REMOVAL OF COD AND COLOR FROM DISTILLERY SPENT WASH BY ELECTROCOAGULATION USING ALUMINIUM AND IRON AS ELECTRODES

Distillery effluent is characterized with with suspended solids, inorganic solids, high chemical oxygen,biochemical oxygen demand, color and low in pH. The main aim of the work is on removal of COD and Color from distillery spent wash by electro coagulation. The treatment of distillery wastewater is carried out by electro coagulation using electrodes of aluminium and iron as anode and cathode respectively. Experiment was carried in a batch operation and it consisting of electrodes, direct current supply system and a magnetic stirrer unit. Individual effect of pH, voltage and distance between the electrodes are determined. For every 90 minutes, samples were drawn and COD and color was measured. Optimum conditions were obtained at pH = 9, distance = 3 cm and voltage = 15 V. At optimum condition 97.1 % of COD is reduced and 96.46 % of color is reduced. Results shows that at lesser distance between the electrodes and at higher pH ,voltage maximum removal efficiency are found.