Cost comparison of centralized and decentralized wastewater management systems using optimization model

Journal of Environmental Management
Youngmee Tiffany JungYu-Ling Cheng

Abstract

There is a growing interest in decentralized wastewater management (DWWM) as a potential alternative to centralized wastewater management (CWWM) in developing countries. However, the comparative cost of CWWM and DWWM is not well understood. In this study, the cost of cluster-type DWWM is simulated and compared to the cost of CWWM in Alibag, India. A three-step model is built to simulate a broad range of potential DWWM configurations with varying number and layout of cluster subsystems. The considered DWWM scheme consists of cluster subsystems, that each uses simplified sewer and DEWATS (Decentralized Wastewater Treatment Systems). We consider CWWM that uses conventional sewer and an activated sludge plant. The results show that the cost of DWWM can vary significantly with the number and layout of the comprising cluster subsystems. The cost of DWWM increased nonlinearly with increasing number of comprising clusters, mainly due to the loss in the economies of scale for DEWATS. For configurations with the same number of comprising cluster subsystems, the cost of DWWM varied by ±5% around the mean, depending on the layout of the cluster subsystems. In comparison to CWWM, DWWM was of lower cost than CWWM when configured with fewer t...Continue Reading

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Citations

Sep 14, 2019·Water Environment Research : a Research Publication of the Water Environment Federation·Nathaniel P SheehanKimberly Quell
Feb 21, 2019·Journal of Environmental Management·Pritha ChatterjeeJukka Rintala
Aug 14, 2020·The Science of the Total Environment·Renato Montenegro-AyoSergi Garcia-Segura
Mar 14, 2021·The Science of the Total Environment·Andre TorreRamzy Kahhat
Aug 26, 2020·Environmental Science & Technology·Min LiXia Huang
Nov 11, 2021·The Science of the Total Environment·Montenegro-Rosero KarlaEspinoza-Montero Patricio
Nov 8, 2021·The Science of the Total Environment·Sofía EstévezMaría Teresa Moreira

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