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Predicting the bactericidal efficacy of solar disinfection (SODIS): from kinetic modeling of in vitro tests towards the in silico forecast of E. coli inactivation

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journal contribution
posted on 22.12.2021, 11:19 by Sofia Samoili, Giulio Farinelli, José Á Moreno-SanSegundo, Kevin McGuiganKevin McGuigan, Javier Marugán, César Pulgarín, Stefanos Giannakis
In this study, the possibility of predicting the efficacy of Solar water disinfection (SODIS) for the removal of bacterial pathogens was assessed by the development of a three-level plan: firstly, systematic E. coli inactivation was performed (in vitro) in Lake Geneva water, under otherwise controlled conditions of water temperature (20–50 °C), sunlight intensity (0–1200 W/m2), presence of natural dissolved organic matter (DOM, 0–6 mg/L) and turbidity (0–50 NTU). As a second step a kinetic evaluation led to the selection of the most relevant parameters to be included in a novel static and dynamic model theoretical formulation. The static and dynamic models reliably described the experimental findings (bacterial inactivation under various climatic conditions) and were considered as equally eligible candidates for disinfection modeling. The final step considered ambient temperature, incident radiation and cloud-cover data to forecast (in silico) SODIS efficacy in Africa as a case study. The simulation results were compared with the experimental data and indicated that most African regions are suitable for SODIS processes, but there are areas of risk correlated with climatological conditions (cloud-cover and temperature). The results of this study could be applied for regional in decision-making strategies for application of SODIS or in the search for viable alternatives to SODIS in cases where it is deemed unsuitable.

Funding

European project WATERSPOUTT H2020-Water-5c-2015 (GA 688928)

Swiss State Secretariat for Education, Research and Innovation (SEFRI-WATERSPOUTT, No.: 588141)

Spanish Ministry of Science, Innovation and Universities (MICIU) for the Ramón y Cajal Fellowship (RYC2018-024033-I)

History

Comments

The original article is available at https://www.sciencedirect.com/

Published Citation

Samoili S. et al. Predicting the bactericidal efficacy of solar disinfection (SODIS): from kinetic modeling of in vitro tests towards the in silico forecast of E. coli inactivation. Chem Eng J. 2022;427:130866

Publication Date

19 June 2021

Department/Unit

  • Physiology and Medical Physics

Research Area

  • Population Health and Health Services

Publisher

Elsevier BV

Version

  • Published Version (Version of Record)