membrane modules
  • Moving-bed biofilm
  • Sludge control

ASJC Scopus subject areas

  • General Chemical Engineering
  • Biotechnology
  • Environmental Engineering


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