2007 Volume 8 Issue 3 Pages 139-145
The inactivation of Escherichia coli K-12 by pulsed electric field was investigated using textile electrode with combination of polyester fiber and titanium wire. Inactivation effect was depended on the applied voltage, wire gap length of textile electrode, solution conductivity, electrode surface area, and liquid flow rate. The survival ratios of E. coli K-12 decreased with an increase of applied voltage. The Inactivation effect was greatly influenced with solution conductivity, and higher efficiency of PEF was achieved when the solution conductivity was 0.22 mS/cm, but wire diameter did not affect to the inactivation. As the gap length of electrode was becoming narrow, the wire density of textile electrode was higher, the sufficient effect on sterilization of E. coli K-12 was observed. The survival ratio reduction was depended on the liquid flow rate, and the sterilization efficiency with number of recirculation was higher at the liquid flow rate 40 mL/min than at 160 mL/min.
