Landfill leachate treatment by a photoassisted fenton reaction

1997 ◽  
Vol 35 (4) ◽  
Keyword(s):  
Landfill Leachate ◽  
Fenton Reaction ◽  
Leachate Treatment

scholarly journals The comparison of efficiency of Fenton and photo-Fenton treatment of stabilised landfill leachate / Porównanie efektywności oczyszczania odcieków z ustabilizowanego składowiska odpadów komunalnych w procesie Fentona i foto-Fentona

2015 ◽  
Vol 26 (3) ◽  
pp. 49-53 ◽  
Author(s):  
Anna Kwarciak-Kozłowska ◽  
Aleksandra Krzywicka
Keyword(s):  
Landfill Leachate ◽  
Fenton Reaction ◽  
Ferrous Sulphate ◽  
Oxygen Demand ◽  
Ammonia Nitrogen ◽  
Ammonia Removal ◽  
Mass Ratio ◽  
Leachate Treatment ◽  
Initial Ph ◽  
Removal Efficiencies

Abstract The goal of this article was to compare the efficiency of Fenton and photo-Fenton reaction used for stabilised landfill leachate treatment. The mass ratio of COD:H2O2 was fixed to 1:2 for every stages. The dose of reagents (ferrous sulphate/hydrogen peroxide) was different and ranged from 0.1 to 0.5. To determine the efficiency of treatment, the BOD (biochemical oxygen demand COD (chemical oxygen demand), TOC (total organic carbon) , ammonia nitrogen and BOD/COD ratio was measured. The experiment was carried out under the following conditions: temperature was 25ºC, the initial pH was adjusted to 3.0. Every processes were lasting 60 minutes. The most appropriate dose of reagents was 0.25 (Fe2+/H2O2). It was found that the application of UV contributed to increase of COD, TOC and ammonia removal efficiencies by an average of 14%.

Landfill leachate treatment by a photoassisted fenton reaction

1997 ◽  
Vol 35 (4) ◽  
pp. 239-248 ◽  
Author(s):  
Soo-M. Kim ◽  
Sven-U. Geissen ◽  
Alfons Vogelpohl
Keyword(s):  
Landfill Leachate ◽  
Radiation Intensity ◽  
Fenton Reaction ◽  
Energy Input ◽  
Degradation Rate ◽  
Ph Value ◽  
Uv Light ◽  
Molar Ratio ◽  
Leachate Treatment ◽  
Specific Energy Input

A combination of the classical Fenton reaction (Fe(II)+H2O2) with UV light, the photoassisted Fenton reaction, has been investigated for the treatment of landfill leachate. The investigation has been carried out with an experimental set-up to establish the optimal treatment conditions. The degradation rate of organic pollutants is strongly promoted by the photoassisted Fenton reaction. The degradation rate depends on the amount of H2O2 and Fe(II) added, pH value, and radiation intensity. At a specific energy input of 80 kW m−3 the oxidation rate was increased to six times the rate without radiation (0 kW m−3). At the higher radiation intensity of 160 kW m−3 the degradation rate was about two times faster than at that of 80 kW m−3. Due to the regeneration of the consumed Fe(II) ions through the irradiation, the amount of ferrous salt to be added can be remarkably reduced. The optimum conditions were obtained with 1.0 × 10−3 mol 1−1 Fe(II) added, a pH value of 3, and a molar ratio of COD: H2O2 = 1:1. At a COD volume loading of less than 0.6 kg m−3 h−1, a COD degradation of more than 70% could be obtained with an energy input of 80 kW m−3.

The characteristics of coagulation of fenton reaction in the removal of landfill leachate organics

1998 ◽  
Vol 38 (2) ◽  
pp. 209-214 ◽  
Author(s):  
J. Yoon ◽  
S. Cho ◽  
Y. Cho ◽  
S. Kim
Keyword(s):  
Molecular Weight ◽  
Landfill Leachate ◽  
Fenton Reaction ◽  
Treatment Process ◽  
The Other ◽  
Primary Role ◽  
Fenton Process ◽  
Leachate Treatment ◽  
Enhanced Coagulation ◽  
Organic Removal

The need to improve the Fenton process, which is one of the leachate treatment trains at Metropolitan Landfill in Korea was raised. This study was intended to compare the Fenton reaction with coagulation in removing landfill leachate organics of specific size. The organics fractionated by ultrafiltration and measured by TOC, were selected for evaluating the characteristics of the removal of organics. From this study it was found that the organic removal pattern in the Fenton reaction was quite similar to coagulation. Both reactions removed large leachate organics more readily and selectively. For example, coagulation removed 59~73% of organics larger than molecular weight (MW) of 500 and only up to 18% of organics less than MW of 500. On the other hand, the Fenton process removed 72-89% of organics larger than MW of 500 and only up to 43% of organics less than MW of 500. It was interpreted that the coagulation step in the Fenton process had a primary role in selective removal of leachate organics, though the Fenton reaction is not coagulation. However, since the efficiency of organic removal in the Fenton reaction was higher than coagulation, the Fenton process in Metropolitan Landfill leachate treatment process may be called “a type of enhanced coagulation”.

