Reduction of chemical oxygen demand in distillery spent wash using electro-caogulation

Abstract

Are newed interest in electro-coagulation has spurred by the search for reliable, cost Effective method for the treatmen to polluted water.Electro-coagulation presented a Robust novel and innovative alternative in which a sacrificial metal a nodecorroded , due to an applied electric potential, with the simultaneous evolution of hydrogen at the Cathode which was removed by floatation. This had the major advantage of providing Active cautions required for coagulation, without increasing the salinity of water. Electro-coagulation is a complex process with a multitude of mechanisms operating Synergistically to remove the pollutants from the water. This research presented an in depth Discussion and consideration of factors that are the requirements for the optimum performance of this technology. The objective of the study was to lower chemical oxygen demand of the distillery spent wash from Bwendero dairy farm limited. This was achieved by allowing for the coagulation of the medallions from the corroded Aluminum anode and floatation of light materials by the hydrogen gas at an optimum pH, in an electric cell with hydrochloric acid an electrolyte. The original amount chemical oxygen demand(COD)was70,000mg/Land the results Showed the amount of 10,080mg/L at optimum pHof3, giving a percentage reduction In CODof85.6%