Investigation of Integrated Sono-direct and Sono-alternative Current Electro Coagulation process for the treatment of Domestic wastewater

Abstract

Integrated sono-alternative and direct current Electrocoagulation process is simple technology needed in the treatment of domestic wastewater only by applying electric current with sacrificial electrode. The main objective of this study was to analyze the influence of Integrated Sono Alternative and Direct –current on electrocoagulation process in terms of percent COD, percent color and percent turbidity removal from domestic wastewater. Furthermore; this study was conducted to explore and to capture the application of Sono Alternative and Direct current electrocoagulation process in terms of percent color removal efficiency by UV spectrophotometer, percent Turbidity removal efficiency by turbidometery and percent COD removal efficiency by COD digester and using chemical that may use for the determination of COD removal along with electrical energy consumption. The data obtained from the laboratory were analyzed by using Response Surface Methodology (RSM). The percentage of COD, color and turbidity removal was about 82.6%, 97.5 and 95.28% respectively with Direct – Current Electrocoagulation (DCE),For Alternating–Current Electrocoagulation (ACE), it was 86.58%, 98.3% and 96.2%, respectively and COD ,color and turbidity removal were about 88.6%, 98.7 and 98.27 %with sono-direct current (SDCE) and 92.5%, 99.9% and 99.76%, with sono alternative current(SACE), at the optimal experimental condition of COD – 960 mg/L, initial wastewater pH – 6.8, current density – 0.4 A/dm2, inter–electrode spacing – 1 cm, combination of electrode – Al/Al, and treatment time 1 hr. The ACE and SACE wer more successful in eliminating %COD, % color and %turbidity with less electrical energy consumption than DCE and SDCE process In DCE and SDCE, the formation of an impermeable oxide layer on the cathode and the occurrence of corrosion on the anode due to oxidation have decreased the efficiency of this process compared to the ACE and SDCE process. As a result, experimental findings have shown that with less electrical energy usage and process efficiency, the ACE and SACE could be a more promising solution to removing pollutants from wastewater and domestic effluent than the DCE and SDCE method