Electrocoagulation using a rotated anode: A novel reactor design for textile wastewater treatment

Naje, Ahmed Samir; Chelliapan, Shreeshivadasan; Zakaria, Zuriati; Abbas, Saad A.

doi:10.1016/j.jenvman.2016.03.034

Cited by 78 publications

(27 citation statements)

References 28 publications

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“…A decrease in the treatment efficiency was observed when the electrode spacing increased. It can be explained as molecule interactions with both oxidants and coagulants become weak when the electrode distance becomes >1 cm . Similar results were also obtained by Naje et al during the treatment of textile wastewater using the EC process.…”

Section: Resultssupporting

confidence: 82%

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Treatment of Dairy Industry Cleaning‐in‐Place Wastewater by Electrocoagulation Supported with Immersed Membrane Process

Ates

Özay

Dizge

2017

CLEAN Soil Air Water

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This study aims to develop an easy and economic technique for dairy cleaning‐in‐place wastewater treatment to obtain high‐quality treated wastewater effluent. A batch electrocoagulation (EC) study is conducted using iron and aluminum electrodes. The effects of various operational parameters are investigated on the treatment performance. Maximum soluble chemical oxygen demand (COD) removal efficiencies of 81% for an Fe–Fe electrode and 53% for an Al–Al electrode are obtained at an applied voltage of 10 V, an electrode spacing of 2 cm, pH of 7.2, for a reaction time of 60 min. Moreover, protein removal efficiencies of 72.6 and 79.4% are obtained for Fe–Fe and Al–Al electrodes, respectively. An immersed membrane is integrated into the EC reactor and the reactor is operated in continuous mode. COD removal efficiency is determined as 86.4 and 84.5% for Fe–Fe and Al–Al electrodes, respectively, in continuous mode. The protein removal efficiency is also calculated as 80.9 and 83.8% for Fe–Fe and Al–Al electrodes, respectively. The Fe–Fe electrode shows the maximum COD removal efficiency, whereas Al–Al provides the maximum protein removal efficiency. Additionally, field emission scanning electron microscopy (FE‐SEM) and Fourier transform IR spectroscopy (FT‐IR) are applied to describe fouling phenomena.

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Section: Resultssupporting

confidence: 82%

“…It can be explained as molecule interactions with both oxidants and coagulants become weak when the electrode distance becomes >1 cm . Similar results were also obtained by Naje et al during the treatment of textile wastewater using the EC process. The impact of electrode distance on pollutant removal was tested at 0.5, 1.0, and 1.5 cm.…”

Section: Resultssupporting

confidence: 82%

Treatment of Dairy Industry Cleaning‐in‐Place Wastewater by Electrocoagulation Supported with Immersed Membrane Process

Ates

Özay

Dizge

2017

CLEAN Soil Air Water

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“…El agua residual resultante está altamente contaminada debido a la presencia de colorantes, surfactantes, sales inorgánicas y distintos compuestos químicos empleados en el proceso productivo (Buscio et al 2015). Los valores reportados para la demanda química de oxí-geno (DQO) son de alrededor de 900 a 5000 mg/L y la demanda bioquímica de oxígeno (DBO 5 ) -con relaciones de biodegradabilidad (DBO 5 /DQO)-son inferiores a 0.15 (Cheshmeh y Safari 2016, Naje et al 2016, Yurtsever et al 2016. Por lo tanto, su descarga a cuerpos de agua, sin el tratamiento adecuado, es un riesgo para la calidad de los recursos hídricos, que son cada vez más escasos debido a la creciente población y demanda de agua (Doumic et al 2015).…”

Section: Introductionunclassified

“…Por consiguiente, se emplea generalmente como etapa de pretratamiento, de ahí que sea necesario efectuar un tratamiento posterior con el objeto de eliminar los contaminantes remanentes y satisfacer la legislación ambiental. Después del proceso de coagulación, los compuestos orgánicos remanentes en este tipo de efluentes son compuestos con estructuras aromáticas complejas y detergentes con alta solubilidad en agua, resistentes a la degradación mediante procesos bioló-gicos (Naje et al 2016). Esto implica que los métodos convencionales son insuficientes y se requiere buscar alternativas eficientes para el tratamiento de este tipo de aguas residuales.…”

Section: Introductionunclassified

Tratamiento De Aguas Residuales De La Industria Textil Mediante Coagulación Química Acoplada a Procesos Fenton Intensificados Con Ultrasonido De Baja Frecuencia

GilPavas¹,

Arbeláez-Castaño²,

Medina-Arroyave³

et al. 2018

Rev. Int. Contam. Ambie.

