2D and 3D electrochemical degradation (ECD) of raw cotton industry wastewater (CIWW) using stainless steel and aluminium electrodes

Abstract Two-dimensional (2D) and three-dimensional (3D) batch electrochemical degradation (ECD) of raw cotton industry wastewater (CIWW) was adopted using stainless steel (SS) aluminium (Al) electrodes. ECD as a treatment option aimed at removing priority quality parameters, viz. chemical oxygen demand (COD), colour, chloride, nitrate, etc. COD removal 85 80% were achieved by 3D SS 2D electrodes operated 6 V (0.9 A) for maximum electrolysis time (ET) 30 min. Similarly, 76 70% Al electrodes, respectively. Simultaneous colour in the system low 12 11% compared to system. Water total dissolved solids, phosphates, sulphate also removed (SS Al) Higher pollutant efficiencies observed min ET SS, Al, Al. Post-ECD slurry showed good settling characteristics generating dense sturdy flocs giving sludge volume index values other electrode options.