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Landfill leachate treatment by electrochemical oxidation

M.J.K.,, Bashir and M.H.,, Isa and S.R.M.,, Kutty and Z.B.,, Awang and H.A.,, Aziz and S.,, Mohajeri and I.H., Farooqi (2009) Landfill leachate treatment by electrochemical oxidation. Waste Management, 29 (9). pp. 2534-2541. ISSN 0956053X

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Abstract

This study investigated the electrochemical oxidation of stabilized leachate from Pulau Burung semi-aerobic sanitary landfill by conducting laboratory experiments with sodium sulfate Na2SO4(as electrolyte) and graphite carbon electrodes. The control parameters were influent COD, current density and reaction time, while the responses were BOD removal, COD removal, BOD:COD ratio, color and pH. Na2SO4 concentration was 1 g/L. Experiments were conducted based on a three-level factorial design and response surface methodology (RSM) was used to analyze the results. The optimum conditions were obtained as 1414 mg/L influent COD concentration, 79.9 mA/cm2 current density and 4 h reaction time. This resulted in 70% BOD removal, 68% COD removal, 84% color removal, 0.04 BOD/COD ratio and 9.1 pH. Electrochemical treatment using graphite carbon electrode was found to be effective in BOD, COD and color removal but was not effective in increasing the BOD/COD ratio or enhancing biodegradability of the leachate. The color intensity of the treated samples increased at low influent COD and high current density due to corrosion of electrode material. © 2009.

Item Type:Article
Uncontrolled Keywords:BOD removal; BOD/COD ratio; COD removal; Color intensity; Color removal; Control parameters; Electrochemical treatments; Electrode material; Graphite carbon; High current densities; Laboratory experiments; Landfill leachate treatment; Leachate; Optimum conditions; Reaction time; Response Surface Methodology; Sanitary landfill; Three-level factorial design; Biochemical oxygen demand; Biodegradation; Color; Control system analysis; Electrochemical cells; Electrochemical electrodes; Electrochemical oxidation; Graphite; Graphite electrodes; Leaching; Refuse disposal; Sodium; Sodium sulfate; Leachate treatment; carbon; graphite; sodium sulfate; biochemical oxygen demand; biodegradation; chemical oxygen demand; electrochemistry; landfill; leachate; oxidation; waste treatment; article; biochemical oxygen demand; biodegradability; concentration process; decolorization; density gradient; electrochemical oxidation; electrode; factorial design; landfill leachate; oxidation; pH measurement; priority journal; reaction time; Analysis of Variance; Carbon; Electrochemical Techniques; Electrodes; Graphite; Kinetics; Organic Chemicals; Oxygen; Sulfates; Waste Management; Water Pollutants, Chemical; Asia; Eurasia; Indonesia; Pulau Burung; Southeast Asia
Subjects:T Technology > TA Engineering (General). Civil engineering (General)
Departments / MOR / COE:Departments > Civil Engineering
ID Code:19
Deposited By: Assoc Prof Dr Isa Mohd Tan
Deposited On:17 Feb 2010 04:30
Last Modified:19 Jan 2017 08:25

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