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 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%.

High ammonia landfill leachate treatment using anaerobic filter and rotating biological contactor

1995 ◽  
Vol 22 (5) ◽  
pp. 992-1000 ◽  
Author(s):  
J. Paul Henderson ◽  
James W. Atwater
Keyword(s):  
Nitrogen Removal ◽  
Landfill Leachate ◽  
Ammonia Removal ◽  
Cod Removal ◽  
Simultaneous Nitrification And Denitrification ◽  
Leachate Treatment ◽  
Rotating Biological Contactor ◽  
Loading Rates ◽  
Anaerobic Filter ◽  
High Ammonia

A pre-denitrifying anaerobic filter and a rotating biological contactor (RBC) were used to remove nitrogen from a high ammonia landfill leachate collected from a municipal and industrial solid waste landfill in Kaohsiung, Taiwan, Republic of China. The research indicated that greater than 95% ammonia removal from high ammonia-N (2140 mg/L) leachate can be achieved with RBC ammonia-N loading rates up to 1.5 g/(m2∙d). At RBC loading rates of 1.5–3.0 g/(m2∙d), ammonia removal ranged from 80% to 90%. Nitrogen removal averaged 66%, including an estimated 54% removal in the RBC. Nitrogen removal in the RBC was the result of either simultaneous nitrification and denitrification or air stripping of ammonia in combination with nitrification. Both alkalinity consumption and COD removal results support the explanation of simultaneous nitrification and denitrification (potentially aerobic denitrification); but since RBC off-gasses were not monitored, neither theory can be confirmed. The high nitrogen removal in the RBC suggests that for this leachate the anaerobic filter was not required for ammonia and nitrogen removal. BOD and COD removal averaged 92% and 49% respectively. Key words: landfill, leachate, treatment, ammonia, rotating biological contactor (RBC), nitrification, denitrification.

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.

scholarly journals Biochar compared with activated granular carbon for landfill leachate treatment

2019 ◽  
Vol 100 ◽  
pp. 00042 ◽  
Author(s):  
Anna Kwarciak-Kozłowska ◽  
Renata Włodarczyk ◽  
Katarzyna Wystalska
Keyword(s):  
Landfill Leachate ◽  
Activated Carbons ◽  
Removal Rate ◽  
Sorption Process ◽  
Cod Removal ◽  
Leachate Treatment ◽  
Similar Character ◽  
Cod Removal Rate ◽  
Static Conditions ◽  
Degree Of Sorption

The aim of the research was to compare the effectiveness of sorption of pollutants from landfill leachate on two granulated activated carbons (AG and BA-10) and biochar (BC). The sorption process of wastewater components on activated carbons was carried out under static conditions for 72 hours. The doses of adsorbents used varied from 2–8 g·dm-3. Results of removing of COD were estimated on the base of adsorption capacity and COD removal efficiency. After 72 h of the process at the highest doses (8 g·dm-3), the COD removal rate ranged from 40% (BA-10) to 60% (AG). In the case of biochar, the COD adsorption rate was 53% The state of sorption equilibrium takes a similar character for BC and AG and is determined after 4 h. The degree of sorption of selected metals from landfill leachate using the analyzed range ranged from 84% to 96% depending on its type.

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”.

Application of a modified Fenton method for landfill leachate treatment – a case study

2020 ◽  
Vol 199 ◽  
pp. 33-40
Author(s):  
Joanna Muszyńska ◽  
Jarosław Gawdzik ◽  
Łukasz Bąk ◽  
Jarosław Górski ◽  
Katarzyna Górska ◽  
...  
Keyword(s):  
Landfill Leachate ◽  
Leachate Treatment ◽  
Modified Fenton

scholarly journals Landfill Leachates Treatment by /UV, /, Modified Fenton, and Modified Photo-Fenton Methods

2012 ◽  
Vol 2012 ◽  
pp. 1-9 ◽  
Author(s):  
Jeremi Naumczyk ◽  
Izabela Prokurat ◽  
Piotr Marcinowski
Keyword(s):  
Humic Substances ◽  
Landfill Leachate ◽  
Advanced Oxidation Processes ◽  
Advanced Oxidation ◽  
Cod Removal ◽  
The Other ◽  
Fenton Process ◽  
Landfill Leachates ◽  
Oxidation Processes ◽  
Modified Fenton

Advanced oxidation processes (AOPs) such as H2O2/UV, O3/H2O2, modified Fenton, and modified photo-Fenton processes have been investigated in terms of the treatment of landfill leachate with ratio of BOD5/COD in the range of 0.22 to 0.24. The modification of Fenton and photo-Fenton processes consisted in the inclusion of precipitation and separation of humic substances at pH 3. Due to the precipitation, the value of COD decreased by 39% and BOD5by 7.1%. The modification of the processes allowed us to improve the efficiency and to decrease the doses of reagents necessary to continue the process. Modified photo-Fenton process proved to be the most effective (92.7% COD removal) of all processes investigated. Additionally, modified-Fenton process was much more effective than the other two processes when compared up to 120 min, while after longer times it gave the least satisfactory results. After 30 min of modified-Fenton process BOD5/COD ratio increased to 0.43. The parameter referred to as “efficiency of oxidants” was used to estimate the efficiency of all the processes—its value varied from 178 to 239%. Various substances including phthalates, hydrocarbons, silanes, and siloxanes were identified in raw and treated leachate.

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