Hydrodynamics and mass transfer coefficients in a bubble column photo-bioreactor

Manjrekar, Onkar N.; Sun, Yujian; He, Lian; Tang, Yinjie J.; Duduković, Milorad P.

doi:10.1016/j.ces.2017.04.016

Cited by 37 publications

(23 citation statements)

References 55 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The correlations were obtained by fitting all the gas holdup and k L a data determined using ideal, non-ideal pressure step, air and pure oxygen absorption. [17] and by Manjrekar (2017) [5] for low gas flow rates (u G < 0.03 m/s). Both studies report results of experiments performed in bubble columns equipped with perforated plate and their hydrodynamic conditions were probably comparable with ours.…”

Section: Discussionmentioning

confidence: 99%

“…A special case of the standard dynamic method is the "oxygen-enriched method" [5,17] where air is exchanged with oxygen enriched air (oxygen concentration increased by ca. 3%).…”

Section: Introductionmentioning

confidence: 99%

“…Kantarci (2005) [2] reviewed several biochemical studies using bubble columns as bioreactors to produce various products, such as enzymes, proteins, antibiotics, etc. Nowadays, bubble columns are studied as an efficient photo-bioreactor for production of microalgae [5][6][7]. The supply of gas to the liquid is a crucial process to keep microorganisms alive and the knowledge of gas-liquid mass transfer rate is an important design and scale-up parameter determining the reactor efficiency [2,8].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Measurement of Volumetric Mass Transfer Coefficient in Bubble Columns

et al. 2018

View full text Add to dashboard Cite

Abstract:The paper presents a brief overview of experiments on volumetric mass transfer coefficient in bubble columns. The available experimental data published are often incomparable due to the different type of gas distributor and different operating conditions used by various authors. Moreover, the value of the coefficient obtained experimentally is very sensitive to the particular method and to the physical models used in its evaluation. It follows that the Dynamic Pressure Method (DPM) is able to provide physically correct values not only in lab-scale contactors but also in pilot-scale reactors. However, the method was not correctly proven in bubble columns. In present experiments, DPM was employed in a laboratory-scale bubble column with a coalescent phase and tested in the pure heterogeneous flow regime. The method was successfully validated by the measurements under two different conditions relevant to the mass transfer. First, the ideal pressure step was compared with the non-ideal pressure step. Second, the pure oxygen absorption was compared with the simultaneous oxygen-and-nitrogen absorption. The obtained results proved that DPM is suitable for measuring the mass transport in bubble columns and to provide reliable data of volumetric mass transfer coefficient.

show abstract

Section: Discussionmentioning

confidence: 99%

“…A special case of the standard dynamic method is the "oxygen-enriched method" [5,17] where air is exchanged with oxygen enriched air (oxygen concentration increased by ca. 3%).…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Measurement of Volumetric Mass Transfer Coefficient in Bubble Columns

et al. 2018

View full text Add to dashboard Cite

show abstract

“…The twodimensional (2-D) projections of the bubbles are shaped like ellipses and circles. 49 The diameter of the bubbles in the imaging measurement is defined as d5 1 n P n i51 d i , where d i 52…”

Section: Bubble Imagingmentioning

confidence: 99%

Bubble‐separation dynamics in a planar cyclone: Experiments and CFD simulations

Qian

et al. 2018

AIChE Journal

View full text Add to dashboard Cite

A planar cyclone is designed for visualizing bubbles in the cross‐section of a degassing hydrocyclone. The pressure distribution is studied through a series of experiments and Reynolds stress model simulations. The velocity distribution of the planar cyclone mostly exhibits the quasi‐forced vortex zone and boundary layer zone. The bubble dynamics are simulated using both Euler‐Euler and Euler‐Lagrange approaches, and the output is compared with the imaging results. The Euler‐Euler simulation provides more accurate predictions of the bubble trajectory. The histograms of residence time and traveling distance given by the Euler‐Lagrange approach exhibit a reasonably regular pattern. With higher values of the inlet Reynolds number, stronger forces acting on the bubbles lead to a decreased but more uniform residence time. © 2018 American Institute of Chemical Engineers AIChE J, 64: 2689–2701, 2018

show abstract

“…Gas–liquid multiphase reactors, which are used to improve mass transfer, are commonly used in the form of stirred reactors, bubble columns, falling film reactors, jet flow, and airlift reactors . Taylor–Couette vortex bioreactors are prime examples of reactors that use inner wall rotation to generating the pairs of toroidal vortices.…”

Section: Introductionmentioning

confidence: 99%

Gas–liquid mass transfer and bubble size distribution in a multi‐Cyclone separator

Qian

et al. 2018

AIChE Journal

View full text Add to dashboard Cite

This article discusses the use of a multi-cyclone separator, which is a simplified form of a degassing hydrocyclone, in the separation of sweeping nitrogen bubbles and dissolved oxygen from water. The motion of the nitrogen bubbles and mass transfer of dissolved oxygen is discussed. It was observed that the Sauter mean diameter and gas volume in the swirling flow region as well as the total gas holdup increased as the volumetric ratio of gas to liquid flow increased. Almost all bubbles were found to exit through the gas outlet, indicating optimum performance of the bubble-separation process. The multi-cyclone separator was found to achieve good performance for the mass transfer of oxygen from water to nitrogen. This work is important in predicting the destination of bubbles and dissolved gas in swirling flow.

show abstract

Hydrodynamics and mass transfer coefficients in a bubble column photo-bioreactor

Cited by 37 publications

References 55 publications

Measurement of Volumetric Mass Transfer Coefficient in Bubble Columns

Measurement of Volumetric Mass Transfer Coefficient in Bubble Columns

Bubble‐separation dynamics in a planar cyclone: Experiments and CFD simulations

Gas–liquid mass transfer and bubble size distribution in a multi‐Cyclone separator

Contact Info

Product

Resources

About