Electrocoagulation process for the decolorization of wastewater containing Reactive Red 195 and CFD simulation of the hydrodynamic in a continuous-flow single-channel reactor
The highly colored textile effluents require efficient treatment before being released into the environment. In this study, a continuous-flow single-channel reactor operating in closed- circuit was used to apply electrocoagulation for the treatment of synthetic textile wastewater. First, the charact...
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| Format: | Article |
| Language: | English |
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IWA Publishing
2023-05-01
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| Series: | Water Practice and Technology |
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| Online Access: | http://wpt.iwaponline.com/content/18/5/1099 |
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| author | Raowia Lamhar Toussaint Ntambwe Kambuyi Zakia Zmirli Anas Aguelmous Bouchra Bejjany Khalid Digua Adil Dani |
| author_facet | Raowia Lamhar Toussaint Ntambwe Kambuyi Zakia Zmirli Anas Aguelmous Bouchra Bejjany Khalid Digua Adil Dani |
| author_sort | Raowia Lamhar |
| collection | DOAJ |
| description | The highly colored textile effluents require efficient treatment before being released into the environment. In this study, a continuous-flow single-channel reactor operating in closed- circuit was used to apply electrocoagulation for the treatment of synthetic textile wastewater. First, the characterization of the hydrodynamic within the reactor is evaluated by Computational Fluid Dynamics simulation using the k-ε turbulence model (Comsol Multiphysics®). Apart from a non-uniform distribution of the velocities inside the reactor, no particular anomaly was observed. Second, the decolorization efficiency was examined under various current intensities, electrolysis times, and initial dye concentrations. By operating under a current intensity of 100 mA instead of 50 mA, the required electrolysis time to achieve a decolorization efficiency of 80% decreased by 40%, while the specific electrode consumption remained slightly unchanged at about 0.19 kg Al·kg−1. At a current intensity of 100 mA and an electrolysis time of 26 min, and the increase in the initial dye concentration from 10 to 50 mg·L−1 the decolorization efficiency decreased remarkably while the specific electrode consumption was kept constant at about 0.15 kg Al·kg−1 dye removed. The knowledge obtained through this study can be used for the transposition from batch to continuous mode.
HIGHLIGHTS
The EC process was carried out in a recirculation mode.;
Comsol Multiphysics was used to perform CFD simulation in order to investigate the transport phenomenon in the CFSC reactor.;
The RTD study is used to validate the numerical results obtained by CFD simulation.;
The current intensities applied are far lower than in a conventional EC cell.;
0.15 kg/kg was considered to be the limit value of the specific electrode consumption.; |
| first_indexed | 2024-03-13T07:04:53Z |
| format | Article |
| id | doaj.art-dd986c172ccc4c92864f67f4e3de67a2 |
| institution | Directory Open Access Journal |
| issn | 1751-231X |
| language | English |
| last_indexed | 2024-03-13T07:04:53Z |
| publishDate | 2023-05-01 |
| publisher | IWA Publishing |
| record_format | Article |
| series | Water Practice and Technology |
| spelling | doaj.art-dd986c172ccc4c92864f67f4e3de67a22023-06-06T13:53:03ZengIWA PublishingWater Practice and Technology1751-231X2023-05-011851099111410.2166/wpt.2023.069069Electrocoagulation process for the decolorization of wastewater containing Reactive Red 195 and CFD simulation of the hydrodynamic in a continuous-flow single-channel reactorRaowia Lamhar0Toussaint Ntambwe Kambuyi1Zakia Zmirli2Anas Aguelmous3Bouchra Bejjany4Khalid Digua5Adil Dani6 Laboratory of Process and Environmental Engineering, Faculty of Sciences and Technics of Mohammedia, Hassan II University of Casablanca, Mohammedia, Morocco Laboratory of Chemical Engineering, UMR CNRS 5503, Campus University of Toulouse III-Paul Sabatier, FSI. 118, Narbonne road, Toulouse 31062, France Laboratory of Advanced Materials and Process Engineering, Faculty of Sciences, Ibn Tofail University, Kenitra, Morocco