Optimal Implementation of Wastewater Reuse in Existing Sewerage Systems to Improve Resilience and Sustainability in Water Supply Systems

  • A transition from conventional centralized to hybrid decentralized systems has been increasingly advised recently due to their capability to enhance the resilience and sustainability of urban water supply systems. Reusing treated wastewater for non-potable purposes is a promising opportunity toward the aforementioned resolutions. In this study, we present two optimization models for integrating reusing systems into existing sewerage systems to bridge the supply–demand gap in an existing water supply system. In Model-1, the supply–demand gap is bridged by introducing on-site graywater treatment and reuse, and in Model-2, the gap is bridged by decentralized wastewater treatment and reuse. The applicability of the proposed models is evaluated using two test cases: one a proof-of-concept hypothetical network and the other a near realistic network based on the sewerage network in Chennai, India. The results show that the proposed models outperform the existing approaches by achieving more than a 20% reduction in the cost of procuring water and more than a 36% reduction in the demand for freshwater through the implementation of local on-site graywater reuse for both test cases. These numbers are about 12% and 34% respectively for the implementation of decentralized wastewater treatment and reuse.

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Author:Aakash Dev, Timo C. Dilly, Amin E. BakhshipourORCiD, Ulrich DittmerORCiD, S. Murty Bhallamudi
Parent Title (English):Water
Document Type:Article
Language of publication:English
Publication Date:2021/07/21
Year of Publication:2021
Publishing Institute:Technische Universität Kaiserslautern
Date of the Publication (Server):2021/10/08
Last Page:2021, 13(15)
Faculties / Organisational entities:Fachbereich Bauingenieurwesen
DDC-Cassification:6 Technik, Medizin, angewandte Wissenschaften / 624 Ingenieurbau und Umwelttechnik
Licence (German):Zweitveröffentlichung