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Environmental impact evaluation of decentralized sewage treatment technologies: A life cycle assessment approach

Lookup NU author(s): Professor David GrahamORCiD

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Abstract

© 2021 CIWEMA life cycle assessment study on decentralized sewage (DS) treatment technologies is conducted using Gabi software and ReCiPe midpoint method, focusing on three DS treatment technologies: extended aeration (EA), imhoff (IF) and activated sludge (AS). The three most significant environmental impacts identified by the analysis are climate change (CC), freshwater eutrophication potential (FEP) and marine eutrophication potential (MEP). In this study, none of the DS systems could reduce all three indicators assessed. In terms of CC, IF has the lowest impact, with a value of 2.78 kg CO2 eq/m3, while EA has the lowest FEP impact of 0.030 kg P eq/m3. As regards MEP, AS has the lowest value of 0.043 kg N eq/m3. The findings offer investors with relevant information on the effects of the three DS treatment technologies used to treat domestic wastewater in Malaysia.

Publication metadata

Author(s): Sharvini SR, Noor ZZ, Kamaruddin SN, Mohammad Sabli NS, Sabeen AH, Aris A, Yong EL, Graham DW

Publication type: Article

Publication status: Published

Journal: Water and Environment Journal

Year: 2022

Volume: 36

Issue: 2

Pages: 261-269

Print publication date: 01/05/2022

Online publication date: 16/10/2021

Acceptance date: 09/10/2021

ISSN (print): 1747-6585

ISSN (electronic): 1747-6593

Publisher: John Wiley and Sons Inc

URL: https://doi.org/10.1111/wej.12760

DOI: 10.1111/wej.12760

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