Flow Characteristics in an Airlift Membrane Bioreactor
-
Amirhossein Khalili
Effect of changing the liquid level in an airlift membrane bioreactor of 0.7 m height, 0.24 m width and 0.18 m depth was studied both experimentally and by simulation. Three-dimensional simulations of the airlift membrane bioreactor were carried out at two different liquid levels above the membrane. The simulations were based on the two-fluid model with the standard k–? model for the turbulence. The results showed that by lowering the liquid level, the quality of mixing and uniformity of the velocity distribution of liquid phase in the riser would be improved while the shear stress on the membrane surface would be reduced. Higher shear stress on the membrane surface at high levels of liquid minimizes the extent to which particles settle on the membrane, thus, fouling will be reduced and flux of liquid through membrane will be enhanced. Moreover, it was shown that by lowering the liquid level, the fraction of air in the downcomers becomes lower.
©2011 Walter de Gruyter GmbH & Co. KG, Berlin/Boston
Articles in the same Issue
- Article
- Editorial: Special Issue of 8th World Congress of Chemical Engineering (WCCE 8) Symposium on Process Design
- Reactive Dividing-Wall Columns - Defying Equilibrium Restrictions
- Fractal Scaling in Crude Oil Price Evolution via Time Series Analysis of Historical Data
- Effect of Sound Wave Irradiation on Methane Conversion in DC Pulse Discharge Plasma
- The Production of Polyhydroxyalkanoates Using an Oscillatory Baffled Bioreactor
- Simultaneous Coke Reduction with Improved Syngas Production during Propane Steam Reforming using Forced CO2 Cycling
- Kernel PCA Performance in Processes with Multiple Operation Modes
- A New Kinetic Model for 4-Chlorophenol Adsorption on Expanded Clay
- Uniformly Bounded Error Estimator for Bioprocess with Unstructured Cell Growth Models
- Mathematical Modeling of Drug Release from Spherical Drug Particles: Analysis of the Effect of Absorption Rate on Drug Release Rate
- Analysis on a Counter-Current Flow Hemodialyzer
- Mathematical Model of a Falling Film Reactor for Methyl Ester Sulfonation
- Oxidative Coupling of Propane with a Two-Layered Catalyst Bed Reactor
- Interval Based MINLP Superstructure Synthesis of Multi-Period Mass Exchanger Networks
- Modeling Fluid Separation Processes Using a Complementary Approach
- Compartmental Modeling of an Industrial Column
- Recrystallization of Caffeine Using Supercritical Carbon Dioxide as Antisolvent
- Flow Characteristics in an Airlift Membrane Bioreactor
- Design and Control of Integrated Styrene-Aniline Production Plant
Articles in the same Issue
- Article
- Editorial: Special Issue of 8th World Congress of Chemical Engineering (WCCE 8) Symposium on Process Design
- Reactive Dividing-Wall Columns - Defying Equilibrium Restrictions
- Fractal Scaling in Crude Oil Price Evolution via Time Series Analysis of Historical Data
- Effect of Sound Wave Irradiation on Methane Conversion in DC Pulse Discharge Plasma
- The Production of Polyhydroxyalkanoates Using an Oscillatory Baffled Bioreactor
- Simultaneous Coke Reduction with Improved Syngas Production during Propane Steam Reforming using Forced CO2 Cycling
- Kernel PCA Performance in Processes with Multiple Operation Modes
- A New Kinetic Model for 4-Chlorophenol Adsorption on Expanded Clay
- Uniformly Bounded Error Estimator for Bioprocess with Unstructured Cell Growth Models
- Mathematical Modeling of Drug Release from Spherical Drug Particles: Analysis of the Effect of Absorption Rate on Drug Release Rate
- Analysis on a Counter-Current Flow Hemodialyzer
- Mathematical Model of a Falling Film Reactor for Methyl Ester Sulfonation
- Oxidative Coupling of Propane with a Two-Layered Catalyst Bed Reactor
- Interval Based MINLP Superstructure Synthesis of Multi-Period Mass Exchanger Networks
- Modeling Fluid Separation Processes Using a Complementary Approach
- Compartmental Modeling of an Industrial Column
- Recrystallization of Caffeine Using Supercritical Carbon Dioxide as Antisolvent
- Flow Characteristics in an Airlift Membrane Bioreactor
- Design and Control of Integrated Styrene-Aniline Production Plant
