COD removal from biologically stabilized landfill leachate using Advanced Oxidation Processes (AOPs)

2018 ◽  
Vol 120 ◽  
pp. 278-285 ◽  
Author(s):  
Q. Xu ◽  
G. Siracusa ◽  
S. Di Gregorio ◽  
Q. Yuan
Keyword(s):  
Landfill Leachate ◽  
Advanced Oxidation Processes ◽  
Advanced Oxidation ◽  
Cod Removal ◽  
Oxidation Processes

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.

Identification of organic compounds in landfill leachate treated by advanced oxidation processes

2017 ◽  
Vol 40 (6) ◽  
pp. 730-741 ◽  
Author(s):  
Ana Paula Jambers Scandelai ◽  
Eliane Sloboda Rigobello ◽  
Beatriz Lopes Corso de Oliveira ◽  
Célia Regina Granhen Tavares
Keyword(s):  
Organic Compounds ◽  
Landfill Leachate ◽  
Advanced Oxidation Processes ◽  
Advanced Oxidation ◽  
Oxidation Processes

Evaluation of acute toxicity, cytotoxicity and genotoxicity of landfill leachate treated by biological lagoon and advanced oxidation processes

2017 ◽  
Vol 5 (6) ◽  
pp. 6188-6193 ◽  
Author(s):  
Cláudia Regina Klauck ◽  
Alexandre Giacobbo ◽  
Erlon Diego Lorenz de Oliveira ◽  
Luciano Basso da Silva ◽  
Marco Antônio Siqueira Rodrigues
Keyword(s):  
Acute Toxicity ◽  
Landfill Leachate ◽  
Advanced Oxidation Processes ◽  
Advanced Oxidation ◽  
Oxidation Processes

scholarly journals The removal of organic compounds from landfill leachate using ozone-based advanced oxidation processes

2018 ◽  
Vol 45 ◽  
pp. 00046
Author(s):  
Jacek Leszczyński ◽  
Jolanta Walery Maria
Keyword(s):  
Hydrogen Peroxide ◽  
Organic Compounds ◽  
Removal Efficiency ◽  
Landfill Leachate ◽  
Advanced Oxidation Processes ◽  
Advanced Oxidation ◽  
Uv Absorbance ◽  
Leachate Treatment ◽  
Oxidation Processes ◽  
Ozone Dose

In this study, the application of ozonation and ozonation with hydrogen peroxide processes for landfill leachate treatment was investigated. The effluents were characterized by COD 710 mgO2/dm3 and BOD5 72 mg O2/dm3. According to the adopted indicators, the determined BOD/COD ratio of 0.1 in raw leachates indicates a stabilized landfill. Ozone was applied at doses of 0.15 - 0.6 gO3/dm3, and hydrogen peroxide at such doses to keep the weight ratios of H2O2/O3 0.4 - 1.6. The maximum COD and UV absorbance removal was respectively 29% and 51% by applying a high ozone dose of 0.6 gO3/dm3. After oxidation, the ratio of BOD/COD was increased from 0.1 up to 0.3. It has been shown that by using hydrogen peroxide in ozonation, organic compounds expressed as COD can be efficiently removed from the effluents. The best conditions for the H2O2/O3 process were obtained with a H2O2/O3 ratio of 0.8 and ozone dose of 0.6 gO3/dm3. Under these conditions, the removal efficiency of COD was 46%.

scholarly journals Performance Analysis of Various Advanced Oxidation Processes on COD Removal from Raw Petroleum Refinery Effluent

2021 ◽  
Vol 43 (7) ◽  
pp. 504-512
Author(s):  
Sri Martini ◽  
Sharmeen Afroze ◽  
Mira Setiawati
Keyword(s):  
Advanced Oxidation Processes ◽  
Petroleum Refinery ◽  
Light Exposure ◽  
Advanced Oxidation ◽  
Operating Conditions ◽  
Cod Removal ◽  
Optimum Operating ◽  
Oxidation Processes ◽  
Refinery Effluent ◽  
Petroleum Refinery Effluent

Objectives : This comparative study investigated various methods of advanced oxidation processes (AOPs) that were separately conducted for treating raw petroleum refinery effluent regarding chemical oxygen demand (COD) removal.Methods : Fenton, photo-Fenton, TiO2, ZnO, TiO2/Ultra violet (UV), and ZnO/UV were performed individually for measuring the effect of light irradiation, treatment time, pH, catalysts dosage, and light source on the profile of COD values.Results and Discussion : The experimental data of this work showed that the dependency on the light exposure in heterogeneous photo-catalytic reaction using TiO2 and ZnO is higher than that of homogeneous photo-Fenton technique. The optimum operating conditions in heterogeneous system occurred at 100 min of oxidation time, pH 5, and catalyst dosage 1 g/L that resulted in 21.8, 20.68, 60.9, and 55.17% of COD removal for TiO2, ZnO, TiO2/UV, and ZnO/UV, respectively. In contrast, both Fenton and photo-Fenton experienced their highest performance at pH 4 by obtaining 44.2 and 59.77% of COD removal, respectively. Eventually, kinetic study indicated that COD degradation can be well expressed by second-order pattern that reached higher correlation coefficient values by 0.999 and 0.998 for TiO2/UV and TiO2, respectively.Conclusions : Overall, it could be assumed that AOPs are reliable techniques to purify raw and complex raw industrial effluents.

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