Optimization of an operating domestic wastewater treatment plant using elitist non-dominated sorting genetic algorithm

Iqbal, Jawed; Guria, Chandan

doi:10.1016/j.cherd.2009.04.010

Cited by 33 publications

(12 citation statements)

References 38 publications

(48 reference statements)

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“…Espírito-Santo and coworkers [29] constrained it between 800 and 6000 g m À3 , Iqbal and Guria [42] between 2000 and 9000 g m À3 , El-Shorbagy and coworkers [34] between 3000 and 5000 g m À3 , and Descoins and coworkers [56] between 1000 and 9000 g m À3 .…”

Section: Concentration Of Suspended Solids In the Bioreactorsmentioning

confidence: 99%

“…However, it is not possible to judge if one is better than the other: each one may reveal more convenient for a given plant design and pump type. Nonetheless, the differential head of 10 bar used in [42] for the raw sewage pump seems unrealistic. Concerning sludge wastage, most studies have associated it with an important differential head, probably to account for some further sludge treatment and pumping charges, e.g.…”

Section: Pumps Power Consumptionmentioning

confidence: 99%

“…Moreover, if all DVs are time-independent, with the use of such an assumption, it becomes possible to convert the original dynamic problem into a static optimization problem as follows: all time derivatives are considered nil, so the process model becomes a set of equality constraints, and the state variables become a set of additional DVs which values are to be determined by the optimization algorithm [29,35,36,[40][41][42][43]. Although the static optimization problem involves additional DVs, however, it does not require model integration.…”

Section: Influent Characteristicsmentioning

confidence: 99%

“…maximizing the ASP productivity. Iqbal and Guria [42] investigated the maximum wastewater flow rate that the ASP can treat efficiently, i.e. the maximum plant throughout/capacity.…”

Section: Other Criteriamentioning

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

170

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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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Section: Concentration Of Suspended Solids In the Bioreactorsmentioning

confidence: 99%

Section: Pumps Power Consumptionmentioning

confidence: 99%

Section: Influent Characteristicsmentioning

confidence: 99%

“…maximizing the ASP productivity. Iqbal and Guria [42] investigated the maximum wastewater flow rate that the ASP can treat efficiently, i.e. the maximum plant throughout/capacity.…”

Section: Other Criteriamentioning

confidence: 99%

See 2 more Smart Citations

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

Hreiz

Latifi

Roche

2015

Chemical Engineering Journal

170

View full text Add to dashboard Cite

show abstract

“…In a different study, Iqbal and Guira developed an optimization procedure for an activated sludge reactor. They built a multi-objective optimization (MOO) to take into consideration the maximized influent flow rate of wastewater and minimized exit effluent biological oxygen demand (BOD) (Iqbal & Guriaa, 2009). The correct utilization of this method would be a necessity in the treatment process modeling and optimization as the non-linear and complex behavior dominating the bioreactor performance requires.…”

Section: Fig 4 Overview Of the Ga-ann Modelmentioning

confidence: 99%