The effect of voltage gradient (15–30 V/cm) and holding time (45–150 s) were evaluated on electrode corrosion, energy consumption, thermal performance, pH change, electrical conductivity and inactivation of Escherichia coli in the well water during ohmic heating process. Results showed that the specific energy consumption increased with an increasing voltage gradient. The thermal performance and electrode corrosion were obtained between 67.16 and 75.12% and 0.06–8.32 mg/L, respectively. The pH of treatment samples was higher than the initial samples. The changes of electrical conductivity values were modeled as function of voltage gradient and sample temperature. No survived E. coli was observed at heating condition of 30 V/cm - 150 s.
