TREATMENT OF SANITARY LANDFILL LEACHATE BY ADVANCED OXIDATION PROCESS (FENTON)

This study was conducted to investigate the potential of Advanced Oxidation Process
(AOP) system, Fenton Process in removing Polycyclic Aromatic Hydrocarbon
(PAHs) and Chemical Oxygen Demand (COD) in landfill leachate. Resistant and
complex organic compounds in leachate such as PAHs formed by incomplete
combustion of garbage has detrimental effect on the environmental and human health
as PAHs is mutagenic, toxic and carcinogenic. The leachate samples were collected
at Jeram Sanitary Landfill, Selangor, Malaysia with average initial COD of
9100mg/L and pH of 8.21.The laboratory experiments were conducted based on the
design generated using Design-Expert software with control parameters, initial
COD (4900 mg/L-9100 mg/L), H2O2/Fe2+ (0.5-3.5), reaction time(60 min – 150 min)
and H2O2 (1000 mg/L-2000 mg/L). Response Surface Methodology (RSM) was
applied for optimising the operating conditions. 16 PAHs classified by United States
Environmental Protection Agency (US EPA) as the priority pollutants was detected
in the leachate sample after the Fenton treatment PAHs concentration were not
detected under optimum conditions. The optimum conditions for COD removal were
at 7700 mg/L initial COD, 1.5 H2O2/Fe2+ , 60 minutes reaction time and 1000 mg/L
H2O2 which resulted in 86.69% COD removal.