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2. Solar Disinfection Using Zero Valent Iron for Inactivation of Escherichia coli and Total Coliforms in Water Using a Raceway Reactor.

Author

Lienqueo-Aburto, Hugo, Cornejo-Ponce, Lorena, Baca-Delgado, Laura, Vilca-Salinas, Patricia, and Arenas-Herrera, María Janet

Subjects
ESCHERICHIA coli, COLIFORMS, WATER disinfection, WATER use, MICROBIAL contamination, WATER pollution, DRINKING water
Abstract

Contamination from microorganisms is one of the gravest types of water pollution. In 2022, there were 842,000 new cases of gastrointestinal diseases worldwide. The aim of this study was to size, construct, and evaluate a Raceway reactor (28 L total capacity) as a laboratory-scale solar disinfection system for the inactivation of Escherichia coli and total coliforms in water, using Zero Valent Iron (ZVI). For this purpose, a sample of E. coli contaminated potable water was treated with steel wool as a source of ZVI and solar irradiation. Using a 23 factorial design with four central points and a total of 12 trials, the following was investigated: the effect of the Fe0 dose (0.6–1.8 g L−1); it should be noted that both the natural and drinking waters of the study area have iron concentrations of less than 0.1 mg L−1. Depth tests of the treated water in the reactor were carried out at different levels (5, 7 and 9 cm) and with a duration of four to six hours. Therefore, it is concluded that the reactor/ZVI is effective for the disinfection of E. coli and total coliforms at concentrations >2419.6 MPN/100 mL, reaching 99.96% disinfection for both cases; it is also a cost-effective treatment due to its inexpensive inputs. [ABSTRACT FROM AUTHOR]

Published
2023
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5. Integrated Aquaculture Recirculation System (IARS) Supported by Solar Energy as a Circular Economy Alternative for Resilient Communities in Arid/Semi-Arid Zones in Southern South America: A Case Study in the Camarones Town

Author

Cornejo-Ponce, Lorena, primary, Vilca-Salinas, Patricia, additional, Lienqueo-Aburto, Hugo, additional, Arenas, María J., additional, Pepe-Victoriano, Renzo, additional, Carpio, Edward, additional, and Rodríguez, Juan, additional

Published
2020
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7. Use of Saline Waste from a Desalination Plant under the Principles of the Circular Economy for the Sustainable Development of Rural Communities

Author

Ponce, Lorena Cornejo, Vilca-Salinas, Patricia, Arenas, María J., Lienqueo-Aburto, Hugo, and Moraga-Contreras, Claudia

Subjects
Business & Economics
Abstract

In the region of Arica and Parinacota, Chile (South America), concerned about the environment, the use of brine from a reverse osmosis plant was considered as irrigation water, which is generally discharged into the sea, sewers, or nearby rivers. In this sense, the integrated management of this waste was studied under the 3 principles and 11 strategies of the circular economy, for which it will be used to produce halophilic fodder (Atriplex nummularia), supporting the sustainability of livestock farmers in the sector. As for the results, it was estimated that with 86,400 Lh-1 in 20 days of brine, 400 A. nummularia plants would be irrigated, with an energy consumption of 31,319 kWh per day, through a photovoltaic system. In addition, of the 11 strategies of the circular economy, this study complies with 9 of them. It is noteworthy that the combination of brackish water desalination technologies and solar energy to produce A. nummularia would avoid the production of 1.5 tons of CO2. Finally, this study opens potential opportunities for future research, for the implementation of this type of project in rural communities, considering an optimization in the management of saline waste and water.

Published
2019

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