Optimization of semi-aerobic stabilized leachate treatment using ozone/Fenton's reagent in the advanced oxidation process

An advanced oxidation study using Fenton's reagent, i.e., ferrous sulfate and hydrogen peroxide was carried out for studying oxidation of eosin dye. Effects of concentration of various reagents on the degradation of dye were explored during an advanced oxidation process. It was found that ferrous concentration plays a major role in dye decomposition. Rate of dye decomposition is faster with an increase in ferrous sulfate concentration compared to the increase in hydrogen peroxide concentration. A detailed kinetic model was proposed. Profiles for eosin, hydrogen peroxide and various intermediates were also generated. The rate constant of the reaction of eosin with a hydroxyl radical was found to be of the order of 109 l/mol.s.

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Ozone catalysed with solids as an advanced oxidation process for landfill leachate treatment

Water Science & Technology ◽

10.2166/wst.2007.414 ◽

2007 ◽

Vol 55 (12) ◽

pp. 237-243 ◽

Cited By ~ 5

Author(s):

C. Tizaoui ◽

L. Mansouri ◽

L. Bousselmi

Keyword(s):

Advanced Oxidation Process ◽

Catalyst Concentration ◽

Oxidation Process ◽

Advanced Oxidation ◽

Catalytic Ozonation ◽

Expanded Perlite ◽

Landfill Leachates ◽

Leachate Treatment ◽

Gas Concentration ◽

Heterogeneous Catalytic

Heterogeneous catalytic ozonation (HCO) of wastewater is gaining both research and industrial interests. It is proved to be an advanced oxidation process since it involves hydroxyl radicals as oxidation species. Few studies have been carried out to test HCO in the treatment of landfill leachates. This work has been carried out to test three types of catalysts: activated carbon (AC), expanded perlite (EP) and titanium dioxide (TiO2) combined with ozone at 80 g/m3 gas concentration for the treatment of a leachate generated by Jebel Chakir landfill site near Tunis–capital of Tunisia. The work has shown a reduction in COD of about 45% and an increase in biodegradability (BOD5/COD) from 0.1 to 0.34. A catalyst concentration of 0.7 g/L was found optimal for the treatment of the leachate.

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Comparison of Landfill Leachate Treatment Efficiency Using the Advanced Oxidation Processes

Archives of Environmental Protection ◽

10.2478/aep-2013-0016 ◽

2013 ◽

Vol 39 (2) ◽

pp. 107-115 ◽

Cited By ~ 4

Author(s):

Barbara Pieczykolan ◽

Izabela Płonka ◽

Krzysztof Barbusiński ◽

Magdalena Amalio-Kosel

Keyword(s):

Hydrogen Peroxide ◽

Organic Compounds ◽

Advanced Oxidation Processes ◽

Potassium Dichromate ◽

Advanced Oxidation ◽

Fenton’S Reagent ◽

Nitrogen And Phosphorus ◽

Leachate Treatment ◽

Fenton's Reagent ◽

Oxidation Processes

Abstract Treatment of leachate from an exploited since 2004 landfill by using two methods of advanced oxidation processes was performed. Fenton’s reagent with two different doses of hydrogen peroxide and iron and UV/H2O2 process was applied. The removal efficiency of biochemically oxidizable organic compounds (BOD5), chemically oxidizable compounds using potassium dichromate (CODCr) and nutrient (nitrogen and phosphorus) was examined. Studies have shown that the greatest degree of organic compounds removal expressed as a BOD5 index and CODCr index were obtained when Fenton’s reagent with greater dose of hydrogen peroxide was used - efficiency was respectively 72.0% and 69.8%. Moreover, in this case there was observed an increase in the value of ratio of BOD5/CODCr in treated leachate in comparison with raw leachate. Application of Fenton’s reagent for leachate treatment also allowed for more effective removal of nutrients in comparison with the UV/H2O2 process.

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