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 language | English |
|---|---|
| Pages (from-to) | 229-235 |
| Number of pages | 7 |
| Journal | Water Science and Technology |
| Volume | 36 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 1997 |
| Externally published | Yes |
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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 journal › Article
}
TY - JOUR
T1 - Mechanisms of biofilm detachment in fluidized bed reactors
AU - Nicolella, Cristiano
AU - Chiarle, Stefania
AU - Di Felice, Renzo
AU - Rovatti, Mauro
PY - 1997
Y1 - 1997
N2 - 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.
AB - 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.
KW - Biofilm
KW - Detachment
KW - Dimensional analysis
KW - Fluidized bed
UR - http://www.scopus.com/inward/record.url?scp=0030763764&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0030763764&partnerID=8YFLogxK
U2 - 10.1016/S0273-1223(97)00329-6
DO - 10.1016/S0273-1223(97)00329-6
M3 - Article
VL - 36
SP - 229
EP - 235
JO - Water Science and Technology
JF - Water Science and Technology
SN - 0273-1223
IS - 1
ER -