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Palabras clave: procesos avanzados de oxidación, sonoquímica, ultrasonido, Box-Behnken, optimización RESUMENEn la presente investigación se evaluó el tratamiento secuencial de coagulación quími-ca (CQ) seguida de los procesos avanzados de oxidación (PAO) Fenton (H2O2/Fe 2+ ) o foto-Fenton (UV/H2O2/Fe 2+ ) intensificados con radiación de ondas de ultrasonido (US) de baja frecuencia. La optimización del proceso de pretratamiento con CQ, mediante la prueba de jarras, mostró que una dosis óptima de coagulante (Al2[SO4]3) de 800 mg/L, remueve 99 % de la turbidez y 53 % de la demanda química de oxígeno (DQO). El clarificado resultante se empleó para la evaluación de los PAO. Mediante el análisis estadístico del diseño de experimentos de superficie de respuesta Box-Behnken se estableció que las condiciones óptimas de operación para el proceso US/H2O2/Fe 2+ fueron: 1 mM de Fe 2+ , 14 mM de H2O2 y pH 3. En estas condiciones de operación el proceso de CQ acoplado con el proceso US/H2O2/Fe 2+ removió alrededor de 82 % de la DQO en tanto que al acoplarlo con el proceso US/UV/H2O2/Fe 2+ alcanzó 95 % de eliminación en 90 min de reacción. El uso de ondas de ultrasonido incrementa la eficiencia del proceso alrededor de 10 %. Durante el proceso también se monitorearon la mineralización de los contaminantes y el consumo de H2O2.Key words: avanced oxidation process, sonochemistry, ultrasound, Box-Behnken, optimization

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“…12 Also, the existing work was reported that the decolorization of textile effluent by electrocoagulation (EC) method using aluminum electrodes and the color removal was obtained to be 96.5%. 13 Other than textile effluent, electrochemical coagulation method was effectively employed for the removal of color from distillery spent wash 14 , egg processing effluent 15 and pulp & paper industry bleaching effluent. 16 The decolorization efficiency is highly influenced by the type of electrodes used, suitable coagulant and processing conditions namely current density and agitation speed 17 .…”

Section: Introductionmentioning

confidence: 99%

Moringa oleifera: A COST EFFECTIVE COAGULANT FOR DYE DEGRADATION

2017

RJC

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The purpose of the work is to understand the effect of the ratio of Moringa olifera Seed powder and NaCl, current density, initial pH and agitation speed on color removal efficiency as well as COD removal from synthetic textile wastewater in the electro-coagulation technique using iron and steel electrodes. The suitable conditions for reducing color as well as COD were as follows: ratio of Moringa Olifera Seed powder and NaCl = 1: 1.5; current density = 15 mA/cm2; initial pH = 7-8; agitation speed = 400 rpm. The efficiency of color reduction and COD reduction under these conditions were found to be 60% and 55% respectively. This investigation proved that the electro-coagulation technique is a suitable method for the treatment of dye industry effluents for the purpose of reuse.

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Electrocoagulation using a rotated anode: A novel reactor design for textile wastewater treatment

Cited by 78 publications

References 28 publications

Treatment of Dairy Industry Cleaning‐in‐Place Wastewater by Electrocoagulation Supported with Immersed Membrane Process

Treatment of Dairy Industry Cleaning‐in‐Place Wastewater by Electrocoagulation Supported with Immersed Membrane Process

Tratamiento De Aguas Residuales De La Industria Textil Mediante Coagulación Química Acoplada a Procesos Fenton Intensificados Con Ultrasonido De Baja Frecuencia

Moringa oleifera: A COST EFFECTIVE COAGULANT FOR DYE DEGRADATION

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