Abstract
As a novel broad-spectrum disinfectant, acidic electrolyzed water (AEW) has been widely used, but it is generated on-site for one-time used and usually not stored. but “producing once for using once” is not a convenient mode for industrial application. This study focused on modeling the degradation of the available chlorine concentration (ACC) of AEW during storage and its ability to disinfect a dual-species biofilm formed by Salmonella Enteritidis and Pseudomonas fluorescens. The results showed that temperature had no significant effect on the ACC, while the ACC gradually decreased with time. The degradation process of the ACC could be fitted very well using the Weibull model. Dual-species biofilms comprising S. Enteritidis and P. fluorescens were inactivated by 20 and 40 mg/L AEW. The number of viable cells on stainless steel gradually decreased as the treatment time increased. Immersion for 10 and 30 min led to > 2 log CFU/cm2 and 4.5 log CFU/cm2 in decrease of the cells in dual-species biofilms when treated with 20 and 40 mg/L AEW, respectively. In addition, the dual-species biofilm displayed more resistance than the single-species biofilm. The findings presented herein could provide useful information for the application of AEW in food processing environments.
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