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Article

Toward Decentralised Sanitary Sewage Collection Systems: A Multiobjective Approach for Cost-Effective and Resilient Designs

1
Faculty of Civil Engineering and Architecture, Shahid Chamran University of Ahvaz, Ahvaz 61357831351, Iran
2
Department of Civil Engineering, Institute of Urban Water Management, TU Kaiserslautern, 67663 Kaiserslautern, Germany
*
Author to whom correspondence should be addressed.
Academic Editors: Robert Sitzenfrei, Kegong Diao and David Butler
Water 2021, 13(14), 1886; https://doi.org/10.3390/w13141886
Received: 1 June 2021 / Revised: 4 July 2021 / Accepted: 5 July 2021 / Published: 7 July 2021
(This article belongs to the Special Issue Resilience of Interdependent Urban Water Systems)
In recent years, the concept of a centralized drainage system that connect an entire city to one single treatment plant is increasingly being questioned in terms of the costs, reliability, and environmental impacts. This study introduces an optimization approach based on decentralization in order to develop a cost-effective and sustainable sewage collection system. For this purpose, a new algorithm based on the growing spanning tree algorithm is developed for decentralized layout generation and treatment plant allocation. The trade-off between construction and operation costs, resilience, and the degree of centralization is a multiobjective problem that consists of two subproblems: the layout of the networks and the hydraulic design. The innovative characteristics of the proposed framework are that layout and hydraulic designs are solved simultaneously, three objectives are optimized together, and the entire problem solving process is self-adaptive. The model is then applied to a real case study. The results show that finding an optimum degree of centralization could reduce not only the network’s costs by 17.3%, but could also increase its structural resilience significantly compared to fully centralized networks. View Full-Text
Keywords: decentralization; resilience; multiobjective optimization; sewage collection systems decentralization; resilience; multiobjective optimization; sewage collection systems
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MDPI and ACS Style

Zahediasl, A.; E. Bakhshipour, A.; Dittmer, U.; Haghighi, A. Toward Decentralised Sanitary Sewage Collection Systems: A Multiobjective Approach for Cost-Effective and Resilient Designs. Water 2021, 13, 1886. https://doi.org/10.3390/w13141886

AMA Style

Zahediasl A, E. Bakhshipour A, Dittmer U, Haghighi A. Toward Decentralised Sanitary Sewage Collection Systems: A Multiobjective Approach for Cost-Effective and Resilient Designs. Water. 2021; 13(14):1886. https://doi.org/10.3390/w13141886

Chicago/Turabian Style

Zahediasl, Arezoo, Amin E. Bakhshipour, Ulrich Dittmer, and Ali Haghighi. 2021. "Toward Decentralised Sanitary Sewage Collection Systems: A Multiobjective Approach for Cost-Effective and Resilient Designs" Water 13, no. 14: 1886. https://doi.org/10.3390/w13141886

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