Improvement of anaerobic digestion of landfill leachate by using coagulation-flocculation, Fenton's oxidation and air stripping pretreatments

2017 ◽  
Vol 37 (3) ◽  
pp. 1041-1049 ◽  
Author(s):  
Yosr Smaoui ◽  
Najwa Mlaik ◽  
Jalel Bouzid ◽  
Sami Sayadi
Keyword(s):  
Anaerobic Digestion ◽  
Landfill Leachate ◽  
Air Stripping ◽  
Fenton’S Oxidation ◽  
Fenton's Oxidation

scholarly journals Pre-treatment of industrial landfill leachate by Fenton’s oxidation

2013 ◽  
Vol 9 (1) ◽  
pp. 51-56
Keyword(s):  
Reaction Time ◽  
Landfill Leachate ◽  
Oxidation Reaction ◽  
Organic Load ◽  
Solution Ph ◽  
Reaction Solution ◽  
Fenton’S Oxidation ◽  
Initial Ph ◽  
Pre Treatment ◽  
Fenton's Oxidation

Biological treatment (aerobic and anaerobic) of industrial landfill leachate is limited by the presence of toxic contaminants (e.g., heavy metals) and recalcitrant (biopersistent) organics (e.g., polyphenols, pharmaceuticals, cosmetics, etc.,), hindering viable conditions for biomass proliferation in biological reactors, with difficulties in meeting concentration limits imposed by applied regulations. Fenton’s oxidation by the use of Fe2+-H2O2-H+ mixture may be used as a pre-treatment of industrial landfill leachate for preliminary abatement of the organic load and to improve biodegradability (BOD/COD>0.4) to favour biological oxidation in conventional wastewater treatment plants. Leachate from Grottaglie (S.E. Italy) non-hazardous landfill (pH 8.6; COD=11.000 mg l-1; BOD5=2.400 mg l-1; NH4-N=2.900 mg l-1; conductivity=60.000 μS cm-1) was laboratory tested in different operative conditions, i.e., initial pH, Fe2+/H2O2 ratio, concentrations and reaction time. The oxidation reaction was monitored by equilibrium pH and residual COD and BOD5 concentrations. Best operative conditions were obtained at pH 3, Fe2+=700 mg l-1, H2O2=9,900 mg l-1 (H2O2/Fe2+ratio~13w/w), reaction time=2h. Following the oxidation reaction, solution pH was neutralized by the addition of Ca(OH)2 or NaOH (120 meq l-1) for further abatement of target parameters by precipitation/sorption. Preliminary technical/economical evaluation of possible process schemes is also given in the paper.

Formation of disinfection byproducts during Fenton’s oxidation of chloride-rich landfill leachate

2020 ◽  
Vol 382 ◽  
pp. 121213 ◽  
Author(s):  
Syeed Md Iskander ◽  
Teng Zeng ◽  
Elizabeth Smiley ◽  
Stephanie C. Bolyard ◽  
John T. Novak ◽  
...  
Keyword(s):  
Landfill Leachate ◽  
Disinfection Byproducts ◽  
Fenton’S Oxidation ◽  
Fenton's Oxidation

Application of Response Surface Methodology for Optimization of Treatment for an Aged Landfill Leachate Using Fenton's Oxidation Reagent

2017 ◽  
Vol 34 (10) ◽  
pp. 731-739 ◽  
Author(s):  
Ramalingam Subramaniam ◽  
Daniel D. Gang ◽  
Jing Nie ◽  
Rakesh Bajpai ◽  
Stephen Dufreche ◽  
...  
Keyword(s):  
Response Surface Methodology ◽  
Response Surface ◽  
Landfill Leachate ◽  
Fenton’S Oxidation ◽  
Fenton's Oxidation

Integrated Strategy for Treatment of Winery Wastewaters Using Flocculation, Ozonation and Fenton’s Oxidation

2009 ◽  
Vol 12 (2) ◽  
Author(s):  
Rui C. Martins ◽  
Fernando J.R. Abegão ◽  
Adrián M.T. Silva ◽  
Rosa M. Quinta-Ferreira
Keyword(s):  
Suspended Solids ◽  
Oxygen Demand ◽  
Operational Cost ◽  
Adequate Treatment ◽  
Integration Strategy ◽  
Fenton’S Oxidation ◽  
Optimal Efficiency ◽  
Fenton's Oxidation ◽  
Ozonation Process

AbstractThe present research is based on a case-study involving the development of an adequate treatment for agro-effluents originating from wineries. Flocculation, Fenton’s oxidation and ozonation processes were investigated in order to define the best integration strategy that may conduce to optimal efficiency of degradation and operational cost. Chemical oxygen demand (COD), total suspended solids (TSS), and total organic carbon (TOC) were some of the parameters used to analyze the performance of these technologies. The higher COD and TSS removals (73% and 94% respectively) were achieved combining the ozonation treatment with the Fenton process. In addition, the respective cost of COD reduction is lower in this case, when compared with other alternatives. Flocculation revealed not to be needed since in the ozonation process the suspended solids are able to be degraded.

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