Water treatment plant prototype with ph control modeled on fuzzy logic for removing arsenic using fe(VI) and fe(III)

• Autores: Paredes Larroca, Fabricio Humberto, Saettone Olschewski, Erich Arturo, Quino Favero, Javier, Huamaní, Jimmy Rosales, Castillo Sequera, José Luis
• Formato: artículo
• Fecha de Publicación: 2020
• Institución: Universidad de Lima
• Repositorio: ULIMA-Institucional
• Lenguaje: inglés
• OAI Identifier: oai:repositorio.ulima.edu.pe:20.500.12724/11851
• Enlace del recurso: https://hdl.handle.net/20.500.12724/11851; https://doi.org/10.3390/w12102834
• Nivel de acceso: acceso abierto
• Materia: Water treatment; Arsenic; Tratamiento de aguas; Arsénico; https://purl.org/pe-repo/ocde/ford#2.11.04

This study proposes a fuzzy control strategy embedded in a Siemens IoT2040 gateway developed for removing inorganic arsenic from synthetic underground water in a treatment plant prototype. The prototype is used to dose a constant flow of Fe(VI) to maintain an oxide-reduction potential to guarantee the oxidation of arsenite into arsenate, while the fuzzy logic embedded in the IoT control manages the addition of Fe(III) to achieve a proper pH adjustment and efficient arsenate removal. The tests used synthetic Bangladesh groundwater enriched with 200 µg/L of arsenite and 200 µg/L of arsenate. The results revealed that the plant prototype yielded an effective treatment of the water. Arsenate was decreased to an average value of 6.66 µg/L and, the arsenite concentration decreased to 1.01 µg/L or less. These values were lower than the limit of 10 µg/L deemed by the World Health Organization as safe for human consumption.