(C) Andres Sanz, Unsplash
Modelling and Assessment

Nexus Modelling // Involving the Water–Energy–Food Nexus in Integrating Low-Income and Isolated Communities

By Brenda Cansino-Loeza and José María Ponce-Ortega. This work presents a general mathematical programming model for satisfying water, energy, and food needs in isolated and low-income communities involving different process integration approaches. As a case study, the community with the lowest index of poverty and marginalization from the State of Guerrero in Mexico is presented. The problem consists in determining the optimal and sustainable configuration to satisfy the energy, water, and food demands of the inhabitants. Also, the use of waste-to-energy technologies is proposed to handle the municipal solid waste correctly and obtain valuated products from wastes to reduce the environmental impact.

A multi-objective analysis is presented considering the consumption of fresh water, the greenhouse gas emissions, and the cost of the integrated system as objective functions.

The results show that it is possible to satisfy the water, energy, and food needs in isolated communities accounting for integrated processes. Besides, it is possible to obtain trade-off solutions considering contradicting objectives. To trade-off the proposed objectives, it is presented a multistakeholder approach which is capable to find the compromise solution which is the point where the objectives are minimized simultaneously. The results show that the compromise solution is very close of the Utopian Point, which indicates that is possible to obtain a solution that satisfies almost entirely the minimum of the objectives.

 

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ACS Sustainable Chemistry and Engineering

Published

January 2019

In

ACS Sustainable Chem. Eng. 2019, 7, 1399−1418

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Nexus Blog

AFRICA 2019 Conference // Session Outcome on Nexus Securities for Populations affected by Multi-purpose Dams

By Luca Ferrini and Dr Miroslav Marence. The Nexus Dialogue in the Niger basin delivered an important presentation and conference paper to the AFRICA 2019 Conference in Windhoek, Namibia, on 3rd April 2019. The Dialogue was invited to present its experience by the IHE-Delft led project on Sustainable Hydropower. The paper, written by Luca Ferrini (GIZ Niger) and Dr Nora Van Cauwenbergh (IHE-Delft) has the title: When can local knowledge reduce vulnerability? Insights from multipurpose...

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Sanitation and Wastewater

Nexus Blog // Connecting Food Waste and Sanitation Services can help African Farmers

By Federico Davila, Alice Mutiti Mweetwa, Dana Cordell, Frank Mnthambala, Gudina Terefe Tucho, Ruben Sakrabani. African agriculture is fundamental to supporting rural livelihoods and bolstering economic growth, and can benefit from technology and advances in other development sectors. One solution to help Africa’s agriculture can come from an unlikely sector: sanitation.

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Capacity Building

Urban Nexus Policy Development Workshop // Applying the Urban Nexus Concept to Implementing Global Agendas

By Ruth Erlbeck, Ralph Trosse and Rashane Sala-Ngarm. The GIZ “Integrated Resource Management in Asian Cities: The Urban Nexus” project conducted an interactive workshop on Urban Nexus policy development in Bangkok, Thailand with participants from India, Indonesia, Mongolia and Vietnam. The Urban Nexus approach was recognized as a tool to deliver on global agendas such as the 2030 Agenda for Sustainable Development and the Paris Climate Agreement.

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