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TitleAn augmented lagrangian pattern search method for optimal WWTP designs
Author(s)Espírito Santo, I. A. C. P.
Fernandes, Edite Manuela da G. P.
Araújo, Maria Madalena Teixeira de
Ferreira, E. C.
KeywordsActivated sludge system
Secondary settler
Pattern search method
Augmented lagrangian
Issue date2007
PublisherWorld Scientific and Engineering Academy and Society (WSEAS)
Abstract(s)This paper describes a derivative-free method to solve a non-linear constrained optimization problem that arises from the mathematical formulation of an activated sludge system of a wastewater treatment plant (WWTP), in which the objective is to minimize the investment and operation costs. The method relies on an augmented Lagrangian function to penalize infeasible solutions and uses the original Hooke and Jeeves pattern search method for solving bound constrained subproblems. The experimental results are very promising and give economically attractive WWTP designs.
TypeConference paper
AccessOpen access
Appears in Collections:CEB - Artigos em Livros de Atas / Papers in Proceedings

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