LAUSR

Abstract To ensure the safety of freshwater which is the priority concern of the general public, it is necessary to inactivate pathogens effectively using innovative methods to disinfect freshwater. A new perspective for disinfection application of slightly acidic electrolyzed water was proposed in this study, namely the disinfection methods of “liquid-liquid”. The effects of freshwater disinfection using slightly acidic electrolyzed water by means of continuously dynamic hybrid was evaluated. Under the different conditions of mixture, parameters variation characteristics of slightly acidic electrolyzed water including available chlorine concentration, pH and oxidation-reduction potential showed small fluctuations within a certain range and remained relatively stable. Compared with static mixture, the method of continuously dynamic hybrid had better sterilization effect. Under condition of static mixture, the disinfection effect of slightly acidic electrolyzed water to freshwater followed more sophisticated dynamic model. At different volume ratios, the correlation coefficients (R2) were all greater than 0.9, which means that the model has good prediction effect. Under condition of dynamic hybrid, the variation of available chlorine concentration kept in a dynamic balance, which is in conformity with the zero-order kinetics model. The disinfection effect of slightly acidic electrolyzed water to freshwater followed first-order kinetic model, which also has better forecasting effect. The increase of temperature within limits contributed to promoting disinfection effect of slightly acidic electrolyzed water. But the disinfection effect became worse along with the increase of turbidity. The Escherichia coli (E. coli) inactivation effect under condition of mixture rendered slightly acidic electrolyzed water a promising disinfectant, which can be applied in freshwater to control natural microbiota.