Scale-up modelling and life cycle assessment of electrochemical oxidation in wastewater treatment

Feijoo, Sara; Estévez, Sofía; Kamali, Mohammadreza; Dewil, Raf; Moreira, María Teresa

doi:10.1016/j.cej.2022.140627

Cited by 11 publications

(2 citation statements)

References 54 publications

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“…Fouling and degradation of electrodes necessitate regular maintenance, cleaning, or replacement, which can increase overall operational costs and reduce system efficiency. The development of electrode materials with improved resistance to fouling and degradation is an active area of research [52].…”

Section: Challenges and Limitation In Field-scale Applicationsmentioning

confidence: 99%

Exploring the Potential and Challenges of Electrochemical Processes for Sustainable Waste Water Remediation and Treatment

Ogundele,

Oyegoke,

Anaun

2023

ATG

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Emerging as an efficient, cost-effective, and environmentally sound approach, electrochemical treatment methods hold significant promise for sustainable remediation and wastewater treatment. This review elucidates recent progress in electrochemical techniques used for site decontamination and wastewater management. It elucidates the fundamental electrochemical processes, detailing the principles of electrocoagulation, electroflocculation, electrochemical membranes, electrochemical oxidation (EO), and advanced oxidation processes (AOPs). The broad applicability of these methods for contaminant removal, inclusive of heavy metals, organic pollutants, complex organic compounds, and suspended particulate matter, is underscored. Notwithstanding, the adoption of these techniques encounters notable challenges. These involve the heterogeneity of soil conditions, the presence of intricate contaminant mixtures, and the risk of electrode fouling and degradation. Suggestions for overcoming such challenges include refining the comprehension of electrochemical treatment processes in field-scale applications, investigating innovative electrode materials, and developing advanced modeling and simulation tools. This review offers a robust overview of electrochemical treatment strategies for sustainable wastewater management and can guide researchers, engineers, and policymakers towards the successful adoption and implementation of these techniques to meet environmental challenges and foster sustainable water management.

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Section: Challenges and Limitation In Field-scale Applicationsmentioning

confidence: 99%

Exploring the Potential and Challenges of Electrochemical Processes for Sustainable Waste Water Remediation and Treatment

Ogundele,

Oyegoke,

Anaun

2023

ATG

View full text Add to dashboard Cite

show abstract

“…EAOPs offer several notable advantages, including the capacity for achieving high degradation efficiencies and reaction rates under mild conditions, all while demonstrating minimal reliance on chemical additives . Moreover, their versatility, ease of process integration, and safe operation further enhance their appeal. , Notwithstanding these merits, the industrial-scale application of traditional electrochemical reactors has been impeded by their limited mass transfer efficiency . As a result, the optimization of reactor structures becomes imperative to enhance both mass transfer performance and catalytic efficiency in electrochemical reactors.…”

Section: Introductionmentioning

confidence: 99%

Numerical Analysis and Experimental Validation of the Phenomenological Behavior in a Novel Electrochemical Disc Reactor

Zhu,

Hao,

Zhou

et al. 2023

Ind. Eng. Chem. Res.

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In the present paper, a novel electrochemical disc reactor characterized by high stacking density, precise control over electrode distance, and efficient mass transfer properties was constructed via stacking up multistage disc electrodes in a tubular reactor shell. Its design parameters, such as electrode spacing and diversion hole geometry, were systematically determined through a combination of numerical simulation and experimental validation. The investigation encompassed an analysis of fluid flow distribution, mass transfer performance, and electrochemical behavior on the anode surface. The analysis of flow behavior revealed distinctive velocity distribution patterns on the upper surface of the anode, including high-velocity regions around the inlet diversion hole and jet flow zones between adjacent diversion holes. Furthermore, the inlet volumetric flow, electrode distance, and the configuration of diversion holes exerted a significant effect on the flow behavior. The residence time distribution (RTD) curves depicted precisely the flow dynamical behavior in the disc reactor. The local mass transfer coefficient (k m ) on the anode surface, estimated with numerical simulation, demonstrated strong agreement with the results tested by limiting current experiments. The potential and current density distribution on the anode surface were relatively uniform. Therefore, our findings suggest that the electrochemical disc reactor exhibited an exceptional mass transfer and electrochemical performance.

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Comparative life cycle assessment of sequential chemical and electrochemical processes for the treatment of industrial textile wastewater

Salazar-Sogamoso,

Gómez-García,

Dobrosz-Gómez

2024

J Solid State Electrochem

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Fenton-based processes, chemical and electrochemical, have attracted the interest of industrial and academic researchers for wastewater treatment. However, the deficiency of rigorous comparison between different methods, including assessment of their impact on the environment, has hindered their large-scale application. This study reports for the first time on the sustainability of raw textile wastewater treatment through two sequential processes, Coagulation-Flocculation-Fenton-Neutralization (CF-F-N) and Coagulation-Flocculation-Electro-Fenton-Neutralization (CF-EF-N), based on Life Cycle Assessment (LCA) approach. The CF-F-N and CF-EF-N were optimized at laboratory scale and compared through LCA, using the IPCC-2013 and ReCiPe-2016 midpoint and endpoint methods. The highest CO2 emissions relied on the wastewater primary treatment by CF. This due to the high amount of hazardous sludge generated and the technology necessary for its disposal (i.e., 16.89 kg CO2-Eq/FU for underground deposit in security cells or 47.52 kg CO2-Eq/FU for incineration) as well as the consumption of reagents required for the treatment (alum, 7.72 kg CO2-Eq/FU; and slaked lime, 5.56 kg CO2-Eq/FU). Regarding the sequential processes, the EF-N presented lower carbon footprint (CFP) than the F-N (14.74 kg CO2-Eq/FU vs. 20.74 kg CO2-Eq/FU). Electricity (87.02% of the total CFP) and reagents (88.63% of the total CFP) denoted the main environmental hotspot during the EF-N and F-N, respectively. The EF-N, compared to the F-N, had an inferior incidence in 14 of the 18 impact categories analyzed using the ReCiPe-2016 method at the midpoint level. This is the result of low consumption of reagents and auxiliary chemicals. The electricity was also found as main environmental hotspot of the EF-N. The ReCiPe-2016 method at the endpoint level showed that the EF-N resulted in lower environmental load in all impact categories. The economic performance (11.91 USD/m3 for CF-EF-N vs. 13.66 USD/m3 for CF-F-N) and LCA demonstrated the competitiveness of the electrochemical sequential process compared to the chemical one. The CF-EF-N can be considered more environmentally sustainable technology.

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Scale-up modelling and life cycle assessment of electrochemical oxidation in wastewater treatment

Cited by 11 publications

References 54 publications

Exploring the Potential and Challenges of Electrochemical Processes for Sustainable Waste Water Remediation and Treatment

Exploring the Potential and Challenges of Electrochemical Processes for Sustainable Waste Water Remediation and Treatment

Numerical Analysis and Experimental Validation of the Phenomenological Behavior in a Novel Electrochemical Disc Reactor

Comparative life cycle assessment of sequential chemical and electrochemical processes for the treatment of industrial textile wastewater

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