Wastewater treatment plant design and operation under multiple conflicting objective functions

Hakanen, Jussi; Sahlstedt, Kristian; Miettinen, Kaisa

doi:10.1016/j.envsoft.2013.03.016

Cited by 54 publications

(42 citation statements)

References 21 publications

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“…The procedure continues until the DM is satisfied and believes that no better solution can be achieved. Additional details about these methods can be found in [18][19][20].…”

Section: Methods For Computing the Pareto Frontmentioning

confidence: 99%

“…Descoins and coworkers [56] and Hakanen and coworkers [20] have integrated a sludge treatment facility comprising an anaerobic digester within their flowsheets. Hakanen and coworkers [20] handled the biogas production as an objective function to be maximized in a MOOP. Descoins and coworkers [56] considered burning the produced biogas for electricity production.…”

Section: Sludge Disposal/valorizationmentioning

confidence: 99%

“…Hakanen and coworkers [20] has restricted its variation range between 2000 and 6000 g m À3 . In fact, these authors have considered steady influent conditions.…”

Section: Concentration Of Suspended Solids In the Bioreactorsmentioning

confidence: 99%

“…Descoins and coworkers [56] and Hakanen and coworkers [20] integrated a sludge treatment facility comprising an anaerobic digester (for biogas production) in their flowsheet. Using such a general formulation, the entire WWTP may be considered as a single unit: compared to the optimization of the ASP and the sludge treatment facility separately, this plant-wide control approach allows identifying better operating policies for the WWTP since the interactions between the two processes are accounted for.…”

Section: Flowsheet Structure/process Configurationmentioning

confidence: 99%

“…[10]), alpha-process [40], RDN and DRDN [41], etc. Some studies have included the primary clarifier within their flowsheet [20,28,34,52,56].…”

Section: Flowsheet Structure/process Configurationmentioning

confidence: 99%

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Optimal design and operation of activated sludge processes: State-of-the-art

Hreiz

Latifi

Roche

2015

Chemical Engineering Journal

171

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To cite this version:Rainier Hreiz, M A Latifi, Nicolas Roche. Optimal design and operation of activated sludge processes: State-of-the-art. Chemical Engineering Journal, Elsevier, 2015Elsevier, , 281, pp.900 -920. 10.1016Elsevier, /j.cej.2015 The paper deals with the optimal control and design of activated sludge processes. Studies on the topic are critically reviewed. Focus is set on the problem formulation that allows one getting reliable solutions. The selection of appropriate cost functions and constraints is discussed. Aspects related to dealing with model mismatch are presented. a r t i c l e i n f o t r a c tThe activated sludge process (ASP) is the most commonly used process for wastewater treatment. Improving its performance is necessary from economic and environmental point of views. In this context, dynamic optimization is a powerful tool for assisting engineers in determining optimal operations and designs for ASPs.However, the real optimality of the solution strongly depends on the optimization problem statement, for which unfortunately, there is no standard or commonly accepted formulation. In a hopeful attempt to provide a guideline for future works on the topic, this paper reviews the literature devoted to optimal control and design of ASPs. The main issues to be addressed in order to get reliable solutions are discussed, among which: (1) Managing the inevitable mismatch between the model predictions and the real ASP operation. (2) Dealing with the unpredictable variations in the wastewater characteristics. (3) Accounting for the slowest dynamic processes occurring in ASPs. (4) Appropriately selecting the decision variables and the flowsheet structure in order to simplify the problem formulation from a mathematical perspective. (5) Conveniently choosing the cost functions expressions/correlations. (6) Successfully selecting the mathematical constraints in order to guarantee physically relevant operations.

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“…The procedure continues until the DM is satisfied and believes that no better solution can be achieved. Additional details about these methods can be found in [18][19][20].…”

Section: Methods For Computing the Pareto Frontmentioning

confidence: 99%

Section: Sludge Disposal/valorizationmentioning

confidence: 99%

“…Hakanen and coworkers [20] has restricted its variation range between 2000 and 6000 g m À3 . In fact, these authors have considered steady influent conditions.…”

Section: Concentration Of Suspended Solids In the Bioreactorsmentioning

confidence: 99%

Section: Flowsheet Structure/process Configurationmentioning

confidence: 99%

“…[10]), alpha-process [40], RDN and DRDN [41], etc. Some studies have included the primary clarifier within their flowsheet [20,28,34,52,56].…”

Section: Flowsheet Structure/process Configurationmentioning

confidence: 99%

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