Sequential Congo Red Elimination by UASB Coupled to Electrochemical Systems
| Autor: | Luis Alonso Leyva-Soto, Luis Humberto Álvarez-Valencia, Celestino García-Gómez, Ruth Gabriela Ulloa-Mercado, Edna R. Meza-Escalante, Maria Angeles Camacho-Ruiz, María Olga Concha-Guzmán, Lourdes Mariana Díaz-Tenorio, Pablo Gortáres-Moroyoqui, Itzel Celeste Romero-Soto |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
medicine.medical_treatment
Geography Planning and Development electrooxidation Aquatic Science Electrochemistry Biochemistry Electrocoagulation Congo red chemistry.chemical_compound medicine azo dye Response surface methodology TD201-500 Effluent UASB wastewater Water Science and Technology Water supply for domestic and industrial purposes Chemical oxygen demand Hydraulic engineering chemistry Wastewater electrocoagulation Sewage treatment TC1-978 Nuclear chemistry |
| Zdroj: | Water Volume 13 Issue 21 Water, Vol 13, Iss 3087, p 3087 (2021) |
| ISSN: | 2073-4441 |
| DOI: | 10.3390/w13213087 |
| Popis: | 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−1 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/PbO2 and Ti), and the effect of intensity (A), recirculation flow rate (mL min−1), 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. |
| Databáze: | OpenAIRE |
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