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Title: Physico-chemical treatment of Bukit Tagar sanitary landfill leachate using P-FLOC775 and ferric chloride
Authors: Said Nasser Ali Al-Abdali
Keywords: Physico-chemical
Sanitary landfill leachate
Leachate treatment
Municipal landfill leachate
Bukit Tagar
Issue Date: 2008
Publisher: University Malaya
Abstract: Sanitary landfill leachate is considered a heavily polluted wastewater. It contains high concentration of organic matter, heavy metals and toxic components. To treat leachate a combination of physical, biological and chemical treatment are often required to enhance the treatment efficiency. Coagulation/flocculation is a commonly used process in water and wastewater treatment. In this study, the characteristics of municipal landfill leachate from Bukit Tagar Landfill leachate was analyzed. The pH of the leachate sample was 6.6 while the BOD and COD of leachate were 27000 mg/L, 59000 mg/L, respectively. The concentration of Cd, Pb, Zn and Cu in the leachate was 11.25mg/L, 15.15mg/L, 17.55mg/L and 10.95 mg/L, respectively. The leachate contained high concentrations of colour (15300 ADMI), TSS (13.5 mg/L), and ammonia at (4300 ml/L. All parameters analyzed were above the Environmental Quality (Sewage and Industrial Effluent) Regulation Standard B limits. Jar-test experiments were employed to determine the efficiency of coagulant and flocculent FeCl3 and P-Floc775 at different concentrations, pH and mixing speed, in removing heavy metals, turbidity, colour and TSS from the leachate. After coagulation, the filtrates were digested and analyzed. Treatment with 2g/500mL of FeCl3 (which was the optimum) produced the highest reduction in turbidity (75%), colour (82%), TSS (78%), Cd, Pb, and Cu (100%) and Zn (91%). The optimal reduction of all parameters was at pH 7. On the other hand the optimum mixing speed for FeCl3 was 100 rpm and at 90 rpm for P-Floc775. At optimum coagulant dosage, pH and mixing speed Cd, Pb, and Cu were lower than the EQA Standard A and B limits, whereas the Zn remained above the Standard A and B. Mixing speed and pH improved the performance of FeCl3 and P-Floc775, at optimum dosage. FeCl3 and P-Floc775 were effective in the reduction of most parameters to below EQA 1979 limit.
Description: Dissertation -- Faculty of Science, University of Malaya, 2008.
URI: http://dspace.fsktm.um.edu.my/handle/1812/560
Appears in Collections:Masters Dissertations : Science

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