REMOVAL OF COD & COLOUR FROM DISTILLERY WASTE WATER USING FENTON OXIDATION

Abstract

The sugar cane molasses based distillery waste water leads to an environmental pollution due to the presence of high biochemical, chemical oxygen demand (BOD and COD) and colour. So this must be treated to meet the regulatory discharge standards. In the present work, we have focused our attention on the removal of COD and colour of distillery waste water using Fenton oxidation. It was found that the use of Fenton oxidation permitted a high reduction of COD and decolourization of distillery waste water. The distillery waste water has an initial pH 3.96, COD of 160000 mg/l and colour 140000 PCU and was treated by Fenton oxidation using Fez and H2O2 solution. Batch experiments were conducted to investigate the optimum operating conditions of various parameters such as pH, doses of H202 and FeSO4, temperature and reaction time as well as the effcet of these parameters on percentage removal of COD and colour. The experimental results showed that Fenton oxidation was most effective treatment method for treatment of distillery waste water which remove COD and colour of 92% and 85% respectively. The kinetic stuides show a first order kinetic for degradation of organic components. The rate constant and activation energy were also founn from batch experimental data.