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Treatment of semi-aerobic landfill leachate using durian peel-based activated carbon adsorption- Optimization of preparation conditions

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Author(s): Mohamad Anuar Kamaruddin, Mohd Suffian Yusoff, Mohd Azmier Ahmad

Journal: International Journal of Energy and Environment
ISSN 2076-2895

Volume: 3;
Issue: 2;
Start page: 223;
Date: 2012;
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Keywords: Activated carbon; CCD; COD; Colour; Leachate

ABSTRACT
The treatability of semi-aerobic landfill leachate parameters using durian peel-based activated carbon (DPAC) was investigated. An ideal experimental design was conducted based on central composite design (CCD) using response surface methodology to evaluate individual and interactive effects of operational variables namely activation temperature, activation time and carbon dioxide (CO2) flow rate on treatment performance in terms of chemical oxygen demand (COD) and colour removal efficiencies. The DPAC was prepared using physical activation method which consists of CO2 gasification. The adsorptions of COD and colour were described by Langmuir and Freundlich isotherm models. Based on the CCD, quadratic model was developed to correlate preparation variables to the two responses. The optimum DPAC preparation conditions were obtained using 800 °C activation temperature, 2.1 h activation time and 68.68 ml/s of CO2 flow rate. From the experimental work, the maximum removal of COD and colour obtained were 41.98 and 39.86%, respectively.
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