The Optimization of Operational Variables of Electrochemical Water Disinfection Using Response Surface Methodology

The electrochemical treatment of canal water was investigated in a batch-wise system the presence stainless steel 316-grade electrodes. Three effective process parameters, including current density, reaction time, and electrode spacing, were evaluated range 0.25–2.5 mA/cm2, 1–10 min, 0.5–2.5 cm, respectively. Operational variables disinfection are optimized response surface methodology (RSM) using Box–Behnken design. Before disinfection, pretreatment coagulants mixing for turbidity removal conducted. Results revealed that 10 ppm dosage Ferric chloride (FeCl3.6H2O) alum (Al2(SO4)3·16H2O) at neutral pH is appropriate. Furthermore, RSM analysis shows interelectrode spacing most prominent factor affecting performance, increasing inversely affects efficiency. 1.52 mA/cm2 6.35 min 1.13 cm optimum conditions, resulting statistically 98.08% total coliform. energy required electrochemically conditions 0.256 kWh/m3.