Multiobjective Optimization of an Electroxidation Process of Biologically Pre-Treated Landifill Leachate by Response Surface Methodology and Desirability Function Approach
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G. Del Moro
Abstract
The optimization of the electrochemical step in a combined (biological and electro-oxidative) landfill leachate treatment was performed using a two stages approach, response surface methodology coupled with the desirability function. Four constraints were imposed, namely the discharge limit for COD (i.e. 160 mg / L), the maximization of color removal, the minimization of both residual chlorine and specific energy consumption. Each variable was modeled employing a second-order regression model. Analysis of variance (ANOVA) showed coefficient of determination (R2) values greater than 0.96, ensuring satisfactory fitting of the model output with the experimental data. After optimization at current density of 133 mA/cm2, stirring speed of 566 rpm and reaction time 46.2 min, the constrained COD removal percentage of 78.2% (corresponding to the aforementioned discharge limit) and a color removal maximization of 99.3% were observed. In addition, the minimization of residual chlorine and specific energy consumption reached the values of 1213 mg/L and 42.4 kWh/m3, respectively. The proposed methodology proved to be effective for saving time and experimental effort guaranteeing the achievement of optimal combination factors to reach specific target response. It is also noticeably that the overall operating treatment cost was lower than that presently found for sanitary landfill leachates. However, the high residual chlorine production leading to final effluent AOX concentration up to 35 mgCl-/L, represents an intrinsic treatment drawback.
© 2016 by Walter de Gruyter Berlin/Boston
Articles in the same Issue
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Articles in the same Issue
- Decomposition of Toluene with Plasma-catalysis: A Review
- Multiobjective Optimization of an Electroxidation Process of Biologically Pre-Treated Landifill Leachate by Response Surface Methodology and Desirability Function Approach
- Advanced Electrochemical Oxidation of Ultrafiltration Permeates from Cellulose Bleaching Effluents
- Influence of Volcanic Sand Surface Hydroxyl Groups on the Heterogeneous Catalytic Ozonation of Methylene Blue Contaminated Waters
- Sonochemical Treatment of Orange II Using Ultrasound at a Range of Frequencies and Powers
- Oxidative Dehydrogenation of Ethanol over Au/TiO2 Photocatalysts
- Heterogeneous Photo-Fenton Oxidation of Organic Pollutants on Structured Catalysts
- Degradation of Monoethanolamine by Electron Beam Irradiation: Kinetic Study and Comparison with O3 and UV AOPs
- Spatio-temporally Resolved Investigation of Surface Charges, N2(A3∑u+) Metastables and Discharge Development in Barrier Discharges
- Oxidation of Elemental Mercury with Non-Thermal Plasma Coupled with Photocatalyst
- Study on Marine Bacteria Inactivation by UV Radiation Combined with Multi-pore Ceramic Filtration
- Photocatalytic Decolorization of Methyl Orange in Bi2O3 Suspension System
- Advanced Oxidation of Reactive Blue 221 by Fenton’s Process
- The Effect of Operational Parameters on the Photocatalytic Mineralization of Indocorn Brilliant Red M5B Using Sol–gel Derived Nanostructured Zinc Titanate as an Efficient Photocatalyst
- Application of Ozonation, UV Photolysis, Fenton Treatment and other Related Processes for Degradation of Ibuprofen and Sulfamethoxazole in Different Aqueous Matrices
- Water Remediation Using Pulsed Power Discharge under Water with an Advanced Oxidation Process
- Pretreatment of Sewage Sludge by Low-frequency Ultrasound
- Semiconductor Mediated Photocatalysed Reaction of Two Selected Organic Compounds in Aqueous Suspensions of Titanium Dioxide
- Tris(hydroxymethyl)aminomethane as a Probe in Heterogeneous TiO2 Photocatalysis
- Synthesis, Characterization and Evaluation of an Adsorbent/Photocatalyst Type Alumina by Photodegradation of Methylene Blue
- The Influence of Technological Parameters on Hydrogenolysis of Glycerol in the Presence of CuCr2O4 Catalyst
- Optimization of a Ti-MWW Catalysed Phenol Hydroxylation Process
- Impacts of Changing Operational Parameters of In Situ Chemical Oxidation (ISCO) on Removal of Aged PAHs from Soil
