Abstract:

In order to investigate the disinfection effect of chlorine dioxide combined with ultrasonic treatment on Escherichia coli, Staphylococcus aureus, Bacillus subtilis on egg surface, chlorine dioxide with various concentrations (0, 30, 40, 50 mg/L and 60 mg/L), with and without 59 kHz of ultrasound was used to treat eggs for 1, 5 min and 10 min, respectively. A synergistic effect of chlorine dioxide and 59 kHz of ultrasonic treatment on the death of bacteria on egg surface was observed. Bactericidal capacity of chlorine dioxide at the concentration of 50 mg/L assisted with 59 kHz of ultrasonic treatment for 10 min was more than 4.00 (lg(CFU/ml)) to three kinds of bacteria. Moreover, it was only required for 5 min to achieve 4.00(lg(CFU/ml)) of bactericidal capacity to E. coli and Staphylococcus aureus under the combinatorial treatment of chlorine dioxide at the concentration of 50 mg/L associated with 59 kHz of ultrasound.

Key words: chlorine dioxide, ultrasound, disinfection