Electrochemical (EC) oxidation of distillery wastewater with low (BOD 5 /COD) ratio was investigated using aluminum plates as electrodes. The effects of operating parameters such as pH, electrolysis duration, and current density on COD removal were studied. At a current density of 0.03 A cm -2 and at pH 3, the COD removal was found to be 72.3%. The BOD 5 /COD ratio increased from 0.15 to 0.68 for an optimum of 120-min electrolysis duration indicating improvement of biodegradability of wastewater. The maximum anodic efficiency observed was 21.58 kg COD h -1 A -1 m -2 , and the minimum energy consumption observed was 0.084 kWh kg -1 COD. The kinetic study results revealed that reaction rate (k) decreased from 0.011 to 0.0063 min -1 with increase in pH from 3 to 9 while the k value increased from 0.0035 to 0.0102 min -1 with increase in current density from 0.01 to 0.03 A cm -2 . This study showed that the COD reduction is more influenced by the current density. The linear and the nonlinear regression models reveal that the COD reduction is influenced by the applied current density.

Textile industries generate various types of wastewater depending on the industrial process and the raw materials used such as jute, cotton and animal fibers (wool and silk)

Abstract-Electrochemical, COD was reduced by 52%, 63% and 71% respectively; Color was reduced by 41%, 55%, 77% respectively. The biodegradability was improved because of the increase BOD/COD ratio from 0.1 to 0.58. It was observed that increasing the electrolysis time and increased current density bring down the concentration of pollutants. COD removal and energy consumption rates are discussed. Kinetics for COD removal is also discussed. It can be concluded from the results that SS as an anode found to be effective in treating this electrolyte and could be effectively used for pretreatment of textile dye wastewater.

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