Dynamic modeling of wastewater treatment processes

Lessard, Paul; Beck, M.B.

doi:10.1021/es00013a002

Cited by 31 publications

(16 citation statements)

References 49 publications

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“…Problems in precise modelling of primary clarifiers are caused by the complexity of the dynamic behaviour of the sedimentation processes and include (Lessard and Beck, 1991a):…”

Section: Modelling Of Primary Clarifiersmentioning

confidence: 99%

“…Nevertheless, a variety of primary clarification models has been proposed, ranging from steady-state models to lumped and distributed parameter models (see Lessard and Beck (1991a) for references). Simple models usually relate the removal efficiency to influent suspended solids concentration and/or overflow rate.…”

Section: Modelling Of Primary Clarifiersmentioning

confidence: 99%

“…Similarly, Lessard and Beck (1991a) state that simple lumped-parameter models (such as those by Alarie et at. (1980) and by Lessard and Beck (1988» have proven to be reliable.…”

Section: Modelling Of Primary Clarifiersmentioning

confidence: 99%

See 2 more Smart Citations

Modelling, Simulation and Control of Urban Wastewater Systems

Schütze¹,

Beck²,

Butler³

2002

108

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“…Problems in precise modelling of primary clarifiers are caused by the complexity of the dynamic behaviour of the sedimentation processes and include (Lessard and Beck, 1991a):…”

Section: Modelling Of Primary Clarifiersmentioning

confidence: 99%

Section: Modelling Of Primary Clarifiersmentioning

confidence: 99%

See 1 more Smart Citation

Modelling, Simulation and Control of Urban Wastewater Systems

Schütze¹,

Beck²,

Butler³

2002

108

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“…Primary clarification is often considered as being not very "sensitive", resulting in the use of simplified, steady-state approach models to represent its dynamic behaviour [3] . Additionally, most of the available primary clarifier models do not consider any biological reactions to occur in the reactor, simulating only the suspended solids (SS) behaviour, whereas in certain cases some biological phenomena take place in the primary settler as modelled by Reference [4].…”

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confidence: 99%

Improved Modelling of Wastewater Treatment Primary Clarifier Using Hybrid Anns

Rustum¹,

Adeloye²

2012

IJCSAI

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Abstract-This paper presents the results of modelling to predict the effluent biological oxygen demand (BOD 5 ) concentration for primary clarifiers using a hybridisation of unsupervised and supervised artificial neural networks. The hybrid model is based on the unsupervised self-organising map (SOM) whose features were then used to train a multi-layered perceptron, feedforward back propagation artificial neural networks (MLP-ANN). In parallel with this, another MLP-ANN was trained but using the raw data. A comparison of the outputs from the two MLP-ANNs showed that the hybrid approach was far superior to the raw data approach. The study clearly demonstrates the usefulness of the clustering power of the SOM in helping to reduce noise in observed data to achieve better modelling and prediction of environmental systems behaviour.

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“…Less emphasis has been given to modeling the activated sludge clarifier hydrodynamic processes as a unified system (Lessard and Beck, 1991). Some empirical and one-dimensional models of thickening and clarification have been proposed to simulate the clarifier in a coupled system model (Dupont and Henze, 1992;Vitasovic, 1989;Stenstrom, 1976).…”

mentioning

confidence: 99%

A dynamic solids inventory model for activated sludge systems

Zhong¹,

McCorquodale²,

Zhou³

et al. 1996

Water Environment Research

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Clarifier hydrodynamics plays an important role in the activated sludge process. Attention has long been focused on the biological behavior of the aeration basin in the secondary treatment system. One-dimensional settler models or empirical relationships have typically been coupled in wastewater treatment plant simulation systems to represent the clarifier. The research on the hydrodynamic aspects of the process are currently restricted to a clarifier uncoupled from the aeration basin. In this paper, a dynamic model of the activated sludge process is presented in which balanced emphasis is put on the hydrodynamic aspect of the system. The model integrates a biological reaction submodel for an aeration basin with a two-dimensional hydrodynamic solids transport submodel for the secondary clarifier. A verification of the model is carried out against a set of field data and shows good agreement. The model has been used to investigate the response and the interdependency of the aerator and clarifier in the activated sludge system. Water Environ. Res., 68, 329 (1996).

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Dynamic modeling of wastewater treatment processes

Cited by 31 publications

References 49 publications

Modelling, Simulation and Control of Urban Wastewater Systems

Modelling, Simulation and Control of Urban Wastewater Systems

Improved Modelling of Wastewater Treatment Primary Clarifier Using Hybrid Anns

A dynamic solids inventory model for activated sludge systems

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