Landfill Leachate Treatment by Fenton, Photo-Fenton Processes and their Modification

2012 ◽  
Vol 15 (1) ◽  
Author(s):  
Agata Krzysztoszek ◽  
Jeremi Naumczyk
Keyword(s):  
Reaction Kinetics ◽  
Landfill Leachate ◽  
Empirical Formula ◽  
Fenton Reaction ◽  
Cod Removal ◽  
Leachate Treatment ◽  
Modified Fenton

AbstractEfficiency of leachate treatment in Fenton, photo-Fenton processes and their modifications was studied. Process was modified by leachate acidification, followed by the precipitate separation and continuing the processes. Acidification to pH 2.0 and 3.0 led to 34.3% and 18.9% COD removal respectively. The efficiency of the processes was decreasing as follows: modified photo-Fenton pH 2.0 (96.5% COD removal) > photo-Fenton pH 2.0 (95.0%) > modified photo-Fenton pH 3.0 (89.2%) > photo-Fenton pH 3.0 (85.9%) > modified Fenton pH 2.0 (79.5%) > Fenton pH 2.0 (77.6%) > modified Fenton pH 3.0 (64.8%) > Fenton pH 3.0 (63.5%). At the beginning of the processes the coagulation contribution was higher (up to 73% of total COD removal), while finally it was exceeded by Fenton reaction contribution (up to 66% of total COD removal). Empirical formula for Fenton reaction kinetics was proposed.

scholarly journals Application of Electrocoagulation with a New Steel-Swarf-Based Electrode for the Removal of Heavy Metals and Total Coliforms from Sanitary Landfill Leachate

2021 ◽  
Vol 11 (11) ◽  
pp. 5009
Author(s):  
Mayk Teles de Oliveira ◽  
Ieda Maria Sapateiro Torres ◽  
Humberto Ruggeri ◽  
Paulo Scalize ◽  
Antonio Albuquerque ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Landfill Leachate ◽  
Lower Cost ◽  
Sanitary Landfill ◽  
Leachate Treatment ◽  
Removal Of Heavy Metals ◽  
Waste Characteristics ◽  
Electrode Passivation ◽  
Steel Swarf ◽  
Sanitary Landfill Leachate

Sanitary landfill leachate (LL) composition varies according to climate variables variation, solid waste characteristics and composition, and landfill age. Leachate treatment is essentially carried out trough biological and physicochemical processes, which have showed variability in efficiency and appear a costly solution for the management authorities. Electrocoagulation (EC) seems a suitable solution for leachate treatment taking into account the characteristics of the liquor. One of the problems of EC is the electrode passivation, which affects the longevity of the process. One solution to this problem could be the replacement of the electrode by one made of recyclable material, which would make it possible to change it frequently and at a lower cost. The objective of the present work was to evaluate the removal of heavy metals (As, Ba, Cd, Cr, Cu, Fe, Pb, Mn, Ni, Se and Zn) and coliforms from a LL by EC using electrodes made from steel swarf (SfE) up to 8 h. Removal efficiencies of detected heavy metals were 51%(Cr), 59%(As), 71%(Cd), 72%(Zn), 92%(Ba), 95%(Ni) and >99%(Pb). The microbial load of coliforms in leachate was reduced from 10.76 × 104 CFU/mL (raw leachate) to less than 1 CFU/mL (after treatment with SfE) (i.e., approximately 100% reduction). The use of SfE in EC of LL is very effective in removing heavy metals and coliforms and can be used as alternative treatment solution for such effluents.

The evolving trends of landfill leachate treatment research over the past 45 years

2021 ◽  
Author(s):  
Mir Amir Mohammad Reshadi ◽  
Sajad Soleymani Hasani ◽  
Morteza Nazaripour ◽  
Gordon McKay ◽  
Alireza Bazargan
Keyword(s):  
Landfill Leachate ◽  
Leachate Treatment ◽  
The Past ◽  
Treatment Research

Landfill leachate treatment by electrocoagulation: Effects of current density and electrolysis time

2020 ◽  
Vol 8 (5) ◽  
pp. 104368
Author(s):  
Neanderson Galvão ◽  
Jeanette Beber de Souza ◽  
Carlos Magno de Sousa Vidal
Keyword(s):  
Current Density ◽  
Landfill Leachate ◽  
Electrolysis Time ◽  
Leachate Treatment
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