Design development of an electrocoagulation reactor for molasses process wastewater treatment

Abstract

The impact of electrode corrosion behaviour, reactor geometry and current density on electrocoagulation efficiency were investigated for the treatment of molasses process wastewater. Two laboratory-scale vertical plate electrocoagulation reactors were used for this investigation: the first being a low aspect ratio bath reactor with a low specific electrode area, while the other was a high aspect ratio column reactor with a high specific electrode area. Anomalous anodic dissolution and cathodic corrosion of the aluminium electrodes both contributed significantly to overall metal consumption. Increasing specific electrode area and aspect ratio each led to improved treatment efficiency, whereas the impact of current density was more complicated involving the combined influences of several competing effects. The space-time yields of coagulant and bubbles (both functions of specific electrode area, current density and current efficiency) were found to influence mixing within the reactor and thus treatment efficiency.

Electrocoagulation in Wastewater Treatment

“…This operation was completed using a vertical plate electrocoagulation treating molasses process wastewater [21]. Rodrigo et al developed model for wastewater pollution considering hydrodynamic conditions using chemical reaction of reagents and pollutants, where a multivariable modeling of anodes was described.…”

Integrated electrocoagulation-electrooxidation process for the treatment of soluble coffee effluent: Optimization of COD degradation and operation time analysis

“…Finally, metal hydroxides and flocs are easily separated from aqueous media by sedimentation or flotation (Barrera-Díaz et al, 2011). EC methods have been used successfully to remove color (Kliaugaite et al, 2013;Robi c and Miranda, 2010) and pollutants from food industry wastewater (Gadd et al, 2010;Gengec et al, 2012;Thirugnanasambandham et al, 2016). However, as far as we know, their application for the treatment of soluble coffee effluents is very scarce in the literature.…”

Development of novel electrocoagulation reactor (ECR) for turbidity removal and decolorization from textile industry wastewater

“…In this section, three baffles with same length of 90 % selected for evaluating effect of The main reason which made EC sets inside reactor reduces the meantime has 2 reasons including the theory of geometry and the mixing by a gas bubble. According to Gadd et al (2010) proved that bauble generation from EC process can be enhancing the mixing inside the reactor so that the mean time could help to reduce the meantime.…”