Photo‐Alternating Current‐Electro‐Fenton Process for Pollutant Removal and Energy Usage from Industrial Wastewater: Response Surface Approach Optimization of Operational Parameters
Perumal Asaithambi, Mamuye Busier Yesuf, Rajendran Govindarajan, Subramaniapillai Niju, C. Arun, Selvakumar Periyasamy, T. Pandiyarajan, Esayas Alemayehu
Abstract
Abstract During the last two decades, there has been an increase in interest the use of electrochemical and advanced oxidation technologies for treatment of industrial wastewater. Efficacy of several techniques for treating distilling industry wastewater (DIW), UV light, H 2 O 2 , combination of UV and H 2 O 2 , direct current (DC) and alternating current (AC)‐electro‐Fenton (EF), and UV combined with DC/AC+EF (UV+DC/AC+EF) processes were all examined. The findings revealed that compared to the UV, H 2 O 2 , UV/H 2 O 2 , DC/AC+EF, and UV+DC+EF technologies, the UV+AC+EF process resulted total color of 100 % and COD of 100 % elimination efficiency with low energy use 4 kWhr m −3 . A response surface methodology (RSM) approach that relies on central composite design (CCD) was used to optimize the UV+AC+EF technology‘s parameters for treating DIW. Optimal conditions were obtained by utilizing mathematical and statistical methods in order to maximize COD elimination (89.50 %) and minimize energy consumption (2.775 kWhr m −3 ). The parameters for this experiment were as follows: UV power: 32 W, H 2 O 2 : 320 mg L −1 , COD: 2400 mg L −1 , CD: 0.2 A dm −2 , and duration: 111 min. The combined efficiency of removing % COD using the UV, AC+EF, and UV+AC+EF processes was used to determine the synergistic effect, which was 13.65 %. As a consequence of this, treating industrial wastewater with a hybrid UV+AC+EF technique is significantly more successful.