Dye Removal, Energy Consumption and Operating Cost of Electrocoagulation of Textile Wastewater as a Clean Process

Abstract

In this research, the efficiency of electrocoagulation treatment process using aluminum electrodes to treat synthetic wastewater containing Reactive Red198 (RR198) was studied. The effects of parameters such as voltage, time of reaction, electrode connection mode, initial dye concentration, electrolyte concentration, and inter electrode distance on dye removal efficiency were investigated. In addition, electrical energy consumption, electrode consumption, and operating cost at optimum condition have been investigated. The results showed that dye and chemical oxygen demand removals were 98.6 and 84%, respectively. Electrode consumption, energy consumption and operating cost were 0.052 kg/m 3 , 1.303 kWh/m 3 and 0.256 US$/m 3 , respectively. Dye removal kinetic followed first order kinetics. It can be concluded that electrocoagulation process by aluminum electrode is very efficient and clean process for reactive dye removal from colored wastewater.

Remediation of Feedlot Nutrients Runoff by Electrocoagulation Process

“…2). The increased pH in electrocoagulation solution was likely due to the excess hydroxyl ions produced at the cathode and liberation of free OH- (Dalvand et al, 2011;Feng et al, 2007). In this study, following electrocoagulation, the pHs of the electrocoagulation solution increased except for 10 V Al-Fe electrodes and 5 V Al-Al electrodes.…”

Removal of Reactive Red 24 Dye by Clean Electrocoagulation Process Using Iron and Aluminum Electrodes

“…Also, as pH increases the dissolved iron weight during the electrocoagulation process increases due to the formation of iron hydroxide species which absorb the dye molecules and causes the increase of the removal efficiency. The effect of pH on the process performance is explained as follows: the dominant iron species are different according to the solution pH; at basic pH, dye removal efficiency is increased as concentration of OH -ion increases which help in formation of different iron hydroxide complexes [38][39][40]. Table 2(b) display the removal efficiency of the dye and COD is high in acidic electrolyte using aluminum electrodes.…”

Electrocoagulation of Azo-2-Naphthol Dye Using Aluminium Electrodes: Effect of Solvent and Kinetics of Adsorption

“…These include, electrode material (Bagga et al, 2008;Gomes et al, 2007;Chou et al, 2009) inter-electrode spacing (Dalvand et al, 2011), current density (Arslan-Alaton et al, 2008), initial concentration/dose (Mouedhen et al, 2008;Mkpenie et al, 2014), initial pH (Sasson et al, 2009;Irdemez et al, 2006), supporting electrolyte (Trompette and Vergnes, 2009), electrolysis/treatment time (Giwa et al, 2012;Avsar et al, 2012) and temperature (Katal and Pahlavanzadeh, 2011;Vasudevan et al, 2009a;Yilmaz et al, 2008a).…”