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34. The Local Nexus Network: Exploring the Future of Localised Food Systems and Associated Energy and Water Supply

Author

Cottee, Julian, López-Avilés, Alma, Behzadian, Kourosh, Bradley, David, Butler, David, Downing, Clare, Farmani, Raziyeh, Ingram, John, Leach, Matthew, Pike, Andy, De Propris, Lisa, Purvis, Laura, Robinson, Pamela, Yang, Aidong, Howlett, Robert J., Series editor, Jain, Lakhmi C., Series editor, Setchi, Rossi, editor, Liu, Ying, editor, and Theobald, Peter, editor

Published
2016
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40. A review of limitations and potentials of desalination as a sustainable source of water

Author

Sustainable Minerals Institute, University of Queensland, Brisbane, Australia, Centre for Water Systems, University of Exeter, Exeter, UK, Zolghadr‑Asli, Babak, McIntyre, Neil, Djordjevic, Slobodan, Farmani, Raziyeh, Pagliero, Liliana, Martínez Álvarez, Victoriano, Maestre Valero, José Francisco, Sustainable Minerals Institute, University of Queensland, Brisbane, Australia, Centre for Water Systems, University of Exeter, Exeter, UK, Zolghadr‑Asli, Babak, McIntyre, Neil, Djordjevic, Slobodan, Farmani, Raziyeh, Pagliero, Liliana, Martínez Álvarez, Victoriano, and Maestre Valero, José Francisco

Abstract

For centuries, desalination, in one way or another, has helped alleviate water scarcity. Over time, desalination has gone through an evolutionary process influenced largely by available contemporary technology. This improvement, for the most part, was reflected in the energy efficiency and, in turn, in terms of the cost-effectiveness of this practice. Thanks to such advancements, by the 1960s, the desalination industry experienced notable exponential growth, becoming a formidable option to supplement conventional water resources with a reliable non-conventional resource. That said, often, there are pressing associated issues, most notably environmental, socioeconomic, health, and relatively recently, agronomic concerns. Such reservations raise the question of whether desalination is indeed a sustainable solution to current water supply problems. This is exceptionally important to understand in light of the looming water and food crises. This paper, thus, tends to review these potential issues from the sustainability perspective. It is concluded that the aforementioned issues are indeed major concerns, but they can be mitigated by actions that consider the local context. These may be either prophylactic, proactive measures that require careful planning to tailor the situation to best fit a given region or reactive measures such as incorporating pre- (e.g., removing particles, debris, microorganisms, suspended solids, and silt from the intake water prior to the desalination process) and post-treatments (e.g., reintroducing calcium and magnesium ions to water to enhance its quality for irrigation purposes) to target specific shortcomings of desalination.

Published
2023

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