フッ素系イオン交換膜を用いた電気透析法による大腸菌の殺菌

Disinfection effects of electrodialysis systems using a cationic type fluorinated membrane (Nafion-415) on E. coli cells have been investigated.
E. coli suspended in various electrolyte solution (108 cells/cm3) were passed through a desalting chamber at a flow rate of 3 cm/min at different current densities, and viability (%) in the effluents was determined.
Remarkable disinfection effects were observed for the Nafion-415 system compared with the system of a usual cation-exchange membrane (CMV). For example, the E. coli cells suspended in 0.1 mol⋅dm-3 NaCl solution were perfectly devitalized after 20 min of the electrodialysis at the current density of 1.63 A/dm2.