Sequential Congo Red Elimination by UASB Reactor Coupled to Electrochemical Systems

Romero-Soto, Itzel; García-Gómez, Celestino; Álvarez, Luis H.; Meza-Escalante, Edna R.; Leyva-Soto, Luis Alonso; Camacho-Ruiz, Maria Angeles; Concha-Guzman, María; Ulloa-Mercado, Ruth Gabriela; Díaz-Tenorio, Lourdes Mariana; Gortáres‐Moroyoqui, Pablo

doi:10.3390/w13213087

Cited by 2 publications

(2 citation statements)

References 51 publications

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“…On the other hand, amine byproducts have substituents with nitro and sulfonic groups, hampering their mineralization in an aerobic environment. Romero-Soto et al [51] investigated sequential UASB and electrochemical (EC) systems for Cong Red (CR) removal. COD and CR removals were >92% and >98% using UASB + electrocoagulation and >99% and >99% when UASB + electro-oxidation was employed.…”

Section: Uasb Reactor's Performance In Treating Dye-containing Effluentsmentioning

confidence: 99%

A Short Review on Dye-Wastewater Valorization Using Up-Flow Anaerobic Sludge Blanket Reactors

de Almeida,

de Souza Guimarães

2023

Waste

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Dye-containing effluent generated in textile industries is polluting and complex wastewater. It should be managed adequately before its final destination. The up-flow anaerobic blanket (UASB) reactor application is an ecofriendly and cost-competitive treatment. The present study briefly reviews the UASB application for dye-containing wastewater valorization. Bioenergy and clean-water production potential during dye-containing wastewater treatment are emphasized to promote resource recovery in textile industries. Hydraulic retention time (HRT), organic loading rate (OLR), pH, temperature, and hydraulic mixing influence sludge granulation, microbial activity, and dye removal. HRT and OLR ranges of 6–24 h and 1–12 kg m−3 d−1 of chemical oxygen demand (COD) at a mesophilic temperature (30–40 °C) are recommended for efficient treatment. In these conditions, efficiencies of color and COD of 50–97% and 60–90% are reported in bench-scale UASB studies. Complex dye structures can hinder biomineralization. Pretreatment may be necessary to reduce dye concentration. Carbon-source and redox mediators are added to the UASB reactor to expedite kinetic reactions. A biogas yield of 1.48–2.70 L d−1 in UASB, which treats dye-containing effluents, is documented. Cotreatment of dye wastewater and locally available substrate could increase biogas productivity in UASB reactors. Organic waste generated in the textile industry, such as dye sludge, cotton, and starch, is recommended to make cotreatment cost competitive. Bioenergy production and water reuse allow environmental and economic benefits. Studies on combined systems integrating UASB and membrane processes, such as ultrafiltration and nanofiltration, for the production of reusable water and pretreatment of wastewater and sludge for improvements in biogas production might realize the complete potential for resource recovery of UASB technology. UASB bioenergy usage for integrated treatment trains can reduce operating costs and assist process sustainability in the textile industry.

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Section: Uasb Reactor's Performance In Treating Dye-containing Effluentsmentioning

confidence: 99%

A Short Review on Dye-Wastewater Valorization Using Up-Flow Anaerobic Sludge Blanket Reactors

de Almeida,

de Souza Guimarães

2023

Waste

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“…Due to cost competitivity, the anaerobic technology has maintained attention from scientists and engineers, which can degrade refractory macromolecular organic pollutants, such as colorant anthraquinone and azo dyes, into small molecular ones, so as to improve the biodegradability of wastewater [3]. Among a few types of anaerobic reactors, such as expanded granular sludge bed (EGSB) reactor [4], up-flow anaerobic sludge blanket (UASB) reactor [5], anaerobic membrane bioreactor (AnMBR) [6], recirculating fixed-bed bioreactor (RFBB) [7] and strengthened circulation anaerobic (SCA) reactor [8], anaerobic baffled reactor (ABR) has been widely investigated [9].…”

Section: Introductionmentioning

confidence: 99%

Pilot-Scale Anaerobic Treatment of Printing and Dyeing Wastewater and Performance Prediction Based on Support Vector Regression

Wang

Chen

et al. 2022

Fermentation

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Printing and dyeing wastewater is characterized with complex water quality and poor biodegradability. In this study, a pilot-scale anaerobic baffled reactor (ABR) with packing was verified to effectively degrade the complex organic pollutants in the wastewater through the hydrolysis and acidification of anaerobic microorganisms. At a hydraulic retention time (HRT) of 12 h and an organic loading rate (OLR) of 2.0–2.5 kg COD/(m3·d), the ABR stabilized the fluctuation range of pH and achieved an average colority removal rate of 10.5%, which provided favorable conditions for subsequent aerobic treatment. During the early operation period, the reactor increased the alkalinity of the wastewater; after 97 days of operation, the volatile fatty acid (VFA) content in the wastewater decreased. To demonstrate the suitability of the support vector regression (SVR) technology in predicting the performance of the reactor, two SVR algorithms with three kernel functions were employed to relate the chemical oxygen demand (COD) removal rate to its influencing factors, and the predictions of both the training and validation groups agreed with the measurements. The results obtained from this study can contribute to the design and optimal operation of the anaerobic treatment project of the industrial wastewater treatment plant.

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Sequential Congo Red Elimination by UASB Reactor Coupled to Electrochemical Systems

Cited by 2 publications

References 51 publications

A Short Review on Dye-Wastewater Valorization Using Up-Flow Anaerobic Sludge Blanket Reactors

A Short Review on Dye-Wastewater Valorization Using Up-Flow Anaerobic Sludge Blanket Reactors

Pilot-Scale Anaerobic Treatment of Printing and Dyeing Wastewater and Performance Prediction Based on Support Vector Regression

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