Title: Electrochemical treatment of semi-aerobic landfill leachate using Response Surface Methodology (RSM)

Authors: Mohamed Hasnain Isa, Tan Kuan Kee, Ali Akbar Zinatizadeh, Soraya Mohajeri, Hamidi Abdul Aziz, Yung-Tse Hung

Addresses: Civil Engineering Department, Universiti Teknologi PETRONAS, 31750 Tronoh, Perak, Malaysia. ' Civil Engineering Department, Universiti Teknologi PETRONAS, 31750 Tronoh, Perak, Malaysia. ' Civil Engineering Department, Universiti Teknologi PETRONAS, 31750 Tronoh, Perak, Malaysia. ' Civil Engineering Department, Universiti Teknologi PETRONAS, 31750 Tronoh, Perak, Malaysia. ' Civil Engineering Department, Universiti Teknologi PETRONAS, 31750 Tronoh, Perak, Malaysia. ' Civil Engineering Department, Universiti Teknologi PETRONAS, 31750 Tronoh, Perak, Malaysia

Abstract: This research investigated the effectiveness of electrochemical treatment in treating semi-aerobic landfill leachate. The electrolytic reactor assembly included a pair of aluminium electrodes, a power supply and NaCl as electrolyte. The interactive effects of initial COD, current density and reaction time on treated leachate quality were studied. Regression equations were developed using design-expert software and results were analysed using response surface methodology. At optimum conditions (2000 mg/L initial COD, about 17 mA/cm² current density, 4 h reaction time and 1 g/l NaCl), SCOD removal, BOD removal and colour removal were estimated to be 82.2, 81.5 and 95%, respectively.

Keywords: electrochemical treatment; electrolyte; aluminium electrodes; current density; semi-aerobic landfill leachate; RSM; response surface methodology; COD; chamical oxygen demand; BOD; biochemical oxygen demand; pH; colour; environmental pollution.

DOI: 10.1504/IJEP.2010.036930

International Journal of Environment and Pollution, 2010 Vol.43 No.4, pp.324 - 338

Published online: 16 Nov 2010 *

Full-text access for editors Full-text access for subscribers Purchase this article Comment on this article