Journal ArticleDOI
Axial Dispersion Model for Upflow Anaerobic Sludge Blanket Reactors
TLDR
This study on the startup and steady‐state operation of a UASB reactor shows that its fluid flow can be explained just as well with a simple axial dispersion model.Abstract:
Fluid flow in UASB reactors is usually described by multicompartment models consisting of separate ideally mixed zones, plug flow zones, and stagnant zones linked with bypassing flows and back-mixing flows. A closer look at UASB reactor behavior indicates that this complexity is unnecessary. Our study on the startup and steady-state operation of a UASB reactor shows that its fluid flow can be explained just as well with a simple axial dispersion model. The physical transitions, which occur in different zones of the UASB reactor as the microorganisms acclimate to the wastewater, are adequately described by the model. Further, the number of parameters, which is six in standard UASB reactor models, is reduced to four in the case of the axial dispersion model.read more
Citations
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Production of a cellulolytic enzyme system in mixed-culture solid-state fermentation of soybean hulls supplemented with wheat bran
TL;DR: In this article, the results of static-tray fermentation of soybean hulls supplemented with wheat bran using a co-culture of Trichoderma reesei and Aspergillus oryzae were performed.
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Chemical engineering kinetics
TL;DR: Kinetics and Dynamics of Elementary Gas ReactionsKinetics of Chemical ReactionsMathematical Modelling of Gas-Phase Complex Reaction Systems: Pyrolysis and CombustionReaction Kinetics and Reactor Design, Second Edition
Journal ArticleDOI
Mathematical modelling of anaerobic reactors treating domestic wastewater: Rational criteria for model use
TL;DR: Anaerobic digestion modelling is an established method for assessing anaerobic wastewater treatment for design, systems analysis, operational analysis, and control as mentioned in this paper, and the key motivations for modelling have been identified as operational analysis and technology development.
Journal ArticleDOI
Modelling anaerobic biofilm reactors—A review
TL;DR: A critical review of the different mathematical models available for anaerobic biofilm reactors is presented and the unifiedAnaerobic digestion model (ADM1) and its application to anaerilic reactors are outlined.
Journal ArticleDOI
Hydrodynamics of upflow anaerobic sludge blanket reactors
TL;DR: The hydrodynamic characteristics of upflow anaerobic sludge blanket (UASB) reactors were investigated and the ISC model was better than the other models in describing the hydrodynamics of the UASB reactors.
References
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Journal ArticleDOI
A simplex method for function minimization
John A. Nelder,R. Mead +1 more
TL;DR: A method is described for the minimization of a function of n variables, which depends on the comparison of function values at the (n 41) vertices of a general simplex, followed by the replacement of the vertex with the highest value by another point.
Journal ArticleDOI
Use of the upflow sludge blanket (USB) reactor concept for biological wastewater treatment, especially for anaerobic treatment
TL;DR: In this paper, the main results obtained with the process in the laboratory as well as in 6 m3 pilot plant and 200 m3 full-scale experiments are presented and evaluated in this paper.
Journal ArticleDOI
Chemical engineering kinetics
TL;DR: Kinetics and Dynamics of Elementary Gas ReactionsKinetics of Chemical ReactionsMathematical Modelling of Gas-Phase Complex Reaction Systems: Pyrolysis and CombustionReaction Kinetics and Reactor Design, Second Edition
Journal ArticleDOI
The characteristics of granules from upflow anaerobic sludge blanket reactors
TL;DR: In this article, three distinct granule types were found to have evolved within an industrial UASB reactor, namely, black, grey and white granules, and these granules also differed in structure (texture) and elemental composition.
Journal ArticleDOI
Dynamics of liquid flow in an up-flow reactor-used for anaerobic treatment of wastewater
TL;DR: By means of stimulus‐response experiments with a Li+ tracer, a description of the fluid flow in a 30 m3 reactor, used for anaerobic treatment of wastewater, was derived and it was concluded that 60 m3 gas/day were sufficient to provide good mixing and also that the height of the sludge bed should be 2–3 m.
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