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Analysis of shear stress and energy consumption in a tubular airlift membrane system

Nicolas Rios Ratkovich UGent, CCV Chan, PR Berube and Ingmar Nopens UGent (2011) WATER SCIENCE AND TECHNOLOGY. 64(1). p.189-198
abstract
Application of a two-phase slug flow in side-stream membrane bioreactors (MBRs) has proven to increase the permeate flux and decrease fouling through a better control of the cake layer. Past literature has shown that the hydrodynamics near the membrane surface have an impact on the degree of fouling by imposing high shear stress near the surface of the membrane. Previously, shear stress histograms (SSH) have been introduced to summarize results from an experimental setup developed to investigate the shear stress imposed on the surface of a membrane under different two-phase flow conditions (gas and liquid) by varying the flow of each phase. Bimodal SSHs were observed, with peaks corresponding to the shear induced by the liquid and gas flow respectively. In this contribution, SSHs are modelled using simple empirical relationships. These are used to identify the two-phase flow conditions that optimize fouling control. Furthermore, the total energy consumption of the system was estimated based on the two-phase pressure drop. It was found that low liquid and high gas flow rates (ratio of approx. 4) balanced the peaks and minimized the energy consumption.
Please use this url to cite or link to this publication:
author
organization
year
type
journalArticle (original)
publication status
published
subject
keyword
gas-liquid slug flow, energy consumption, pressure drop, side-stream membrane bioreactor, wall shear stress, SLUG FLOW, HYDRODYNAMIC CHARACTERISTICS, ULTRAFILTRATION, FILTRATION, MODULE, TUBES
journal title
WATER SCIENCE AND TECHNOLOGY
Water Sci. Technol.
volume
64
issue
1
pages
189 - 198
Web of Science type
Article
Web of Science id
000293070600025
JCR category
WATER RESOURCES
JCR impact factor
1.122 (2011)
JCR rank
38/78 (2011)
JCR quartile
2 (2011)
ISSN
0273-1223
DOI
10.2166/wst.2011.521
language
English
UGent publication?
yes
classification
A1
copyright statement
I have transferred the copyright for this publication to the publisher
id
1922250
handle
http://hdl.handle.net/1854/LU-1922250
date created
2011-10-07 10:02:28
date last changed
2011-10-07 10:13:17
@article{1922250,
  abstract     = {Application of a two-phase slug flow in side-stream membrane bioreactors (MBRs) has proven to increase the permeate flux and decrease fouling through a better control of the cake layer. Past literature has shown that the hydrodynamics near the membrane surface have an impact on the degree of fouling by imposing high shear stress near the surface of the membrane. Previously, shear stress histograms (SSH) have been introduced to summarize results from an experimental setup developed to investigate the shear stress imposed on the surface of a membrane under different two-phase flow conditions (gas and liquid) by varying the flow of each phase. Bimodal SSHs were observed, with peaks corresponding to the shear induced by the liquid and gas flow respectively. In this contribution, SSHs are modelled using simple empirical relationships. These are used to identify the two-phase flow conditions that optimize fouling control. Furthermore, the total energy consumption of the system was estimated based on the two-phase pressure drop. It was found that low liquid and high gas flow rates (ratio of approx. 4) balanced the peaks and minimized the energy consumption.},
  author       = {Rios Ratkovich, Nicolas and Chan, CCV and Berube, PR and Nopens, Ingmar},
  issn         = {0273-1223},
  journal      = {WATER SCIENCE AND TECHNOLOGY},
  keyword      = {gas-liquid slug flow,energy consumption,pressure drop,side-stream membrane bioreactor,wall shear stress,SLUG FLOW,HYDRODYNAMIC CHARACTERISTICS,ULTRAFILTRATION,FILTRATION,MODULE,TUBES},
  language     = {eng},
  number       = {1},
  pages        = {189--198},
  title        = {Analysis of shear stress and energy consumption in a tubular airlift membrane system},
  url          = {http://dx.doi.org/10.2166/wst.2011.521},
  volume       = {64},
  year         = {2011},
}

Chicago
Rios Ratkovich, Nicolas, CCV Chan, PR Berube, and Ingmar Nopens. 2011. “Analysis of Shear Stress and Energy Consumption in a Tubular Airlift Membrane System.” Water Science and Technology 64 (1): 189–198.
APA
Rios Ratkovich, N., Chan, C., Berube, P., & Nopens, I. (2011). Analysis of shear stress and energy consumption in a tubular airlift membrane system. WATER SCIENCE AND TECHNOLOGY, 64(1), 189–198.
Vancouver
1.
Rios Ratkovich N, Chan C, Berube P, Nopens I. Analysis of shear stress and energy consumption in a tubular airlift membrane system. WATER SCIENCE AND TECHNOLOGY. 2011;64(1):189–98.
MLA
Rios Ratkovich, Nicolas, CCV Chan, PR Berube, et al. “Analysis of Shear Stress and Energy Consumption in a Tubular Airlift Membrane System.” WATER SCIENCE AND TECHNOLOGY 64.1 (2011): 189–198. Print.