A fundamental analysis of continuous flow bioreactor models and membrane reactor models to process industrial wastewaters

Nelson, Mark; Balakrishnan, E.; Sidhu, Harjeet S; Chen, Xiao

doi:10.1016/j.cej.2007.11.035

Cited by 31 publications

(10 citation statements)

References 22 publications

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“…With the same operating conditions, the main differences between the sludge generated between MBR and CAS process were the higher abundance of α and γ-Proteobacteria in the MBR bioreactor and the presence of AOB aggregates only on the surfaces of MBR flocs (Munz et al, 2008). Modeling also helped to determine the steady state and stability of a wastewater system that followed the Contois kinetics for biomass growth (Nelson et al, 2008).…”

Section: Applications a Submerged Microfiltration Hollow-mentioning

confidence: 99%

Biofilm Fixed Film Systems

Sharma¹,

Hong²,

Lau³

et al. 2009

Water Environment Research

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Section: Applications a Submerged Microfiltration Hollow-mentioning

confidence: 99%

Biofilm Fixed Film Systems

Sharma¹,

Hong²,

Lau³

et al. 2009

Water Environment Research

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“…Thus, in this work the degradation of a biodegradable organic material is represented by the Contois growth rate expression proposed by Contois (1959). Only a few studies have used the Contois model to simulate the operation of a bioreactor such as Nelson et al (2008) and Nelson and Holder (2009). Nelson et al (2008) investigated the behavior of a single reactor with recycle.…”

Section: Introductionmentioning

confidence: 99%

“…Only a few studies have used the Contois model to simulate the operation of a bioreactor such as Nelson et al (2008) and Nelson and Holder (2009). Nelson et al (2008) investigated the behavior of a single reactor with recycle. In this study, the best performance of the reactor is obtained in the case with perfect recycle (R * 1 = 1).…”

Section: Introductionmentioning

confidence: 99%

A mathematical model for the biological treatment of industrial wastewaters in a cascade of four reactors

Worthy

Nelson²,

Alqahtani

2011

Chan, F., Marinova, D. And Anderssen, R.S. (Eds) MODSIM2011, 19th International Congress on Modelling and Simulation.

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Many industrial processes, particularly in the food industry, produce slurries or wastewaters containing high concentrations of biodegradable organic materials. Before these contaminated wastewaters can be discharged the concentration of these pollutants must be reduced. A method which has been extensively employed to remove biodegradable organic matter is biological treatment. In this process the wastewater (or slurry) is passed through a bioreactor containing biomass which grows through consumption of the pollutants.

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“…The model (1 and 2) does not include biomass decay and has previously been considered for the case of a yield coefficient (γ = 0 and e = 0) in (Nelson et al 2008b …”

Section: The Dimensional Modelmentioning

confidence: 99%

“…When β = 0 it is an idealized membrane reactor, in which all of the microorganisms is forced to remain in the reactor vessel. The choice 0 < β < 1 gives a non-idealised membrane reactor which is equivalent to a reactor with recycle because the parameter β is related to the recycle parameter as β = 1 − R * (Nelson et al 2008b) where R * is the recycle parameter. In this case some of the microorganisms leave the reactor vessel and some of them stay at the reactor vessel.…”

Section: The Dimensional Modelmentioning

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 fundamental analysis of continuous flow bioreactor models and membrane reactor models to process industrial wastewaters

Cited by 31 publications

References 22 publications

Biofilm Fixed Film Systems

Biofilm Fixed Film Systems

A mathematical model for the biological treatment of industrial wastewaters in a cascade of four reactors

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

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