Effect of wall growth on the kinetic modeling of nitrite oxidation in a CSTR

Dokianakis, Spyros; Kornaros, Michael; Lyberatos, Gérasimos

doi:10.1002/bit.20758

Cited by 12 publications

(14 citation statements)

References 42 publications

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“…On the other hand, due to the formation of pathogenic biofilms, e.g., in medical devices, effective methods for their removal are investigated. 1,2 One of the most simple bioreactors used in experimental research [3][4][5] and industrial processes are continuous stirred tank bioreactors (CSTBR). Those bioreactors are also used in kinetic experiments of microbiological processes 3,5 .…”

Section: Introductionmentioning

confidence: 99%

Dynamic properties of a continuous stirred tank biofilm bioreactor for aerobic processes

Skoneczny

Tabiś

2016

AIChE Journal

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A dynamic analysis of a continuous stirred tank bioreactor with biofilm was performed. The existence of gas, liquid, and biofilm were taken into account. The proposed heterogeneous model of such bioreactor takes into account dynamic biofilm growth and interphase transfer of substrates and biomass for a double‐substrate aerobic process. Simulations were performed to investigate the influence of important process parameters, i.e., toxic substrate concentration in the feed stream, detachment rate coefficient, mean residence time of the liquid and aeration intensity, on dynamic properties of the bioreactor. Dynamic behavior at conditions of anoxia of microorganisms were shown. A method was proposed to reduce bioreactor start‐up time significantly. The paper presents a mathematical model of the bioreactor that uses a discrete model of biofilm growth based on the theory of cellular automata. Dynamics of the bioreactor based on the continuous and discrete biofilm model was compared. © 2016 American Institute of Chemical Engineers AIChE J, 63: 1818–1829, 2017

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Section: Introductionmentioning

confidence: 99%

Dynamic properties of a continuous stirred tank biofilm bioreactor for aerobic processes

Skoneczny

Tabiś

2016

AIChE Journal

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“…Because dissolved oxygen (DO) is considered one of the most dominant factors governing the nitrite oxidation performance, the effect of DO concentration in the bulk medium on the biofilm performance was theoretically addressed. One of the key assumptions of the model developed by Dokianakis et al (2006) is that biomass growth in the biofilm region is subjected to one substrate limitation, i.e. nitrite-nitrogen.…”

Section: Resultsmentioning

confidence: 99%

“…The detailed steps followed for the model development are described by Dokianakis et al (2006). For better understanding, though, the key assumptions will be presented herein.…”

Section: The Modelmentioning

confidence: 99%

“…However, simple chemostat models accounting for wall growth have also been formulated by Topiwala and Hamer (1971) and later by Baltzis and Fredrickson (1983). A general kinetic model was recently developed by Dokianakis et al (2006) as a modification of the Topiwala and Hamer model (1971) to describe nitrite oxidation by autotrophic nitrifiers under aerobic conditions in a mixed growth CSTR system, i.e. where active biomass is both in suspension and attached in reactor walls.…”

Section: Introductionmentioning

confidence: 99%

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Sensitivity analysis of a biofilm model describing mixed growth of nitrite oxidisers in a CSTR

Kornaros

Dokianakis

Lyberatos

2006

Water Science and Technology

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A simple kinetic model has been developed for describing nitrite oxidation by autotrophic aerobic nitrifiers in a CSTR reactor, in which mixed (suspended and attached) growth conditions are prevailing. In this work, a critical dimensionless parameter is identified containing both biofilm characteristics and microbial kinetic parameters, as well as the specific (per volume) surface of the reactor configuration used. Evaluation of this dimensionless parameter can easily provide information on whether or not wall attachment is critical, and should be taken into account either in kinetic studies or in reactor design, when specific pollutants are to be removed from the waste influent stream. The effect of bulk dissolved oxygen (DO) concentration on the validity of this model is addressed and minimum non-limiting DO concentrations are proposed depending on the reactor configuration.

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“…Two additional expressions for the hydrolysis of UAP and BAP have been added (Chen et al, 2012) and are described by the processes p 14 , p 15 . In the nitrification process (p 10 ) the effect of wall attached autotrophic biomass on growth-kinetics taken into account (Dokianakis et al, 2006). The dynamic behavior of cake growth on the membranes surface is based on classic cake filtration theory.…”

Section: Description Of the Model Processesmentioning

confidence: 99%

Computer simulation of a submerged membrane bioreactor treating high COD industrial wastewater

Palogos

Babatsouli

Costa

et al. 2014

Front. Environ. Sci.

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A dynamic model was developed to simulate the behavior of the biological processes taking place in a membrane bioreactor (MBR) pilot plant treating industrial wastewater at the Heraklion Industrial Park including the cake development on the membrane surface. The modified extended CES-ASM3 model has been used. Hydrolysis rates of the soluble microbial products have been added. Membrane fouling was taken into account and trans membrane pressure (TMP) was modeled and compared to experimental data. Simulation results are presented for the operation period between February 2012 and May 2013 and the prediction ability of the model is shown through the computation of the mean relative error of each measured state variable. Overall, the model estimates match the experimental data satisfactorily, as they follow similar trends while for all input variables their mean value was used as a constant input in the simulations. The operation of the MBR was conducted at three different sludge retention times.

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Effect of wall growth on the kinetic modeling of nitrite oxidation in a CSTR

Cited by 12 publications

References 42 publications

Dynamic properties of a continuous stirred tank biofilm bioreactor for aerobic processes

Dynamic properties of a continuous stirred tank biofilm bioreactor for aerobic processes

Sensitivity analysis of a biofilm model describing mixed growth of nitrite oxidisers in a CSTR

Computer simulation of a submerged membrane bioreactor treating high COD industrial wastewater

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