Volume No. 4 Issue No.: 1 Page No.: 90-100 July-Sept 2009

 

IMPROVEMENT OF BOD5/COD RATIO INPRE-TREATED DISTILLERY WASTE WATER BY ELECTROCHEMICAL TREATMENT METHOD

 

B.M. Krishna*, Usha N. Murthy1, B. Manoj Kumar, K.S. Lokesh and B. Savitha2

1. Department of Civil Engineering, UVCE, Bangalore University, JB campus, Bangalore-560056. (INDIA)
2. Department of Environmental Engineering, S. J. College of Engineering, Mysore - 570006. (INDIA)

 

Received on : April 20, 2009

 

ABSTRACT

 

Electrochemical oxidation of low (BOD5/COD) ratio post-methanation distillery wastewater was investigated. The effects of operating parameters like pH, electrolysis duration and current density on COD removal were studied. At a current density of 0.03 Ampere/cm2 and at pH 3 the COD removal was found to be 72%. The BOD5/COD ratio of pretreated distillery wastewater was 0.145 and increased to 0.686 for an optimum of 120 minutes electrolysis duration indicating improvement of biodegradability of wastewater. The TOC reduction is 8.77% at 180 minutes of electrolysis duration. The maximum anodic efficiency observed was 21.58 kg COD h-1A-1m-2 and the minimum energy consumption observed was 84.16 wh kg-1 COD. The kinetic study reveals that reaction rate (k) decreases with increase in pH and increases with increase in current density.

 

Keywords : Electrochemical, Treatment, Distillery, Wastewater, Aluminum, Electrode.

 

 

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