Sequential Congo Red Elimination by UASB Reactor Coupled to Electrochemical Systems
Response surface methodology was investigated to determine the operational parameters on the degradation of Congo red dye (CR) and chemical oxygen demand (COD) in two electrochemical systems evaluated individually on effluent pretreated by an up-flow anaerobic sludge blanket (UASB) reactor. The UASB...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-11-01
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| Series: | Water |
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| Online Access: | https://www.mdpi.com/2073-4441/13/21/3087 |
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| author | Itzel Celeste Romero-Soto Celestino García-Gómez Luis Humberto Álvarez-Valencia Edna Rosalba Meza-Escalante Luis Alonso Leyva-Soto Maria Angeles Camacho-Ruiz María Olga Concha-Guzmán Ruth Gabriela Ulloa-Mercado Lourdes Mariana Díaz-Tenorio Pablo Gortáres-Moroyoqui |
| author_facet | Itzel Celeste Romero-Soto Celestino García-Gómez Luis Humberto Álvarez-Valencia Edna Rosalba Meza-Escalante Luis Alonso Leyva-Soto Maria Angeles Camacho-Ruiz María Olga Concha-Guzmán Ruth Gabriela Ulloa-Mercado Lourdes Mariana Díaz-Tenorio Pablo Gortáres-Moroyoqui |
| author_sort | Itzel Celeste Romero-Soto |
| collection | DOAJ |
| description | Response surface methodology was investigated to determine the operational parameters on the degradation of Congo red dye (CR) and chemical oxygen demand (COD) in two electrochemical systems evaluated individually on effluent pretreated by an up-flow anaerobic sludge blanket (UASB) reactor. The UASB reactor was fed with 100 mg L<sup>−1</sup> of CR and was operated for 12 weeks at different hydraulic residence times (HRTs) of 12 h, 10 h, and 8 h. Once stabilized at an HRT of 8 h, the effluent was collected, homogenized, and independently treated by electrooxidation (EO) and electrocoagulation (EC) cells. On both electrochemical systems, two electrode pairs were used; solid for EC (Fe and stainless-steel) and mesh electrodes for EO (Ti/PbO<sub>2</sub> and Ti), and the effect of intensity (A), recirculation flow rate (mL min<sup>−1</sup>), and experimental time (min) was optimized on response variables. The maximum efficiencies of sequential systems for COD degradation and CR decolorization were 92.78% and 98.43% by EC and ≥99.84% and ≥99.71% by EO, respectively. Results indicate that the coupled systems can be used in textile industry wastewater treatment for the removal of dyes and the decolorized by-products. |
| first_indexed | 2024-03-10T05:49:09Z |
| format | Article |
| id | doaj.art-84a22ce75bce49e2b03a71d5cf6d8224 |
| institution | Directory Open Access Journal |
| issn | 2073-4441 |
| language | English |
| last_indexed | 2024-03-10T05:49:09Z |
| publishDate | 2021-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Water |
| spelling | doaj.art-84a22ce75bce49e2b03a71d5cf6d82242023-11-22T21:55:04ZengMDPI AGWater2073-44412021-11-011321308710.3390/w13213087Sequential Congo Red Elimination by UASB Reactor Coupled to Electrochemical SystemsItzel Celeste Romero-Soto0Celestino García-Gómez1Luis Humberto Álvarez-Valencia2Edna Rosalba Meza-Escalante3Luis Alonso Leyva-Soto4Maria Angeles Camacho-Ruiz5María Olga Concha-Guzmán6Ruth Gabriela Ulloa-Mercado7Lourdes Mariana Díaz-Tenorio8Pablo Gortáres-Moroyoqui9Departamento de Biotecnología y Ciencias Alimentarias, Instituto Tecnológico de Sonora, 5 de Febrero 818 sur, Ciudad Obregón 85000, MexicoDepartamento de Biotecnología y Ciencias Alimentarias, Instituto Tecnológico de Sonora, 5 de Febrero 818 sur, Ciudad Obregón 