Shaping the Water–Energy–Food Nexus for Resilient Isolated Communities

A special issue of Water (ISSN 2073-4441). This special issue belongs to the section "Water-Energy Nexus".

Deadline for manuscript submissions: closed (10 February 2024) | Viewed by 2537

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Department of Electrical Engineering, University of Las Palmas de Gran Canaria, Campus de Tafira S/N, 35017 Las Palmas de Gran Canaria, Spain
Interests: energy science and technology; electrical engineering; green sustainable technology
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Special Issue Information

Dear Colleagues,

Many isolated communities face major difficulties in meeting basic needs in terms of water, clean energy and healthy food, not to mention strengthening themselves economically and socially.  How can isolated communities improve their water, energy and food security in the contexts of growing resource pressure, competition and uncertainty? Does a water-energy-food (WEF) nexus approach offer a way to identify forward-looking options and policies to strengthen their livelihoods and resilience? Indeed, a WEF nexus assessment can be beneficial when it effectively engages and empowers isolated communities with a view to fostering equal access to water, energy and food, simultaneously enhancing the diversity and depth of isolated communities’ livelihood options. This Special Issue is aimed at providing selected contributions on advances in the evaluation of water–energy–food nexus for resilient isolated communities. Potential topics may include, but are not limited to: energy-water-food nexus energy and efficient water resources management; water management through pumped storage hydropower; and hybrid energy solutions and efficiency flexibility in integrated solutions in the context of water, energy and food demand characterization.

Dr. Enrique Rosales-Asensio
Guest Editor

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Keywords

  • energy–water–food nexus
  • energy and water efficiency
  • resources management and storage
  • pumped storage hydropower
  • hybrid energy solutions
  • water management and efficiency
  • flexibility in integrated solutions
  • water demand and energy and food demand characterization

Published Papers (2 papers)

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Research

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13 pages, 1035 KiB  
Article
A Techno-Economic Appraisal of Green Diesel Generation through Hydrothermal Liquefaction, Leveraging Residual Resources from Seaweed and Fishing Sectors
by Enrique Rosales-Asensio, Elisabet Segredo-Morales, Natalia Gómez-Marín, Antonio Pulido-Alonso and Carlos Sierra
Water 2023, 15(17), 3061; https://doi.org/10.3390/w15173061 - 27 Aug 2023
Cited by 1 | Viewed by 1133
Abstract
This study examines the economic viability of an emerging technology for potential upscaling and commercialization in a specific location: the village of New Stuyahok, Alaska. The proposed technology is hydrothermal liquefaction, which utilizes kelp macroalgae and fishing waste as feedstock. These materials were [...] Read more.
This study examines the economic viability of an emerging technology for potential upscaling and commercialization in a specific location: the village of New Stuyahok, Alaska. The proposed technology is hydrothermal liquefaction, which utilizes kelp macroalgae and fishing waste as feedstock. These materials were chosen due to their easy availability in the village and their alignment with the local economy. The economic evaluation is based on the net present value (NPV) and sensitivity models. Different feedstock ratios (on a dry basis), such as 100:0, 50:50, and 30:70 of kelp and fishing waste, respectively, were evaluated to determine the optimal combination. The results indicated that the process is economically viable only when a high proportion of fishing waste is used. This can be ascribed to the constrained output yield of the kelp biomass and the relatively negligible influence exerted by alginate production on the NPV. However, the ratio 50:50 appears to be economically promising if the costs can be reduced by at least 13.5% or the benefits can be increased by 12.1%. Nevertheless, government support could play a crucial role in expediting the implementation of this technology once it becomes market-ready. This means being practical, scalable, and economically viable, enabling reduced investments or increased benefits that signify its readiness. Utilizing such a tool offers valuable insights into the framework of the proposed technology and the use of local natural resources. Full article
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7 pages, 160 KiB  
Review
Halophytes/Saline Water/Deserts/Wastelands Nexus as a Scalable Climate Mitigation including Freshwater Impacts
by Dennis M. Bushnell
Water 2024, 16(3), 373; https://doi.org/10.3390/w16030373 - 23 Jan 2024
Cited by 1 | Viewed by 1072
Abstract
Climate change is rapidly exacerbating and adding to major-to-existential issues associated with freshwater availability and utilization. The massive, thus far untapped saline/salt water/ocean—wastelands/deserts—Halophytes resources nexus can, at scale and profitably, provide major climate change mitigation and greatly alleviate most extant freshwater issues. Approaches [...] Read more.
Climate change is rapidly exacerbating and adding to major-to-existential issues associated with freshwater availability and utilization. The massive, thus far untapped saline/salt water/ocean—wastelands/deserts—Halophytes resources nexus can, at scale and profitably, provide major climate change mitigation and greatly alleviate most extant freshwater issues. Approaches include ocean fertilization and saline/seawater agriculture on deserts and wastelands to sequester massive amounts of CO2 and methane and for food, freeing up some 70% of the freshwater now utilized by current agriculture for direct human use. This also enables the production of huge amounts of biofuels and biomass-based chemical feedstock employing the massive capacity of cheap saline/seawater and cheap deserts and wastelands. Overall, saline/seawater can, uniquely, at the scale of the climate and freshwater issues, without desalinization, profitably, utilizing extant technologies, some 40% of the land that is deserts/wastelands, and the 97% of the water that is saline/seawater rapidly, seriously, address land, freshwater, food, energy, and climate. Full article
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