Steady state phenol degradation in a draft‐tube, gas‐liquid‐solid fluidized‐bed bioreactor

Tang, Wen-Tzung; Fan, Liang‐Shih

doi:10.1002/aic.690330210

Cited by 154 publications

(83 citation statements)

References 25 publications

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“…Much of this work has been carried out using phenol as a model toxic compound . 4,5,7,17,19,25,32 However, phenol is usually easily biodegradable:7 and so it is of interest to extend this work using a compound which is considered recalcitrant. Several mathematical models have been proposed which describe phenol degrading fluidized bed bioreactor s y~t e m s .…”

Section: Introductionmentioning

confidence: 98%

Biodegradation of 3,4‐dichloroaniline in a fluidized bed bioreactor and a steady‐state biofilm Kinetic model

Livingston

1991

Biotech & Bioengineering

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Mixed culture of microorganisms immobilized onto Celite diatomaceous earth particles were used to degrade 3,4-dichloroaniline (34DCA) in a three-phase draft tube fluidized bed bioreactor. Biodegradation was confirmed as the dominant removal mechanism by measurements of the concomitant chloride ion evolution. Degradation efficiencies of 95% were obtained at a reactor retention time of 1.25 h. A mathematical model was used to describe the simultaneous diffusion and reaction of 34DCA and oxygen in the biofilms on the particles in the reactor. The parameters describing freely suspended cell growth on 34DCA were obtained in batch experiments. The model was found to describe the system well for three out of four steady states and to predict qualitatively the experimentally observed transition in the biofilm kinetics from 34DCA to oxygen limitation.

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Section: Introductionmentioning

confidence: 98%

Biodegradation of 3,4‐dichloroaniline in a fluidized bed bioreactor and a steady‐state biofilm Kinetic model

Livingston

1991

Biotech & Bioengineering

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“…Andrews (1968) was the first to propose an equation to model substrate-inhibited microbial growth and his model provided a good fit to the experimental data and has been widely used particularly for wastewater treatment systems (Sokol, 1987;Grady & Lim, 1999;Tang & Fan, 1987;Rozich & Gaudy Jr, 1985;Goudar et al, 2000;Tan et al, 1996). Andrew's equation was basically an extension of the Monod model (Monod, 1949) where an additional substrate inhibition term has been included (S 2 /K I ).…”

Section: Introductionmentioning

confidence: 99%

Analysis of a Chemostat Model with Variable Yield Coefficient and Substrate Inhibition: Contois Growth Kinetics

Alqahtani

Nelson

Worthy

2014

Chemical Engineering Communications

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2015, Copyright Taylor & Francis Group, LLC.We analyze the steady-state operation of a generalized reactor model that encompasses a continuous flow bioreactor and an idealized continuous flow membrane reactor as limiting cases. The biochemical reaction kinetics is governed by a Contois growth model subject to noncompetitive substrate inhibition with a variable substrate yield coefficient. The steady-state performance of the reactor is predicted and stability of the steady-state solutions as a function of dimensionless residence time reported. Our results identified two cases of practical interest. The first feature corresponds to the case where solutions to both no-washout and washout conditions are bistable. The second feature identifies the parameter region in which periodic solutions can occur when the yield coefficient is not constant. Both these features are often undesirable in practical applications and must be avoided. Scaling of the model equations reveals that both the second-bifurcation parameters are functions of the influent concentration. Our results predict how the reactor behavior varies as a function of influent concentration and identify the range of influent concentrations where the reactor displays neither periodic nor bistable behavior.

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“…A review of numerous applications of fluidised bed bioreactors is given by Schügerl (1997). Airlift bioreactors with fine particles are also treated by many authors as special cases of fluidised-bed reactors (Tang and Fan, 1987a;Tang et al, 1987b).…”

Section: Introductionmentioning

confidence: 99%

“…• The usage of carriers in a form of small size particles allows continuous replenishment of the fluidised bed and enables to control the biofilm thickness (Tang and Fan, 1987a).…”

Section: Introductionmentioning

confidence: 99%

“…Both two-phase liquid-solid fluidised-bed bioreactors and three-phase apparatuses are commonly used in industry. These bioreactors are applied to the microbiological degradation of toxic organic compounds (Onysko et al, 2002;Tang and Fan, 1987a;Tang et al 1987b;Wisecarver and Fan, 1989;Worden and Donaldson, 1987), the microbiological nitrification process (Dunn et al, 1983), and the synthesis of some drugs, e.g. penicillin, oxytetracycline, and other organic compounds (Park et al, 1984).…”

Section: Introductionmentioning

confidence: 99%

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Mathematical Modelling and Stationary Characteristics of a Two-Phase Fluidised-Bed Bioreactor With External Aeration

Tabiś¹,

Stryjewski²

2013

Chemical and Process Engineering

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A mathematical model for a two-phase fluidised bed bioreactor with liquid recirculation and an external aerator was proposed. A stationary nonlinear analysis of such a bioreactor for an aerobic process with double-substrate kinetics was carried out. The influences of a volumetric fraction of solid carriers in the liquid phase, the rate of active biomass transfer from the biofilm to the liquid, the concentration of carbonaceous substrate, the mean residence time of the liquid and the efficiency of the external aerator on the steady state characteristics of the bioreactor were described. A method for determination of the minimal recirculation ratio related to oxygen demand and fluidised bed conditions was presented. On the basis of the obtained results, it is possible to choose reasonable operating conditions of such plants and to determine constraints, while considering acceptable concentrations of a toxic substrate being degraded.

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Steady state phenol degradation in a draft‐tube, gas‐liquid‐solid fluidized‐bed bioreactor

Cited by 154 publications

References 25 publications

Biodegradation of 3,4‐dichloroaniline in a fluidized bed bioreactor and a steady‐state biofilm Kinetic model

Biodegradation of 3,4‐dichloroaniline in a fluidized bed bioreactor and a steady‐state biofilm Kinetic model

Analysis of a Chemostat Model with Variable Yield Coefficient and Substrate Inhibition: Contois Growth Kinetics

Mathematical Modelling and Stationary Characteristics of a Two-Phase Fluidised-Bed Bioreactor With External Aeration

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