Review of membrane aerated biofilm reactors

Casey, Eoin; Glennon, Brian; Hamer, G.

doi:10.1016/s0921-3449(99)00007-5

Cited by 126 publications

(65 citation statements)

References 44 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…One type of reactor used for simultaneous nitrification/denitrification was a membrane aerated biofilm reactor (MABR), which allows for aerobic nitrification and anoxic denitrification zones to occur within the single reactor (Casey, 1999). Aeration for the MABR was provided through hollow fiber membrane tubing to the bulk liquid of the reactor, and the outside surface of the tubing also acted as a carrier to immobilize the bacteria (Figure 2.6).…”

Section: Mabr Characteristicsmentioning

confidence: 99%

“…The air than penetrates through the membrane tubing into the biofilm that forms on the outer surface of the membrane. The bacteria in the biofilm consume the oxygen to oxidize pollutants diffusing from the bulk solution (Terada et al, 2003;Casey, 1999).…”

Section: Mabr Characteristicsmentioning

confidence: 99%

“…This includes three types: microporous hydrophobic membranes such as polypropylene, dense film membranes such as dimethylsiloxane (silicone), or composite membranes where a porous membrane is coated with a thin film of dense material (Casey, 1999). The microporous hydrophobic membrane mass transfer occurs by diffusion within the gasfilled pores.…”

Section: Mabr Tubingmentioning

confidence: 99%

“…Another drawback is the low bubble point of the membrane. This limits the maximum intramembrane pressure if bubble formation wants to be avoided (Casey, 1999). Dense film membrane transport mechanisms occur through solution diffusion, but the high permeability is due to the fact that some compounds, oxygen especially, have solubility four of five times more soluble in silicone than in water.…”

Section: Mabr Tubingmentioning

confidence: 99%

“…Other benefits of using dense membranes include their ability to withstand pressures up to 43.5 pounds per square inch (psi), and their high resistance to chemicals and mechanical stress. Also, the high density membrane is also less likely to have pore clogging and liquidity entry as does the microporous membranes (Casey, 1999). The composite membrane uses a 1 µm thick polymer coating on a microporous membrane with pore sizes ranging between 0.04 and 1.0 µm.…”

Section: Mabr Tubingmentioning

confidence: 99%

See 4 more Smart Citations

Simultaneous Nitrification and Denitrification of Wastewater Using a Silicone Membrane Aerated Bioreactor

Waltz¹

View full text Add to dashboard Cite

Section: Mabr Characteristicsmentioning

confidence: 99%

Section: Mabr Characteristicsmentioning

confidence: 99%

Section: Mabr Tubingmentioning

confidence: 99%

Section: Mabr Tubingmentioning

confidence: 99%

Section: Mabr Tubingmentioning

confidence: 99%

See 3 more Smart Citations

Simultaneous Nitrification and Denitrification of Wastewater Using a Silicone Membrane Aerated Bioreactor

Waltz¹

View full text Add to dashboard Cite

Biofilm development in a membrane-aerated biofilm reactor: Effect of flow velocity on performance

Casey

Glennon

Hamer

2000

Biotechnol. Bioeng.

View full text Add to dashboard Cite

The effect of liquid flow velocity on biofilm development in a membrane‐aerated biofilm reactor was investigated both by mathematical modeling and by experiment, using Vibrio natriegens as a test organism and acetate as carbon substrate. It was shown that velocity influenced mass transfer in the diffusion boundary layer, the biomass detachment rate from the biofilm, and the maximum biofilm thickness attained. Values of the overall mass transfer coefficient of a tracer through the diffusion boundary layer, the biofilm, and the membrane were shown to be identical during different experiments at the maximum biofilm thickness. Comparison of the results with published values of this parameter in membrane attached biofilms showed a similar trend. Therefore, it was postulated that this result might indicate the mechanism that determines the maximum biofilm thickness in membrane attached biofilms. In a series of experiments, where conditions were set so that the active layer of the membrane attached biofilm was located close to the membrane biofilm interface, it was shown that the most critical effect on process performance was the effect of velocity on biofilm structure. Biofilm thickness and effective diffusivity influenced reaction and diffusion in a complex manner such that the yield of biomass on acetate was highly variable. Consideration of endogenous respiration in the mathematical model was validated by direct experimental measurements of yield coefficients. Good agreement between experimental measurements of acetate and oxygen uptake rates and their prediction by the mathematical model was achieved. © 2000 John Wiley & Sons, Inc. Biotechnol Bioeng 67: 476–486, 2000.

show abstract

Biofilm development in a membrane-aerated biofilm reactor: Effect of flow velocity on performance

Casey¹,

Glennon²,

Hamer³

2000

Biotechnol. Bioeng.

View full text Add to dashboard Cite

The effect of liquid flow velocity on biofilm development in a membrane-aerated biofilm reactor was investigated both by mathematical modeling and by experiment, using Vibrio natriegens as a test organism and acetate as carbon substrate. It was shown that velocity influenced mass transfer in the diffusion boundary layer, the biomass detachment rate from the biofilm, and the maximum biofilm thickness attained. Values of the overall mass transfer coefficient of a tracer through the diffusion boundary layer, the biofilm, and the membrane were shown to be identical during different experiments at the maximum biofilm thickness. Comparison of the results with published values of this parameter in membrane attached biofilms showed a similar trend. Therefore, it was postulated that this result might indicate the mechanism that determines the maximum biofilm thickness in membrane attached biofilms. In a series of experiments, where conditions were set so that the active layer of the membrane attached biofilm was located close to the membrane biofilm interface, it was shown that the most critical effect on process performance was the effect of velocity on biofilm structure. Biofilm thickness and effective diffusivity influenced reaction and diffusion in a complex manner such that the yield of biomass on acetate was highly variable. Consideration of endogenous respiration in the mathematical model was validated by direct experimental measurements of yield coefficients. Good agreement between experimental measurements of acetate and oxygen uptake rates and their prediction by the mathematical model was achieved.

show abstract

Review of membrane aerated biofilm reactors

Cited by 126 publications

References 44 publications

Simultaneous Nitrification and Denitrification of Wastewater Using a Silicone Membrane Aerated Bioreactor

Simultaneous Nitrification and Denitrification of Wastewater Using a Silicone Membrane Aerated Bioreactor

Biofilm development in a membrane-aerated biofilm reactor: Effect of flow velocity on performance

Biofilm development in a membrane-aerated biofilm reactor: Effect of flow velocity on performance

Contact Info

Product

Resources

About