RT journal article
T1 Comparative Study of UV Radiation Resistance and Reactivation Characteristics of E. coli ATCC 8739 and Native Strains: Implications for Water Disinfection
A1 Duque-Sarango, Paola
A1 Romero Martínez, Leonardo
A1 Pinos-Vélez, Verónica
A1 Sánchez-Cordero, Esteban
A1 Samaniego, Esteban
A2 Tecnologías del Medio Ambiente
K1 wastewater reuse
K1 ultraviolet disinfection
K1 flow-through UV reactor
K1 photoreactivation
K1 Escherichia coli
AB In certain countries where fresh water is in short supply, the effluents from wastewatertreatment plants are being recycled for other uses. For quality assurance, tertiary disinfectiontreatments are required. This study aims to evaluate the inactivating efficacy with an ultraviolet (UV)system on fecal bacteria from effluents of urban wastewater treatment facilities and the post-treatmentinfluence of the environmental illumination. The effect from different UV doses was determinedfor native and standardized lyophilized strains of Escherichia coli right after the irradiation as wellas after 24 h of incubation under light or dark conditions. To achieve 3 log-reductions of the initialbacterial concentration, a UV dose of approximately 12 mJ cm−2is needed for E. coli ATCC 8739and native E. coli. However, there is a risk of the reactivation of 0.19% and 1.54% of the inactivatedorganisms, respectively, if the treated organisms are stored in an illuminated environment. Thissuggests that the post-treatment circumstances affect the treatment success; storing the treated waterunder an illuminated environment may pose a risk even if an effective inactivation was achievedduring the irradiation
SN 2071-1050
YR 2023
FD 2023
LK http://hdl.handle.net/10498/31465
UL http://hdl.handle.net/10498/31465
LA eng
DS Repositorio Institucional de la Universidad de Cádiz
RD 06-nov-2026