We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Sequential Congo Red Elimination by UASB Reactor Coupled to Electrochemical Systems.
- Authors
Romero-Soto, Itzel Celeste; García-Gómez, Celestino; Álvarez-Valencia, Luis Humberto; Meza-Escalante, Edna Rosalba; Leyva-Soto, Luis Alonso; Camacho-Ruiz, Maria Angeles; Concha-Guzmán, María Olga; Ulloa-Mercado, Ruth Gabriela; Díaz-Tenorio, Lourdes Mariana; Gortáres-Moroyoqui, Pablo
- Abstract
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.
- Subjects
CONGO red (Staining dye); UPFLOW anaerobic sludge blanket reactors; RESPONSE surfaces (Statistics); CHEMICAL oxygen demand; WASTEWATER treatment; COLOR removal in water purification
- Publication
Water (20734441), 2021, Vol 13, Issue 21, p3087
- ISSN
2073-4441
- Publication type
Article
- DOI
10.3390/w13213087