Physico-chemical treatment of bukit tagar sanitary landfill leachate using P-Floc775 and ferric chloride

Document Type

Article

Publication Date

1-1-2009

Abstract

Bukit Tagar Sanitary landfill leachate was characterized and then treated with ferric chloride and P-Floc775, individually. The raw leachate contained high concentration of BOD5 ( 27000 mg/L), COD ( 59000 mg/L ), NH 3-N (4300 mg/L ), Pb (15.15 mg/L), Al (15.75 mg/L ), Zn (17.55 mg/L ), Fe (84.3 mg/L ), Cu (10.95 mg/L) cd (11-25 mg/L) and As (3.6 mg/L). All these parameters exceeded the Malaysian regulatory standard limit of EQA 1974 (Standard A and B). Leachate treatment was optimum with 2g/500ml FeCl 3 at pH 7 and mixing speed 100 rpm. It was able to reduce about 100% of Cd, Pb and Cu to below the Environmental Quality (Sewage and Industrial Effluent) Regulation Standard B while Zn was reduced by 89% but was still above standard B. The optimum for P-Floc775 was 2ml/500ml, pH7 and mixing speed 90 rpm. Maximum removal of Cd and Cu was 100% which was below the Environmental Quality Regulation Standard B requirements. P-Floc775 was able to reduce Pb and Zn by 82% and 88%, respectively, which were still above Standard B. Further integrated leachate treatment is recommended to achieve the EQA regulation limits.

Keywords

Chemical treatment, landfill leachate, P-Floc775

Publication Title

Malaysian Journal of Science

ISSN

1394-3065

Divisions

InstituteofBiologicalSciences

Volume

28

Issue

2

Publisher

Faculty of Science, University of Malaya

Additional Information

Institute of Biological Sciences, Faculty of Science Building, University of Malaya, 50603 Kuala Lumpur, MALAYSIA

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