Mechanisms of biofilm detachment in fluidized bed reactors

Cristiano Nicolella, Stefania Chiarle, Renzo Di Felice, Mauro Rovatti

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

Biofilm detachment in liquid fluidized bed biological reactors was investigated to point out how different mechanisms influence the process. Erosion due to liquid shear and abrasion due to collisions of particles were considered as possible mechanisms of biomass detachment in liquid fluidized beds. A dimensional analysis technique allowed the identification of the significant parameters affecting the process. The influence of these parameters was established on a lab-scale reactor. An empirical model was proposed to correlate the experimental data and to analyze the effect of some characteristic quantities, such as particle Reynolds number, biomass fraction, liquid shear stress and solid concentration, on the detachment rate. Detachment rate strongly increased with fluid velocity while, owing to modifications in biofilm structure and morphology during the biological growth, it slightly decreased with liquid shear stress.

Original languageEnglish
Pages (from-to)229-235
Number of pages7
JournalWater Science and Technology
Volume36
Issue number1
DOIs
Publication statusPublished - 1997
Externally publishedYes

Fingerprint

Biofilms
Fluidized beds
biofilm
liquid
Liquids
shear stress
Shear stress
Biomass
biomass
abrasion
Abrasion
Reynolds number
Erosion
collision
reactor
erosion
Fluids
fluid
parameter
particle

Keywords

  • Biofilm
  • Detachment
  • Dimensional analysis
  • Fluidized bed

ASJC Scopus subject areas

  • Water Science and Technology

Cite this

Mechanisms of biofilm detachment in fluidized bed reactors. / Nicolella, Cristiano; Chiarle, Stefania; Di Felice, Renzo; Rovatti, Mauro.

In: Water Science and Technology, Vol. 36, No. 1, 1997, p. 229-235.

Research output: Contribution to journalArticle

Nicolella, C, Chiarle, S, Di Felice, R & Rovatti, M 1997, 'Mechanisms of biofilm detachment in fluidized bed reactors', Water Science and Technology, vol. 36, no. 1, pp. 229-235. https://doi.org/10.1016/S0273-1223(97)00329-6
Nicolella, Cristiano ; Chiarle, Stefania ; Di Felice, Renzo ; Rovatti, Mauro. / Mechanisms of biofilm detachment in fluidized bed reactors. In: Water Science and Technology. 1997 ; Vol. 36, No. 1. pp. 229-235.
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