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Carbon Electrodes for the Electro Accumulation of Potassium from Distillery Spentwash

Eknath Alhat, Vishal Duraphe Dr. Deepali Nimbalkar and Vikram Ghole

Disposal of distillery effluent through evaporation followed by the incineration results in scale formation on the surface of the evaporation and boiler tubes decreasing the boiler & evaporator efficiency and increasing maintenance cost. The potassium content of scale is 2,756 mg/kg (588 mg/kg in ash). The contribution of other alkali metals to the scale is insignificant. Hence, it is essential to remove potassium from spent wash. The present paper describes the process of electro-accumulation of the potassium from distillery spent wash using carbon electrode. Experiments were done by varying time and current density and the results show that the percent reduction of potassium was maximum 26 % at 12 A. and 15 % at 9 A applied current density. Percent reduction in COD was found to be 33.6 % at 12 A and minimum 22.58 % at 9 A applied current density for one hour.