Aerobic bacteria grow mostly at an ORP range of þ200 to þ800 mV, while anaerobic bacteria grow well at 700 to þ200 mV. The high ORP in the EW could alter the metabolic fluxes and ATP production, probably due to the change in the electron flow in cells. AEW has a surface-active effect due to the presence of dilute NaOH, dissolved H2, and active H2