Effect of voltage and oxygen on inactivation of E. coli and S. typhi using pulsed dielectric barrier discharge.

Autor: Rodríguez-Méndez BG; Instituto Nacional de Investigaciones Nucleares, Carretera México-Toluca S/N, Ocoyoacac, Estado de México C.P. 52750, Mexico. Electronic address: benjamin.rodriguez@inin.gob.mx., Hernández-Arias AN; Tecnológico de Estudios Superiores de Tianguistenco, Carretera Tenango, Santiago-La Marquesa 22, Santiago Tilapa, Estado de México C.P. 52650, Mexico., Gutiérrez-León DG; Universidad Politécnica de Guanajuato, Avenida Universidad Sur 1001, Comunidad Juan Alonso, Cortázar, Guanajuato C.P. 38496, Mexico., López-Callejas R; Instituto Nacional de Investigaciones Nucleares, Carretera México-Toluca S/N, Ocoyoacac, Estado de México C.P. 52750, Mexico., Mercado-Cabrera A; Instituto Nacional de Investigaciones Nucleares, Carretera México-Toluca S/N, Ocoyoacac, Estado de México C.P. 52750, Mexico., Jaramillo-Sierra B; Tecnológico de Estudios Superiores de Tianguistenco, Carretera Tenango, Santiago-La Marquesa 22, Santiago Tilapa, Estado de México C.P. 52650, Mexico., Peña-Eguiluz R; Instituto Nacional de Investigaciones Nucleares, Carretera México-Toluca S/N, Ocoyoacac, Estado de México C.P. 52750, Mexico., Valencia-Alvarado R; Instituto Nacional de Investigaciones Nucleares, Carretera México-Toluca S/N, Ocoyoacac, Estado de México C.P. 52750, Mexico., Alcántara-Díaz D; Instituto Nacional de Investigaciones Nucleares, Carretera México-Toluca S/N, Ocoyoacac, Estado de México C.P. 52750, Mexico.
Jazyk: angličtina
Zdroj: Bioelectrochemistry (Amsterdam, Netherlands) [Bioelectrochemistry] 2021 Oct; Vol. 141, pp. 107879. Date of Electronic Publication: 2021 Jun 24.
DOI: 10.1016/j.bioelechem.2021.107879
Abstrakt: This work presents the study of the voltage and oxygen effect on bacterial inactivation in water using a pulsed dielectric barrier discharge (DBD) under atmospheric pressure, where Escherichia coli (E. coli) and Salmonella typhi (S. typhi) bacteria were used as model microorganisms. A cylindrical DBD reactor was developed and tested in applications to assay the efficiency of bacterial inactivation in water on a volume of 500 mL flowing continuously throughout the system assisted with a peristaltic pump at 4.4 ± 0.1 mL/s. The efficiency of the treatment reached a 6-log 10 reduction for both E. coli and S. typhi bacteria at 10 6 CFU/mL of concentration at the end of the first cycle of treatment at a minimum voltage of 12 kV with oxygen bubbling gas, concluding that there was a minimum voltage to produce inactivation of E. coli and S. typhi samples. Bacterial inactivation without the oxygen condition contrasted with the high rate of inactivation with oxygen at relatively low voltage discharges.
Competing Interests: Declaration of Competing Interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2021 Elsevier B.V. All rights reserved.)
Databáze: MEDLINE
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