Effects of Different Operation Conditions on Continuous Generation of Slightly Acidic Electrolyzed Functional Water

Abstract:

The effects of the different operation conditions such as the voltage supplied to the electrodes, the flux of the hydrochloric acid solution, the pH value of the raw water and hydrochloric acid solution concentration on the available chlorine content, the pH value and the electrical conductivity of the slightly acidic electrolyzed functional water (SAEFW) were investigated with a continuous electrolyzed functional water generating system which was independently developed. The results showed that the available chlorine concentration of the SAEFW increased significantly with the increase in the voltage in the range of 3~5 V (P<0.01), but the influences of the voltage on the pH value and the electrical conductivity of the SAEFW were not noticeable (P>0.05). It was also found that the available chlorine and the electrical conductivity of the SAEFW also increased significantly with the increase in the flux of the hydrochloric acid, solution, but the pH value of the SAEFW decreased obviously when the flux of the hydrochloric acid solution increased (P<0.01). In addition, as the pH value of the raw water rose, the pH value and the electrical conductivity of the SAEFW increased and decreased significantly, respectively (P<0.01). However, the effect of the pH value of the raw water on the available chlorine of the SAEFW was not significantly different (P>0.05). At last, the available chlorine concentration and electrical conductivity of the SAEFW increased with the increase of the hydrochloric acid solution concentration, on the contrary, the pH value decreased (P<0.01). 