eprintid: 10190058 rev_number: 7 eprint_status: archive userid: 699 dir: disk0/10/19/00/58 datestamp: 2024-04-05 12:34:52 lastmod: 2024-04-05 12:34:52 status_changed: 2024-04-05 12:34:52 type: article metadata_visibility: show sword_depositor: 699 creators_name: Gupta, Rohit creators_name: Lee, Susan creators_name: Lui, Jade creators_name: Sloan, William T creators_name: You, Siming title: Carbon footprint assessment of water and wastewater treatment works in Scottish islands ispublished: pub divisions: UCL divisions: B04 divisions: C05 divisions: F45 keywords: Water; Community; Islands; Global warming potential; Net zero; Life cycle assessment note: Copyright © 2024 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). abstract: Quantifying the global warming potential of existing water infrastructure is an important step in realising the water industry's commitment to net-zero carbon. Whilst there has been an improved understanding of the global warming potential of centralized urban water infrastructure, rigorous analyses of smaller-scale rural systems are rare. This work adopts a life cycle assessment to ascertain the global warming potential of existing drinking water treatment works and wastewater treatment works associated with five Scottish islands: Arran, Iona, Jura, Barra, and Vatersay. The water systems, from source to sink, along with the use of chemicals, transportation, energy, and the reuse of waste products from water infrastructure are considered. The global warming potentials of the island's drinking water treatment works ranged from 0.18 to 0.79 kgCO2-eq/m3 of drinking water, while that for wastewater treatment works were 0.51 to 1.14 kgCO2-eq/m3 of wastewater. The global warming potential for water services on the islands can be as much as 7-times of that water services across Scotland as previously reported. Major global warming potential contributor in drinking water treatment works was the electricity consumed by the membrane bioreactors. The modelled direct emission of methane from sludge in septic tanks and for land reclamation made the largest contribution to global warming potential. It was also highly sensitive to model parameters, which highlights the need for a comprehensive exploration of process emissions from septic tanks and sludge handling. This analysis of existing rural water infrastructure is a baseline against which potential alternative low-carbon technology configurations can be compared. date: 2024-04-15 date_type: published publisher: Elsevier BV official_url: http://dx.doi.org/10.1016/j.jclepro.2024.141650 oa_status: green full_text_type: pub language: eng primo: open primo_central: open_green verified: verified_manual elements_id: 2261363 doi: 10.1016/j.jclepro.2024.141650 lyricists_name: Gupta, Rohit lyricists_id: RGUPA08 actors_name: Gupta, Rohit actors_id: RGUPA08 actors_role: owner full_text_status: public publication: Journal of Cleaner Production volume: 450 article_number: 141650 issn: 0959-6526 citation: Gupta, Rohit; Lee, Susan; Lui, Jade; Sloan, William T; You, Siming; (2024) Carbon footprint assessment of water and wastewater treatment works in Scottish islands. Journal of Cleaner Production , 450 , Article 141650. 10.1016/j.jclepro.2024.141650 <https://doi.org/10.1016/j.jclepro.2024.141650>. Green open access document_url: https://discovery.ucl.ac.uk/id/eprint/10190058/1/Gupta%20et%20al.%20April%202024.pdf