Hydrodynamics and mass transfer in a novel multi-airlifting membrane bioreactor

Xu, Zhe; Yu, Jian

doi:10.1016/j.ces.2007.12.026

Cited by 21 publications

(9 citation statements)

References 37 publications

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“…Comparison between measured and calculated values of oxygen concentration. 4. Considerably higher k L a values (up to 100%) can be seen in all liquid phases with SP, in comparison with SO.…”

Section: Influence Of the Membrane On The Volumetric Gas-liquid Mass mentioning

confidence: 86%

“…The increase of the hydrodynamic resistance led to an increase in the ε G and k L a. On the other hand, hydrodynamic resistance led to a decrease in W LD , but the impact of W LD on k L a was lower than ε G on k L a [4,9].…”

mentioning

confidence: 90%

“…They observed that the k L a was strongly affected by p-xylene and naphthalene and solid loadings. Xu and Yu [4] investigated the hydrodynamics in a novel multi-airlifting membrane bioreactor which was built with four sintered stainless steel tubular filters as the risers and downcomers. They showed that the k L a was primarily influenced by the gas holdup and the number of risers, and, to some extent, by the liquid velocity.…”

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confidence: 99%

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Volumetric gas-liquid mass transfer coefficient in an external-loop airlift reactor with inserted membrane

Kojić

Šijački

Lukić

et al. 2016

CI&CEQ

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The effects of the inserted membrane in the downcomer of an external-loop airlift reactor, the gas sparger type (single orifice and sinter plate) and added alcohol (ethanol, n-butanol, or n-hexanol) on the volumetric gas-liquid mass transfer coefficient (kLa) were studied. Due to the presence of the membrane in the downcomer, kLa did not change significantly; the differences were smaller than 10%. The highest values of the kLa were obtained using the sinter plate. It was found that the addition of small amounts of alcohol increased the mass transfer. Using our experimental results and the data of other authors, the feed-forward back propagation neural network for prediction of kLa in external-loop airlift reactors with alcohol solutions was proposed. [Projekat Ministarstva nauke Republike Srbije, br. 172025]

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Section: Influence Of the Membrane On The Volumetric Gas-liquid Mass mentioning

confidence: 86%

mentioning

confidence: 90%

mentioning

confidence: 99%

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Volumetric gas-liquid mass transfer coefficient in an external-loop airlift reactor with inserted membrane

Kojić

Šijački

Lukić

et al. 2016

CI&CEQ

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“…Recently, metal sintered membrane was applied in the eld of ltration and mixing. [26][27][28] It retains the superior characteristics of metal substrates, while possessing abundant microchannel architectures, large surface areas for gas-liquid contact, and great mass-transfer rates. 29,30 Considering the advantage of the metal sintered membrane, active Pt component was loaded into the microchannels of the metal sintered membrane, and the gas-liquid-solid catalytic reaction could transpire within the microchannels.…”

Section: Introductionmentioning

confidence: 99%

Preparation and catalytic performance of active metal sintered membrane reactor anchored with Pt atoms

et al. 2021

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“…Li et al (2008) developed an innovative single stage continuously aerated internal-loop membrane airlift bioreactor for simultaneous nitrification and denitrification of synthetic domestic wastewaters. Xu and Yu (2008) investigated the hydrodynamics of a novel multi-airlifting membrane bioreactor, constructed with four sintered stainless steel tubular filters serving as the risers and downcomers. In several studies the hydrodynamics in a draft tube airlift reactor with and without membrane have been simulated using computational fluid dynamics software (CFD) (Moraveji et al, 2012;Prieske et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

Hydrodynamics of an external-loop airlift reactor with inserted membrane

Kojić

Popović

Tokic

et al. 2017

Braz. J. Chem. Eng.

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-The objective of this study was to investigate the hydrodynamics of an external-loop airlift membrane reactor (ELAMR). The ELAMR was operated in two modes: without (mode A) and with bubbles in the downcomer (mode B), depending on the liquid level in the gas separator. The influence of the gas distributor's geometry and various alcohol solutions on the hydrodynamics of the ELAMR was studied. Results for the gas holdup and the downcomer liquid velocity are commented with respect to an external-loop airlift reactor of the same geometry but without the membrane in the downcomer (ELAR). Due to the presence of the membrane in the downcomer, acting as the local hydrodynamic resistance, the gas holdup in the riser of the ELAMR increases maximally by 16%, while the liquid velocity in the downcomer decreases up to 50%. The values of the gas holdup and liquid velocity predicted by the application of empirical power law correlations and a feed forward back propagation neural network (ANN) are in very good agreement with experimental values.

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Hydrodynamics and mass transfer in a novel multi-airlifting membrane bioreactor

Cited by 21 publications

References 37 publications

Volumetric gas-liquid mass transfer coefficient in an external-loop airlift reactor with inserted membrane

Volumetric gas-liquid mass transfer coefficient in an external-loop airlift reactor with inserted membrane

Preparation and catalytic performance of active metal sintered membrane reactor anchored with Pt atoms

Hydrodynamics of an external-loop airlift reactor with inserted membrane

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