Please use this identifier to cite or link to this item: http://repositorio.ufc.br/handle/riufc/69162
Type: Artigo de Periódico
Title: Aqualuz: a new solar disinfection device for treatment of cistern water
Authors: Magalhães, Jefferson Hannover Faustino
Bezerra, Letícia Nunes
Santos, Anna Luísa Beserra
Silveira, Cleiton da Silva
Nunes, Ana Bárbara de Araújo
Lima Neto, Iran Eduardo
Keywords: Bacterial decay;Drylands;Escherichia coli;Solar water disinfection;Water quality
Issue Date: 2022
Publisher: AQUA — Water Infrastructure, Ecosystems and Society
Citation: LIMA NETO, I. E. et al. Aqualuz: a new solar disinfection device for treatment of cistern water. AQUA — Water Infrastructure, Ecosystems and Society, [s.l.], v. 71, n. 6, p. 682-696, 2022. DOI: https://doi.org/10.2166/aqua.2022.092
Abstract: We conducted field, laboratory and modeling studies to evaluate the efficiency of a new solar disinfection (SODIS) device called Aqualuz for the removal of Escherichia coli (EC) from cistern water in the Brazilian semiarid, for different solar exposure–water temperature conditions. The results indicated EC contamination (100–300 MPN/100 mL) in all tests performed. As compared to the literature, lower exposure times (2.5–4.0 h) and solar radiations (250–410 W/m²) were sufficient for EC elimination. Then, assuming the complete-mix approach and first-order kinetics, it was possible to adjust EC decay rate constants (k) considering three different models: constant k-value, k as a function of water temperature and a new formulation for k as a function of both solar radiation and water temperature. All models performed well with normalized root mean squared logarithmic error (NRMSLE) lower than 20%, but the best fitting was obtained with the new approach. A new relationship between solar radiation and water temperature was also obtained, which allowed model simulations of EC decay for 34 municipalities in the Brazilian northeast, resulting in a color map for the region depicting the exposure periods of 1.8–5.6 h for reaching a 3-log reduction.
URI: http://www.repositorio.ufc.br/handle/riufc/69162
ISSN: 2709-8036
Access Rights: Acesso Aberto
Appears in Collections:DEHA - Artigos publicados em revista científica

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