Cost minimization of a WWTP using an augmented lagrangian pattern search based ...

• Author(s): Espírito Santo, I. A. C. P. ; Fernandes, Edite Manuela da G. P. ; Araújo, M. Manuela ; Ferreira, E. C.
• Date: 2007
• Persistent ID: http://hdl.handle.net/1822/8964
• Origin: RepositóriUM - Universidade do Minho
• Subject(s): Activated sludge system; Secondary settler; Pattern search method; Augmented lagrangian
• Document Type: Conference Object
• Language: English

Description

This paper describes a derivative-free method that aims to solve an optimization problem arising from the mathematical formulation of an activated sludge system in which the objective is to minimize the investment and operation costs. The method relies on an augmented Lagrangian technique that uses a pattern search for solving bound constrained subproblems.