Continuous-Flow Aqueous System for Heterogeneous Photocatalytic Disinfection of Gram-Negative Escherichia coli

Mejdi Kacem 1 Gael Plantard 1 Monica Brienza 2 Vincent Goetz 1
1 PROMES - Procédés, Matériaux et Energie Solaire
2 HSM - Hydrosciences Montpellier
Abstract : Within the global objective to develop a sustainable oxidative process based on heterogeneous photocatalysis, the possibility of combining solar UV irradiation and a supported semiconductor all while working in an open reactor running in continuous flow is a pertinent option. Here we investigated a heterogeneous photocatalytic disinfection process performed with a 2D-photocatalytic material implemented in an open-flow flat-plate reactor irradiated with a LED panel. Inactivation of Gram-negative Escherichia coli was attempted using different UV light flux densities and feed flow rates. Treatment capacities were calculated under steady-state conditions using a simple mass balance between inlet and outlet. For an irradiated surface of 1.5 × 10–2 m2, values ranged from 10 to 30 × 105 MPN h–1 L–1as a function of working conditions. With just a few adjustments, the model based on coupling mass transfer with phototocatalysis-driven bacterial inactivation developed previously in the case of a closed-batch cylindrical reactor was tested and extended with success.
Keywords : semiconductor UV irradiation photocatalysis process bacterial inactivation photocatalytic disinfection
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Journal articles
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https://hal-univ-perp.archives-ouvertes.fr/hal-01879027
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Submitted on : Friday, September 21, 2018 - 6:13:29 PM
Last modification on : Tuesday, May 28, 2019 - 1:48:07 PM

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UNIV-PERP | CNRS | AGROPOLIS | PROMES | UNIV-MONTPELLIER | B3ESTE

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Mejdi Kacem, Gael Plantard, Monica Brienza, Vincent Goetz. Continuous-Flow Aqueous System for Heterogeneous Photocatalytic Disinfection of Gram-Negative Escherichia coli. Industrial and engineering chemistry research, American Chemical Society, 2017, 56 (51), pp.15001 - 15007. ⟨10.1021/acs.iecr.7b03644⟩. ⟨hal-01879027⟩

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