Effect of media volume on mixing of biological aerated filters

Fatihah Suja`, T. Donnelly

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Effect of reduced media volume on the mixing of biological aerated filters (BAF) was quantitatively determined. The degree of mixing was evaluated based on Reynolds numbers (Re) while the nonideality of the flow was assessed from information of residence time distribution. At HRTs of 1411, 1111, 781 and 581 min and their, respectively, approximate OLRs of 2, 3, 4, and 6 kg COD m -3 d-1, the Re in the partial-bed were 40300, 36100. 25500. and 40400, respectively, whilst those of the full-bed were 19500, 20500, 11700, and 26400. Porosity of the BAF is a bed characteristic resulting from the balance between the effect of biomass accumulation due to growth and biomass loss due to shear stress, arising from increased organic loadings, gas flow, and increased upflow velocity. The number of tanks, calculated from the residence time distribution data, is either 1 or 2 (rounded up to an integer). This indicates the occurrence of a completely mixed pattern inside both reactors.

Original languageEnglish
Pages (from-to)229-236
Number of pages8
JournalJournal of Environmental Engineering and Science
Volume7
Issue number3
DOIs
Publication statusPublished - May 2008

Fingerprint

Residence time distribution
residence time
Biomass
filter
biomass
gas flow
Reynolds number
shear stress
Flow of gases
Shear stress
Porosity
porosity
distribution
effect
reactor
loss

Keywords

  • Biological aerated filters
  • Dead volumes
  • Mixing
  • Residence time distribution
  • Reynolds number

ASJC Scopus subject areas

  • Environmental Chemistry
  • Environmental Engineering

Cite this

Effect of media volume on mixing of biological aerated filters. / Suja`, Fatihah; Donnelly, T.

In: Journal of Environmental Engineering and Science, Vol. 7, No. 3, 05.2008, p. 229-236.

Research output: Contribution to journalArticle

@article{e4e2e58380344a7b9d4647972e47e958,
title = "Effect of media volume on mixing of biological aerated filters",
abstract = "Effect of reduced media volume on the mixing of biological aerated filters (BAF) was quantitatively determined. The degree of mixing was evaluated based on Reynolds numbers (Re) while the nonideality of the flow was assessed from information of residence time distribution. At HRTs of 1411, 1111, 781 and 581 min and their, respectively, approximate OLRs of 2, 3, 4, and 6 kg COD m -3 d-1, the Re in the partial-bed were 40300, 36100. 25500. and 40400, respectively, whilst those of the full-bed were 19500, 20500, 11700, and 26400. Porosity of the BAF is a bed characteristic resulting from the balance between the effect of biomass accumulation due to growth and biomass loss due to shear stress, arising from increased organic loadings, gas flow, and increased upflow velocity. The number of tanks, calculated from the residence time distribution data, is either 1 or 2 (rounded up to an integer). This indicates the occurrence of a completely mixed pattern inside both reactors.",
keywords = "Biological aerated filters, Dead volumes, Mixing, Residence time distribution, Reynolds number",
author = "Fatihah Suja` and T. Donnelly",
year = "2008",
month = "5",
doi = "10.1139/S07-048",
language = "English",
volume = "7",
pages = "229--236",
journal = "Journal of Environmental Engineering and Science",
issn = "1496-2551",
publisher = "National Research Council",
number = "3",

}

TY - JOUR

T1 - Effect of media volume on mixing of biological aerated filters

AU - Suja`, Fatihah

AU - Donnelly, T.

PY - 2008/5

Y1 - 2008/5

N2 - Effect of reduced media volume on the mixing of biological aerated filters (BAF) was quantitatively determined. The degree of mixing was evaluated based on Reynolds numbers (Re) while the nonideality of the flow was assessed from information of residence time distribution. At HRTs of 1411, 1111, 781 and 581 min and their, respectively, approximate OLRs of 2, 3, 4, and 6 kg COD m -3 d-1, the Re in the partial-bed were 40300, 36100. 25500. and 40400, respectively, whilst those of the full-bed were 19500, 20500, 11700, and 26400. Porosity of the BAF is a bed characteristic resulting from the balance between the effect of biomass accumulation due to growth and biomass loss due to shear stress, arising from increased organic loadings, gas flow, and increased upflow velocity. The number of tanks, calculated from the residence time distribution data, is either 1 or 2 (rounded up to an integer). This indicates the occurrence of a completely mixed pattern inside both reactors.

AB - Effect of reduced media volume on the mixing of biological aerated filters (BAF) was quantitatively determined. The degree of mixing was evaluated based on Reynolds numbers (Re) while the nonideality of the flow was assessed from information of residence time distribution. At HRTs of 1411, 1111, 781 and 581 min and their, respectively, approximate OLRs of 2, 3, 4, and 6 kg COD m -3 d-1, the Re in the partial-bed were 40300, 36100. 25500. and 40400, respectively, whilst those of the full-bed were 19500, 20500, 11700, and 26400. Porosity of the BAF is a bed characteristic resulting from the balance between the effect of biomass accumulation due to growth and biomass loss due to shear stress, arising from increased organic loadings, gas flow, and increased upflow velocity. The number of tanks, calculated from the residence time distribution data, is either 1 or 2 (rounded up to an integer). This indicates the occurrence of a completely mixed pattern inside both reactors.

KW - Biological aerated filters

KW - Dead volumes

KW - Mixing

KW - Residence time distribution

KW - Reynolds number

UR - http://www.scopus.com/inward/record.url?scp=43949091434&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=43949091434&partnerID=8YFLogxK

U2 - 10.1139/S07-048

DO - 10.1139/S07-048

M3 - Article

AN - SCOPUS:43949091434

VL - 7

SP - 229

EP - 236

JO - Journal of Environmental Engineering and Science

JF - Journal of Environmental Engineering and Science

SN - 1496-2551

IS - 3

ER -