Gusmão, Isabel Celeste Caíres Pereira [UNESP]Moraes, Peterson Bueno [UNESP]Bidoia, Ederio Dino [UNESP]2022-04-282022-04-282010-01-01Brazilian Archives of Biology and Technology, v. 53, n. 5, p. 1235-1244, 2010.1516-8913http://hdl.handle.net/11449/226133The aim of this work was to investigate the disinfectant effect of electrolysis on chlorine-free water, artificially contaminated with Escherichia coli (CCT-1457) and to evaluate the bactericidal activity of electrolysis and kinetic behavior of a single-cell reactor, with a DSA (Dimensionally Stable Anode) electrode to develop a scaled-up system. A high-density E. coli suspension (106 CFU mL-1) was electrolyzed in this reactor at 25, 50 and 75 mA cm-2 for up to 60 min, at flow rates of 200 and 500 L h-1. Bacterial survival fell by 98.9% without addition of chlorinated compounds and a power consumption rate not more than 5.60 kWh m-2 at flow rate of 200 L h-1 and 75 mA cm-2. The process produced a germicidal effect that reached this inactivation rate within a relatively short contact time. Also, a solution of electrolyzed 0.08 M Na2SO4 added to the inoculum showed residual bactericidal effect. The efficiency of disinfection was regulated by both the contact time and current density applied, and a kinetic function for the survival rate was developed for the purpose of scaling up.1235-1244engBactericidal effectDSA oxide electrodeE. coli inactivationElectrochemical treatmentElectrolysis of microorganismsElectroxidation processArtigo10.1590/S1516-891320100005000302-s2.0-78649387376