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.
ACS Sustainable Chem. Eng. 2019, 7, 1399−1418
The GIZ- sponsored Environmental Management and Rural Development Network in Latin America and the Caribbean (GADER-ALC) organized a regional meeting on Digitalization from May 7th to May 9th. The 2019 Nexus Workstream - coordinated by Bolivia and Chile - was awarded EUR 5000 from an Innovation Fund to carry out knowledge cafés for a regional exchange on the WEF Nexus approach as well as for a regional Nexus Forum to be held in La Paz, Bolivia, in September this year.// more
By Dr. Nisreen Lahham. The Nexus Regional Dialogue in the MENA region participated in the final workshop of the “Integrated Resource Management in Asian Cities: The Urban Nexus” project, held in Bangkok, Thailand, from May 22nd - May 23rd. This project, implemented by GIZ in partnership with UN-ESCAP and ICLEI-Local Governments for Sustainability, and with funding from the German Federal Ministry for Economic Cooperation and Development (BMZ), organized its final workshop, commemorating the...// more
The Joint Research Centre (JRC) and European Commission's Directorate-General for International Cooperation and Development (DG DEVCO) have recently launched a Position Paper on the Water, Energy, Food and Ecosystems (WEFE) Nexus and the Sustainable Development Goals (SDGs). Highlighting the key outcomes of exchanges with experts held in 2018, the Paper aims to launch a dialogue on how to operationalise the WEFE Nexus.// more