Detachment of multi species biofilm in circulating fluidized bed bioreactor

Ajay Patel, George Nakhla, Jingxu Zhu

Research output: Journal PublicationArticlepeer-review

37 Citations (Scopus)


In this study, the detachment rates of various microbial species from the aerobic and anoxic biofilms in a circulating fluidized bed bioreactor (CFBB) with two entirely separate aerobic and anoxic beds were investigated. Overall detachment rate coefficients for biomass, determined on the basis of volatile suspended solids (VSS), glucose and protein as well as for specific microbial groups, i.e., for nitrifiers, denitrifiers, and phosphorous accumulating organisms (PAOs), were established. Biomass detachment rates were found to increase with biomass attachment on carrier media in both beds. The detachment rate coefficients based on VSS were significantly affected by shear stress, whereas for protein, glucose and specific microbial groups, no significant effect of shear stress was observed. High detachment rates were observed for the more porous biofilm structure. The presence of nitrifiers in the anoxic biofilm and denitrifiers in the aerobic biofilm was established by the specific activity measurements. Detachment rates of PAOs in aerobic and anoxic biofilms were evaluated.

Original languageEnglish
Pages (from-to)427-437
Number of pages11
JournalBiotechnology and Bioengineering
Issue number4
Publication statusPublished - 20 Nov 2005
Externally publishedYes


  • Biofilm
  • Circulating fluidized bed bioreactor
  • Detachment rate coefficient
  • Specific microbial activity

ASJC Scopus subject areas

  • Biotechnology
  • Bioengineering
  • Applied Microbiology and Biotechnology


Dive into the research topics of 'Detachment of multi species biofilm in circulating fluidized bed bioreactor'. Together they form a unique fingerprint.

Cite this