Colour and COD removal of Distillery spent wash by using Electro coagulation Mr.Manoj.P.Wagh 1, Dr.P.D.Nemade

Abstract- Distilleries are one of the backbone industries of India contributing a fair amount to nations GDP. It also contributes to India’s export. Distillery industry consumes 12-15 l of water for one liter of alcohol production, generating 4.04 x 1010 liter of unwanted residual liquid waste called spent wash. Spent wash is a dark brown colour and very high organic loading, very high chemical oxygen demand (COD) and high Biochemical Oxygen demand (BOD). Thus distillery industries have a great adverse impact on the environment. Numbers of clean up technologies have been worked out to efficiently treat the distillery spent wash. In this paper, electro coagulation with aeration is carried out by using Aluminum and Iron electrodes in a batch reactor. The effects of operating parameter such as current density, pH, agitation speed, aeration were studied. By using iron electrodes, the maximum colour removal 99.78 % was observed at a 25 Voltage for pH 8. UV spectrophotometer was used to find out colour removal. Maximum COD removal was found to be 85.71 % at pH 3 for an electro coagulation time of 150 minutes