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Article

Perforated Baffles for the Optimization of Disinfection Treatment

Faculty of Engineering and Architecture, University of Enna “Kore”, Cittadella Universitaria, 94100 Enna, Italy
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Water 2020, 12(12), 3462; https://doi.org/10.3390/w12123462
Received: 20 November 2020 / Revised: 30 November 2020 / Accepted: 7 December 2020 / Published: 9 December 2020
(This article belongs to the Special Issue Advanced Optimization of Wastewater Treatment Processes)
Water disinfection is one of the main treatments aimed at maintaining human health. Traditionally, the treatment takes place inside multichamber tanks that facilitate the contact between disinfectant and pathogenic microorganisms to be removed. However, the traditional contact tanks used for disinfection have geometric characteristics causing the formation of dead or recirculation zones that reduce treatment efficiency with potentially harmful effects on human health. This study proposes the creation of holes in the baffles that divide the various chambers in order to increase the mixing inside the reactor. In particular, various configurations with holes of different sizes were considered. The results obtained through fluid dynamics simulations based on the LES (large eddy simulation) model show that the jet emerging from the holes penetrates the recirculation zones, transforming them into areas of active mixing. The analysis of the hydraulic mixing indices traditionally used to evaluate the performance of these tanks shows that the presence of the holes allows a significant increase in the mixing efficiency by reducing the short-circuit phenomena and the entrapment of the disinfectant inside the dead zones. Parameters of fundamental importance are the size of the holes, the arrangement of the holes within the baffles and the perforation percentage. View Full-Text
Keywords: multichamber; disinfection; computational fluid dynamics (CFD); perforated baffles; hydraulic efficiency multichamber; disinfection; computational fluid dynamics (CFD); perforated baffles; hydraulic efficiency
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MDPI and ACS Style

Bruno, P.; Di Bella, G.; De Marchis, M. Perforated Baffles for the Optimization of Disinfection Treatment. Water 2020, 12, 3462. https://doi.org/10.3390/w12123462

AMA Style

Bruno P, Di Bella G, De Marchis M. Perforated Baffles for the Optimization of Disinfection Treatment. Water. 2020; 12(12):3462. https://doi.org/10.3390/w12123462

Chicago/Turabian Style

Bruno, Paolo, Gaetano Di Bella, and Mauro De Marchis. 2020. "Perforated Baffles for the Optimization of Disinfection Treatment" Water 12, no. 12: 3462. https://doi.org/10.3390/w12123462

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