Laboratory of Advanced Materials and Process Engineering, Faculty of Sciences, Ibn Tofail University, Kenitra, Morocco Laboratory of Process and Environmental Engineering, Faculty of Sciences and Technics of Mohammedia, Hassan II University of Casablanca, Mohammedia, Morocco Laboratory of Process and Environmental Engineering, Faculty of Sciences and Technics of Mohammedia, Hassan II University of Casablanca, Mohammedia, Morocco Laboratory of Process and Environmental Engineering, Faculty of Sciences and Technics of Mohammedia, Hassan II University of Casablanca, Mohammedia, Morocco The highly colored textile effluents require efficient treatment before being released into the environment. In this study, a continuous-flow single-channel reactor operating in closed- circuit was used to apply electrocoagulation for the treatment of synthetic textile wastewater. First, the characterization of the hydrodynamic within the reactor is evaluated by Computational Fluid Dynamics simulation using the k-ε turbulence model (Comsol Multiphysics®). Apart from a non-uniform distribution of the velocities inside the reactor, no particular anomaly was observed. Second, the decolorization efficiency was examined under various current intensities, electrolysis times, and initial dye concentrations. By operating under a current intensity of 100 mA instead of 50 mA, the required electrolysis time to achieve a decolorization efficiency of 80% decreased by 40%, while the specific electrode consumption remained slightly unchanged at about 0.19 kg Al·kg−1. At a current intensity of 100 mA and an electrolysis time of 26 min, and the increase in the initial dye concentration from 10 to 50 mg·L−1 the decolorization efficiency decreased remarkably while the specific electrode consumption was kept constant at about 0.15 kg Al·kg−1 dye removed. The knowledge obtained through this study can be used for the transposition from batch to continuous mode. HIGHLIGHTS The EC process was carried out in a recirculation mode.; Comsol Multiphysics was used to perform CFD simulation in order to investigate the transport phenomenon in the CFSC reactor.; The RTD study is used to validate the numerical results obtained by CFD simulation.; The current intensities applied are far lower than in a conventional EC cell.; 0.15 kg/kg was considered to be the limit value of the specific electrode consumption.;http://wpt.iwaponline.com/content/18/5/1099cfd simulationcfsc reactordecolorizationelectrocoagulationrr195textile wastewater |
| spellingShingle | Raowia Lamhar Toussaint Ntambwe Kambuyi Zakia Zmirli Anas Aguelmous Bouchra Bejjany Khalid Digua Adil Dani Electrocoagulation process for the decolorization of wastewater containing Reactive Red 195 and CFD simulation of the hydrodynamic in a continuous-flow single-channel reactor Water Practice and Technology cfd simulation cfsc reactor decolorization electrocoagulation rr195 textile wastewater |
| title | Electrocoagulation process for the decolorization of wastewater containing Reactive Red 195 and CFD simulation of the hydrodynamic in a continuous-flow single-channel reactor |
| title_full | Electrocoagulation process for the decolorization of wastewater containing Reactive Red 195 and CFD simulation of the hydrodynamic in a continuous-flow single-channel reactor |
| title_fullStr | Electrocoagulation process for the decolorization of wastewater containing Reactive Red 195 and CFD simulation of the hydrodynamic in a continuous-flow single-channel reactor |
| title_full_unstemmed | Electrocoagulation process for the decolorization of wastewater containing Reactive Red 195 and CFD simulation of the hydrodynamic in a continuous-flow single-channel reactor |
| title_short | Electrocoagulation process for the decolorization of wastewater containing Reactive Red 195 and CFD simulation of the hydrodynamic in a continuous-flow single-channel reactor |
| title_sort | electrocoagulation process for the decolorization of wastewater containing reactive red 195 and cfd simulation of the hydrodynamic in a continuous flow single channel reactor |
| topic | cfd simulation cfsc reactor decolorization electrocoagulation rr195 textile wastewater |
| url | http://wpt.iwaponline.com/content/18/5/1099 |
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