Optimization of operational parameters using central composite design in the peroxi‐alternating current‐electrocoagulation process for the pollutant removal with determination of power consumption from industrial wastewater

The utilization of electrochemical and advanced oxidation technologies for industrial wastewater (IW) treatment has grown in popularity during the last two decades. The effectiveness of several methods for treating IW, including hydrogen peroxide (H 2 O 2 ), direct‐current (DC) and alternating‐current (AC)‐electrocoagulation (EC), and the combination of H 2 O 2 with DC/AC‐EC (H 2 O 2 ‐DC/AC‐EC) processes were all investigated. In comparison to the H 2 O 2 , DC/AC‐EC, and H 2 O 2 ‐DC/AC‐EC technologies, the results showed that the H 2 O 2 ‐AC‐EC process produced 100% total colour and 100% chemical oxygen demand (COD) removal efficiency with a low power consumption of 4.4 kWhm −3 . The H 2 O 2 /AC‐EC technology was optimized for treating IW using a response surface methodology approach based on a central composite design using a five‐factor level. Utilizing statistical and mathematical techniques, the optimum parameters were determined to minimize consumption of power (1.02 kWhm −3 ) and maximum COD elimination (75%). The experimental parameters comprised the following: H 2 O 2 of 600 mg/L, current of 0.65 Amp, pH of 7.6, COD of 1600 mg/L, and treatment time (TT) of 1.26 h. When using a Fe/Fe electrode combination with the wastewater pH of 7, the COD removal efficiency was shown to be enhanced by increasing the TT, current and H 2 O 2 , and decreasing the COD concentration. The synergistic impact, quantified as the combined efficiency of eliminating % COD utilizing the H 2 O 2 , AC‐EC, and H 2 O 2 /AC‐EC procedures, was found to be 15.75%. Therefore, employing a hybrid H 2 O 2 ‐AC‐EC approach is considerably more effective in treating IW.