Siting And Sizing The Components Of A Regional
Wastewater System: A Multiobjective Approach
Author(s)
J. A. Zeferino, M. da Conceição Cunha & A. P. Antunes
Abstract
This paper describes a multiobjective approach for the siting and sizing of the
components of a regional wastewater system. This approach can be particularly
helpful for the coherent and harmonious implementation of the Water
Framework Directive. Three criteria are considered for finding efficient
solutions. A simulated annealing algorithm improved by a local search algorithm
is used and the results of three case studies are presented and compared.
Keywords: wastewater systems, multiobjective models, simulated annealing.
1 Introduction
The worldwide concern about water and sanitation has been expressed in
initiatives like the United Nations Millennium Development Goals. The target to
reduce by half the population without sustainable access to safe drinking water
and basic sanitation is incorporated in the goal to ensure environmental
sustainability. If this target is to be met appropriate wastewater systems have to
be implemented. These systems are often designed at a local level. However,
better solutions both from the economic and the environmental points of view
can be obtained with regional planning.
This work describes a multiobjective approach to regional wastewater system
planning. In this type of system, global cost is usually the criterion that is
optimized, making it a single-objective problem. The other indicators for
achieving a sustainable development are often included as problem constraints,
considering some upper and lower limits. However, for some indicators, these
limits may be difficult to establish, which can make them easier to handle as
criteria. Since the criteria to be optimized are usually incommensurable, it is
impossible to find a solution where all these criteria are optimized
Keywords
wastewater systems, multiobjective models, simulated annealing.
Related Book
Other papers in this volume
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