Hydrodynamics of a gas–liquid–solid fluidised bed bioreactor with a low density biomass support

Sokól̵, Wl̵odzimierz; Halfani, M.R.

doi:10.1016/s1369-703x(99)00016-9

Cited by 22 publications

(29 citation statements)

References 13 publications

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“…With increasing V b , the value of u m increased. Thus, a large volume of the particles can lead to an increase in the amount of the air required for biomass growth, and consequently to an increase in the resulting energy cost [13].…”

Section: Resultsmentioning

confidence: 99%

“…This was possible because the reactor was operated at the ratios (V b /V R ) smaller than the critical values of (V b /V R ) cr [13]. At the ratios (V b /V R ) equal to, or larger than, (V b /V R ) cr , the movement of the whole bed was impossible: the particles either remained at the top of the reactor or they settled at its bottom.…”

Section: Treatment Operationmentioning

confidence: 99%

“…The application of a low density (matrix particle density smaller than that of liquid) biomass support in a reactor allows the control of biomass loading and provides the high oxygen concentration in the reacting liquid media [2,13].…”

Section: Introductionmentioning

confidence: 99%

“…Such type of fluidization is termed the inverse fluidization. Sokół and Halfani [13] have reported that a steadystate biomass loading was obtained in a FBBR, in which polypropylene particles of density 910 kg/m 3 were fluidized by an upward co-current flow of gas and liquid. Karamanev et al [14] have achieved a constant biomass loading in a FFBR, in which low density particles were fluidized by downflow of the liquid.…”

Section: Introductionmentioning

confidence: 99%

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Evaluation of the Inverse Fluidized Bed Biological Reactor for Treating High-Strength Industrial Wastewaters

Sokól̵¹,

Woldeyes²

2011

ACES

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The aim of this work was to investigate the aerobic degradation of high-strength industrial (refinery) wastewaters in the inverse fluidized bed biological reactor, in which polypropylene particles of density 910 kg/m 3 were fluidized by an upward flow of gas through a bed. Measurements of chemical oxygen demand (COD) versus residence time t were performed for various ratios of settled bed volume to reactor volume (V b /V R ) and air velocities u. The largest COD reduction, namely, from 54,840 to 2190 mg/l, i.e. a 96% COD decrease, was achieved when the reactor was operated at the ratio (V b /V R ) = 0.55, air velocity u = 0.046 m/s and t = 65 h. Thus, these values of (V b /V R ), u and t can be considered as the optimal operating parameters for a reactor when used in treatment of high-strength refinery wastewaters. In the treatment operation conducted in a reactor optimally controlled at (V b /V R ) = 0.55, u = 0.046 m/s and t = 65 h, the conversions obtained for all phenolic constituents of the wastewater were larger than 95%. The conversions of about 90% were attained for other hydrocarbons.

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Section: Resultsmentioning

confidence: 99%

Section: Treatment Operationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Evaluation of the Inverse Fluidized Bed Biological Reactor for Treating High-Strength Industrial Wastewaters

Sokól̵¹,

Woldeyes²

2011

ACES

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“…However, the excessive growth of biomass on the media can lead to washout of bioparticles (particles covered by biomass) from a reactor since the biomass loading can increase to such an extent that the bioparticles began to be carried over from the reactor [9,10]. The application of the inverse FBBR, in which a bed consisting of low density (matrix particle density smaller than that of liquid) particles expands downwards during fluidization, allows the control of biomass loading and provides the high oxygen concentration in the reacting liquid media [1,3].…”

Section: Introductionmentioning

confidence: 99%

Optimal Aerations in the Inverse Fluidized Bed Biofilm Reactor When Used in Treatment of Industrial Wastewaters of Various Strength

Sokól̵¹

2012

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Treatment of the refinery wastewater in a gas–liquid–solid three‐phase flow airlift loop bioreactor

Wen¹,

Yuan²,

Pan³

et al. 2005

J of Chemical Tech & Biotech

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Hydrodynamics of a gas–liquid–solid fluidised bed bioreactor with a low density biomass support

Cited by 22 publications

References 13 publications

Evaluation of the Inverse Fluidized Bed Biological Reactor for Treating High-Strength Industrial Wastewaters

Evaluation of the Inverse Fluidized Bed Biological Reactor for Treating High-Strength Industrial Wastewaters

Optimal Aerations in the Inverse Fluidized Bed Biofilm Reactor When Used in Treatment of Industrial Wastewaters of Various Strength

Treatment of the refinery wastewater in a gas–liquid–solid three‐phase flow airlift loop bioreactor

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