The Malaysian Journal of Analytical Sciences Vol 11 No 1 (2007): 198 – 205

 

 

REMOVAL OF COD AND TURBIDITY TO IMPROVE WASTEWATER QUALITY USING ELECTROCOAGULATION TECHNIQUE

 

Moh Faiqun Ni’am¹  , Fadil Othman²   , Johan Sohaili² , Zulfa Fauzia²

 

¹ Civil Engineering Department,

Universitas Islam Sultan Agung, Semarang, Indonesia

² Environmental Dept., Civil Engineering Faculty,

Universiti Teknologi Malaysia,  Johor, Malaysia

 

Abstract

Electrocoagulation  (EC) is becoming a popular process to be used for wastewater treatment. The removal of  COD and turbidity  from  wastewater  by  EC  using  iron  (Fe)  electrode material was  investigated  in  this  paper. Several working parameters, such as pH, current density, and operating time were studied in an attempt to achieve a higher removal capacity. Wastewater sample was made from milk powder with initial COD of 1140 mgL^-1 and turbidity of 491 NTU. Current density was varied from 3.51 to 5.62 mA cm^-2, and operating time of between 30 and 50 minutes. The results show t hat the effluent wastewater was very clear and its quality  exceeded the direct discharge standard. The removal efficiencies of COD and turbidity  were  high,  being  more  than  65%  and  95%.  In  addition,  the  experimental results also show  that  the electrocoagu lation can neutralize pH of wastewater.

 

Keywords : Electrocoagulation, Fe electrode, Removal efficiency, Wastewater treatment.

 

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