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Article

Cost–Benefit Evaluation of Decentralized Greywater Reuse Systems in Rural Public Schools in Chile

1
Departamento de Ingeniería Hidráulica y Ambiental, Pontificia Universidad Católica de Chile, Avenida Vicuña Mackenna 4860, Macul, Santiago 7820436, Chile
2
Departamento de Química Inorgánica, Facultad de Química y de Farmacia, Pontificia Universidad Católica de Chile, Avenida Vicuña Mackenna 4860, Macul, Santiago 7820436, Chile
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Instituto de Geografía, Pontificia Universidad Católica de Chile, Avda. Vicuña Mackenna 4860, Santiago 7820436, Chile
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Fundación un Alto en el Desierto, Omar Elorza 704, Ovalle 1842274, Chile
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Escuela de Biotecnología, Universidad Mayor, Camino La Pirámide 5750, Huechuraba, Santiago 8580745, Chile
*
Author to whom correspondence should be addressed.
Water 2020, 12(12), 3468; https://doi.org/10.3390/w12123468
Received: 5 November 2020 / Revised: 30 November 2020 / Accepted: 5 December 2020 / Published: 10 December 2020
(This article belongs to the Special Issue The Use of Greywater and Wastewater for Irrigation)
Water scarcity is one of the most important climatic threats in recent times. In Chile, the north and north-central areas, with predominantly arid or semi-arid climates, have been strongly affected by the low availability of water, as well as by overexploitation of water resources derived from the negative effect caused by some sectors of the economy such as agriculture and mining. Only 53% of households in rural areas in Chile have access to drinking water from a public network. To date, some pilot greywater treatment systems have been implemented in rural public schools. This paper presents an economic analysis of pilot systems for greywater treatment from three case studies. The results showed that the implementation of these systems would not be economically feasible, since the initial investment costs can exceed USD 5200, which is not offset by the water savings. However, other benefits, such as thermal regulation, better life quality, and the feeling of well-being and satisfaction of students and teachers should be considered to be paramount for the evaluation of treatment systems. In addition, current levels of treated greywater could allow irrigation of 6.24, 5.68, and 3.56 m2/person in the Alejandro Chelén, El Guindo, and Pedro de Valdivia schools, respectively. These results contribute to a better understanding of the social role that should be applied to the evaluation of ecological systems that save water and improve the well-being of the population. View Full-Text
Keywords: greywater; water scarcity; water reuse; economic analysis greywater; water scarcity; water reuse; economic analysis
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MDPI and ACS Style

Rodríguez, C.; Sánchez, R.; Rebolledo, N.; Schneider, N.; Serrano, J.; Leiva, E. Cost–Benefit Evaluation of Decentralized Greywater Reuse Systems in Rural Public Schools in Chile. Water 2020, 12, 3468. https://doi.org/10.3390/w12123468

AMA Style

Rodríguez C, Sánchez R, Rebolledo N, Schneider N, Serrano J, Leiva E. Cost–Benefit Evaluation of Decentralized Greywater Reuse Systems in Rural Public Schools in Chile. Water. 2020; 12(12):3468. https://doi.org/10.3390/w12123468

Chicago/Turabian Style

Rodríguez, Carolina; Sánchez, Rafael; Rebolledo, Natalia; Schneider, Nicolás; Serrano, Jennyfer; Leiva, Eduardo. 2020. "Cost–Benefit Evaluation of Decentralized Greywater Reuse Systems in Rural Public Schools in Chile" Water 12, no. 12: 3468. https://doi.org/10.3390/w12123468

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