Abstract

HERNANDEZ-ARIAS, A. N. et al. Escherichia coli bacteria inactivation employing ozone and ultraviolet radiation using a reactor with continuously flowing water. J. appl. res. technol [online]. 2019, vol.17, n.3, pp.195-202.  Epub Apr 16, 2020. ISSN 2448-6736.

The study on the inactivation of Escherichia coli (E. coli) bacteria in water flowing continuously in a treatment system based on two different reactors is presented. The bacteria inactivation is achieved in a water volume of 500 mL inoculated with an E. coli concentration of 1.45×103 bacteria/mL using combined treatment with ozone and ultraviolet (UV) radiation. Inoculated water firstly is introduced to cylindrical reactor supplied with ozone at a concentration of 1000-1100 ppm and, subsequently, transferred to a rectangular geometry reactor subjected to UV radiation with an energy per volume of 1.44 J/mL. Inactivation efficiency of E. coli bacteria in the water of 99.32% was attained in a total treatment time of 180 seconds.

Keywords : Water; Escherichia coli; inactivation; ozone; ultraviolet radiation.

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