85000, MexicoDepartamento de Ciencias Agronómica y Veterinarias, Instituto Tecnológico de Sonora, 5 de Febrero 818 sur, Ciudad Obregón 85000, MexicoDepartamento de Ciencias del Agua y Medio Ambiente, Instituto Tecnológico de Sonora, 5 de Febrero 818 sur, Ciudad Obregón 85000, MexicoDepartamento de Biotecnología y Ciencias Alimentarias, Instituto Tecnológico de Sonora, 5 de Febrero 818 sur, Ciudad Obregón 85000, MexicoCentro Universitario del Norte, Universidad de Guadalajara, Km. 191, Mexico 45D No. 23, Colotlán 46200, MexicoCentro Universitario del Norte, Universidad de Guadalajara, Km. 191, Mexico 45D No. 23, Colotlán 46200, MexicoDepartamento de Biotecnología y Ciencias Alimentarias, Instituto Tecnológico de Sonora, 5 de Febrero 818 sur, Ciudad Obregón 85000, MexicoDepartamento de Biotecnología y Ciencias Alimentarias, Instituto Tecnológico de Sonora, 5 de Febrero 818 sur, Ciudad Obregón 85000, MexicoDepartamento de Biotecnología y Ciencias Alimentarias, Instituto Tecnológico de Sonora, 5 de Febrero 818 sur, Ciudad Obregón 85000, MexicoResponse surface methodology was investigated to determine the operational parameters on the degradation of Congo red dye (CR) and chemical oxygen demand (COD) in two electrochemical systems evaluated individually on effluent pretreated by an up-flow anaerobic sludge blanket (UASB) reactor. The UASB reactor was fed with 100 mg L<sup>−1</sup> of CR and was operated for 12 weeks at different hydraulic residence times (HRTs) of 12 h, 10 h, and 8 h. Once stabilized at an HRT of 8 h, the effluent was collected, homogenized, and independently treated by electrooxidation (EO) and electrocoagulation (EC) cells. On both electrochemical systems, two electrode pairs were used; solid for EC (Fe and stainless-steel) and mesh electrodes for EO (Ti/PbO<sub>2</sub> and Ti), and the effect of intensity (A), recirculation flow rate (mL min<sup>−1</sup>), and experimental time (min) was optimized on response variables. The maximum efficiencies of sequential systems for COD degradation and CR decolorization were 92.78% and 98.43% by EC and ≥99.84% and ≥99.71% by EO, respectively. Results indicate that the coupled systems can be used in textile industry wastewater treatment for the removal of dyes and the decolorized by-products.https://www.mdpi.com/2073-4441/13/21/3087azo dyeelectrooxidationelectrocoagulationCongo redUASBwastewater |
| spellingShingle | Itzel Celeste Romero-Soto Celestino García-Gómez Luis Humberto Álvarez-Valencia Edna Rosalba Meza-Escalante Luis Alonso Leyva-Soto Maria Angeles Camacho-Ruiz María Olga Concha-Guzmán Ruth Gabriela Ulloa-Mercado Lourdes Mariana Díaz-Tenorio Pablo Gortáres-Moroyoqui Sequential Congo Red Elimination by UASB Reactor Coupled to Electrochemical Systems Water azo dye electrooxidation electrocoagulation Congo red UASB wastewater |
| title | Sequential Congo Red Elimination by UASB Reactor Coupled to Electrochemical Systems |
| title_full | Sequential Congo Red Elimination by UASB Reactor Coupled to Electrochemical Systems |
| title_fullStr | Sequential Congo Red Elimination by UASB Reactor Coupled to Electrochemical Systems |
| title_full_unstemmed | Sequential Congo Red Elimination by UASB Reactor Coupled to Electrochemical Systems |
| title_short | Sequential Congo Red Elimination by UASB Reactor Coupled to Electrochemical Systems |
| title_sort | sequential congo red elimination by uasb reactor coupled to electrochemical systems |
| topic | azo dye electrooxidation electrocoagulation Congo red UASB wastewater |
| url | https://www.mdpi.com/2073-4441/13/21/3087 |
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