CFD simulation of biphasic flow, mass transport and current distribution in a continuous rotating cylinder electrode reactor for electrocoagulation process

Villalobos-Lara, A. Daniel; Pérez, Tzayam; Uribe, Agustín R.; Alfaro-Ayala, J. Arturo; Ramírez-Minguela, J.J.; Minchaca-Mojica, Jesús I.

doi:10.1016/j.jelechem.2019.113807

Cited by 31 publications

(8 citation statements)

References 27 publications

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“…2(c)), discoids, 16,26,27 ball shaped anodes, 28 mesh wire (Fig. 2(e)), plates positioned at angles, 29 etc. Noticeable efforts have been made by some researchers to collaborate with industries in order to produce advanced designs for their study.…”

Section: Initial Influent Concentrationmentioning

confidence: 99%

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Electrocoagulation as a revived wastewater treatment method‐practical approaches: a review

Magnisali

Yan

Vayenas

2021

J of Chemical Tech & Biotech

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This review paper aims to demonstrate electrocoagulation (EC) as a revived technology and introduce recent steps of advanced configurations, along with hybrid approaches for the efficient electrochemical treatment of multi-sourced wastewaters. A brief theoretical background is also provided. Moreover, the practical applications of the process are presented, while no previous research has ever attempted to do so. Through online-based data research, it was found that there are 75 manufacturers of EC systems internationally. Industrial case studies reveal actual process conditions and economical data. America holds 33% of global EC systems' manufacturing share and it is considered the leader in EC innovative designs with a percentage of almost 59%. In America and Europe, composite schemes are nearly equivalent to EC autonomous systems, with respective percentages of 41% and 47%. The performance of a two-stage process combining electro-coagulation (EC) and electro-oxidation (EO) has been proven to be the most successful combination in industrial wastewater treatment, representing 54% of hybrid systems available globally. Most of the commercialized EC systems are of small-medium sizes, accounting for 88% of all systems available worldwide. The latest trends on new reactor and electrode configurations are also presented. EC has great potential for further improvement as there is strong academic background to support water treatment companies for industrial scale ups. Cylindrical type reactors tend to dominate due to the ease of their use and maintenance; meanwhile, hybrid systems of EC with EO, membranes and/or adsorption will continue to expand on the market due to the mature level of these technologies and their ease of adaptation.

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Section: Initial Influent Concentrationmentioning

confidence: 99%

“…3(a)), 12 hopper bottom cells (Fig. 3(b)), 24 cuboid type cells, 25 rotating cylinder cells, 29 and others. The abovementioned cell designs are usually combined with advanced electrode designs.…”

Section: Temperaturementioning

confidence: 99%

Electrocoagulation as a revived wastewater treatment method‐practical approaches: a review

Magnisali

Yan

Vayenas

2021

J of Chemical Tech & Biotech

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“…Besides the acquisition of numerical data, the visual representation of a wide variety of parameters facilitates the understanding of the system. In the last decade, different research groups have made use of this type of software to improve and understand systems such as AO, EC and EF, for example, Figure 3a shows the mixing comparison of a vertical-flow tubular and a concentric tubular electrochemical reactors, as can be seen the turbulent intensity of wastewater was higher around the electrodes in the former reactor, which translates as a better mass transfer of the active substances towards the electrodes surface (Wang et al, 2015), Figure 3b illustrates the current distribution in the electrodes of an EC reactor (Villalobos-Lara et al, 2020) and Figure 3c shows the generation of Fe 2+ that takes place in the cathode due to the reduction of Fe 3+ after different time intervals during the EF process (Reza et al, 2015).…”

Section: Computational Fluid Dynamics In Electrochemical Reactorsmentioning

confidence: 99%

“…Compilation of representative publications on stand-alone electrochemical processes applied to the treatment of highly polluted wastewater. [Adapted with permission from: (Wang, Li et al 2015) (Villalobos-Lara et al, 2020 and (Reza, Masoud et al 2015)]. Copyright Elsevier.…”

Section: Declaration Of Interest Statementmentioning

confidence: 99%

“…Figure 3. CFD simulation for a) the turbulent intensity distribution in a vertical-flow tubular electrochemical reactor (I) and a concentric tubular electrochemical reactor (II) for AO of phenol wastewater, b) normalized current density distribution in a rotating cylinder electrode (RCE) reactor for EC, I) RCE surface and II) working electrode plates and c) concentration profile of Fe 2+ around the cathode during EF process at (I) t = 0 s and (II) t = 400 s.[Adapted with permission from:(Wang, Li et al 2015) (Villalobos-Lara et al, 2020 and(Reza, Masoud et al 2015)]. Copyright Elsevier.…”

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Electrochemical treatment of highly concentrated wastewater: A review of experimental and modeling approaches from lab- to full-scale

García-Rodríguez

Mousset

Olvera‐Vargas

et al. 2020

Critical Reviews in Environmental Science and Technology

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This review proposes an insight into the prospects of electrochemistry for the treatment of highly concentrated effluents in three sections. The first section focuses on the challenges inherent to such kind of wastewater, divided into five categories: industrial wastewater (e.g., pharmaceutical, electronics, chemical, food-processing), hypersaline effluents (e.g., RO concentrates), solutions contaminated with a mixture of organic and inorganic contaminants (e.g., leachate, mining), highly viscous solution (or non-Newtonian liquid) (e.g., sludge) and solutions of high COD load but with low pollutant content (e.g., from soil washing). The second section of this review then focuses on the treatment strategies to ensure that the electrochemical treatment is adapted to these very specific waste streams, including the influence of operating conditions, electrode materials and processes (with special emphasis on anodic oxidation, electro-Fenton and electrocoagulation). The final part focuses on the perspectives of electrochemical treatment of challenging wastewater, by giving the engineering parameters to ensure successful upscaling of electrochemical processes in terms of modeling mass transport, charge transfer and hydrodynamics, reactor designs and energy requirements. The review concludes on process combinations, where electrochemistry could complement traditional methods of treatment, in order to improve the overall efficiency of the integrated system.

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Experimental analysis of a rotating cylinder electrode reactor: Hydrodynamics and mass transport

Vazquez,

Cadena,

Frontana

et al. 2024

J Adv Manuf & Process

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This report deals with the hydrodynamic and mass transport characterization in an rotating cylinder electrode (RCE) in continuous and batch configuration employing relatively simple techniques like obtaining the mixing time, polarization, and residence time distribution (RTD) curves. For batch configuration, the limiting current and Sh values were higher than for continuous configuration, indicating that the mixing pattern is influenced by possible flow inhomogeneities during the operation as a continuous mixing stirrer. This could diminish the amount of electroactive reactant that reaches the electrode surface, due to the possible shrinking of recirculation zones during the rotation of the cylindrical stirrer, forming channeling and by‐pass flow zones. These results could evidence the existence of slight deviations from the ideal mixer and other non‐ideality flow zones associated with the width of curves upon analyzing age function through RTD curves, at the different flow rates employed in continuous configurations.

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CFD simulation of biphasic flow, mass transport and current distribution in a continuous rotating cylinder electrode reactor for electrocoagulation process

Cited by 31 publications

References 27 publications

Electrocoagulation as a revived wastewater treatment method‐practical approaches: a review

Electrocoagulation as a revived wastewater treatment method‐practical approaches: a review

Electrochemical treatment of highly concentrated wastewater: A review of experimental and modeling approaches from lab- to full-scale

Experimental analysis of a rotating cylinder electrode reactor: Hydrodynamics and mass transport

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