Dispersed plug flow model for upflow anaerobic sludge bed reactors with focus on granular sludge dynamics

Kalyuzhnyi, S.; Fedorovich, V.; Lens, Piet N.L.

doi:10.1007/s10295-005-0217-2

Cited by 38 publications

(23 citation statements)

References 30 publications

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“…To overcome these limitations, a modification is required [10,121]. A new model UASB reactor called one dimensional dispersed plug flow model was developed by the Kalyuzhnyi et al [122]. This model focuses on the granular sludge dynamics along the height of the reactor, based on the balance between the dispersion, sedimentation and conversion with the use of one dimensional (with regard to the height of the reactor) equations.…”

Section: Conventional (Single Phase) Anaerobic Treatment Of Cheese Wheymentioning

confidence: 99%

Biotechnological Utilization with a Focus on Anaerobic Treatment of Cheese Whey: Current Status and Prospects

2012

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Abstract:Cheese whey utilization is of major concern nowadays. Its high organic matter content, in combination with the high volumes produced and limited treatment options make cheese whey a serious environmental problem. However, the potential production of biogas (methane), hydrogen or other marketable products with a simultaneous high COD reduction through appropriate treatment proves that cheese whey must be considered as an energy resource rather than a pollutant. The presence of biodegradable components in the cheese whey coupled with the advantages of anaerobic digestion processes over other treatment methods makes anaerobic digestion an attractive and suitable treatment option. This paper intends to review the most representative applications of anaerobic treatment of cheese whey currently being exploited and under research. Moreover, an effort has been made to categorize the common characteristics of the various research efforts and find a comparative basis, as far as their results are concerned. In addition, a number of dairy industries already using such anaerobic digestion systems are presented.

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Section: Conventional (Single Phase) Anaerobic Treatment Of Cheese Wheymentioning

confidence: 99%

Biotechnological Utilization with a Focus on Anaerobic Treatment of Cheese Whey: Current Status and Prospects

2012

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“…However, decay of the microorganisms may occur due to the presence of toxic compounds (Kryłów 2003), predation (Bitton 2005), and lysis (Kalyuzhnyi et al 2006). This means that inactive biomass is constantly appearing due to decay, while reproduction of microorganisms results in an increase in active biomass.…”

Section: Conceptual Modelmentioning

confidence: 99%

“…The main problem with the existing dynamic models is that they are complex, including many parameters which are not always easy to measure experimentally (Kalyuzhnyi et al 2006;Batstone et al 2002). However, simple models omit some important processes (Sponza and Uluköy 2008;Wu and Hickey 1997;Narnoli and Mehrotra 1997), such as the mass transport resistance that the substrate encounters before its biotransformation.…”

Section: Introductionmentioning

confidence: 99%

A model to describe the performance of the UASB reactor

et al. 2013

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A model to describe the performance of the UASB reactor. Abstract A dynamic model to describe the performance of the Upflow Anaerobic Sludge Blanket (UASB) reactor was developed. It includes dispersion, advection, and reaction terms, as well as the resistances through which the substrate passes before its biotransformation. The UASB reactor is viewed as several continuous stirred tank reactors connected in series. The good agreement between experimental and simulated results shows that the model is able to predict the performance of the UASB reactor (i.e. substrate concentration, biomass concentration, granule size, and height of the sludge bed).

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“…In the studies by Kalyuzhnyi et al, (2006) and Schoefs et al, (2004), relatively simple reaction kinetics was used. Batstone et al, (2005) developed a distributed parameter model by combining the ADM1 kinetics with the Takacs clarifier model (Takacs et al, 1991), which approximates a UASB reactor by using several layers, i.e., reactor hydrodynamics was simplified.…”

Section: Tecno Lógicasmentioning

confidence: 99%

“…This regression model should be substituted by more-complex models (e.g., Kalyuzhnyi et al, 2006) if some insight on granular sludge dynamics is desired.…”

Section: Tecno Lógicasmentioning

confidence: 99%

Anaerobic digestion modeling: from one to several bacterial populations

Ramírez-Rivas¹

2011

TecnoL.

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Los sistemas de digestión anaeróbica son procesos complejos que desafortunadamente a menudo sufren de inestabilidad. A fin de diseñar, optimizar y operar eficientemente estos sistemas es necesario desarrollar estrategias apropiadas de control. Estas estrategias requieren, en general del desarrollo de modelos matemáticos. El proceso de digestión anaerobia comprende una red compleja de reacciones secuenciales y paralelas de naturaleza bioquímica y fisicoquímica. Generalmente, estas reacciones contienen un paso en particular, denominado reacción-limitante el cual siendo el más lento, limita la tasa de reacción del proceso global. Los primeros intentos del modelado de la digestión anaerobia condujeron a modelos que describen este paso limitante. Sin embargo, en una amplia gama de condiciones de funcionamiento, el paso limitante no siempre es el mismo. Este puede depender de las características de las aguas residuales, de la carga hidráulica, de la temperatura, etc. Es evidente que la "hipótesis del paso limitante" conduce a modelos simples y fácilmente utilizables. Sin embargo, estos modelos no describen muy bien el comportamiento del digestor, especialmente en condiciones transitorias de funcionamiento. Este trabajo revisa el estado del arte en modelización de la digestión anaerobia. Damos una breve descripción de los modelos clave de digestión anaerobia que se han desarrollado hasta el momento para describir sistemas con crecimiento de biomasa, incluyendo el modelo de digestión anaerobia No 1 (ADM1) de la Asociación Internacional del Agua (IWA) e identificamos las áreas que requieren esfuerzos futuros de investigación.

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Dispersed plug flow model for upflow anaerobic sludge bed reactors with focus on granular sludge dynamics

Cited by 38 publications

References 30 publications

Biotechnological Utilization with a Focus on Anaerobic Treatment of Cheese Whey: Current Status and Prospects

Biotechnological Utilization with a Focus on Anaerobic Treatment of Cheese Whey: Current Status and Prospects

A model to describe the performance of the UASB reactor

Anaerobic digestion modeling: from one to several bacterial populations

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