Treatment of the textile wastewater by electrocoagulation

Bayramoǧlu, Mahmut; Eyvaz, Murat; Kobya, Mehmet

doi:10.1016/j.cej.2006.10.008

Cited by 270 publications

(123 citation statements)

References 11 publications

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“…EC process is a recently developed technique which is being employed in the treatment of various wastewaters (Kim et al 2002;Aoudj et al 2010;Serge et al 2010;Kamaraj et al 2013;Maleki et al 2014;Ndjomgoue-Yossa et al 2014). It is a simple, efficient, safe, flexible and cost-effective treatment process (Bayramoglu et al 2004(Bayramoglu et al , 2007Guven et al 2009). Less sludge generation, less chemicals requirement, little space requirement, shorter residence time and colorless treated effluent production are some advantages of this process (Ahlawat et al 2008).…”

Section: Introductionmentioning

confidence: 99%

Electrochemical treatment of actual sugar industry wastewater using aluminum electrode

Sahu

Gupta

Chaudhari

et al. 2015

Int. J. Environ. Sci. Technol.

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In the present study, electrochemical (EC) treatment of sugar industry wastewater (SIWW) was investigated using aluminum electrode. Effect of various parameters such as pH, current density (CD), electrode gap and electrolysis time was evaluated for chemical oxygen demand (COD) and color reduction. Energy requirement and electrode loss were found to increase with an increase in pH. Kinetics studies showed that the COD reduction rate was second order with respect to organic materials (COD) and 0.591 order with respect to CD. Filtration of treated slurry was found to be best near the neutral pH, while settling was best at pH 10. Operating cost of the treatment has been calculated. Results demonstrate that EC can be applied to reduce pollution load of SIWW.

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Section: Introductionmentioning

confidence: 99%

Electrochemical treatment of actual sugar industry wastewater using aluminum electrode

Sahu

Gupta

Chaudhari

et al. 2015

Int. J. Environ. Sci. Technol.

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“…De manière générale, l'action des processus électrochimiques sur la matière organique conduit essentiellement à son oxydation directe à la surface de l'anode et/ou à son oxydation indirecte par des oxydants en solution (LABANOWSKI, 2004). En conclusion, la densité de courant est jugée comme un paramètre essentiel en électrocoagulation, spécifiquement pour la cinétique d'abattement de DCO et la coloration (BAYRAMOGLU et al, 2007;MOLLAH et al, 2001). …”

Section: Effet De La Tension éLectrique Sur La Dco Et La Décolorationunclassified

Traitement des effluents d’abattoir de viande rouge par électrocoagulation-flottation avec des électrodes en fer

Khennoussi

Chaouch

Chahlaoui

2013

rseau

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L’effluent de l’abattoir municipal de la ville de Meknès est caractérisé par une forte charge organique polluante et une coloration rouge due à la concentration élevée en sang. Les analyses physicochimiques et microbiologiques ont révélé des concentrations importantes en paramètres globaux de pollution, et une charge microbiologique marquée par la dominance des coliformes. La demande chimique en oxygène (DCO) moyenne est de 2 240 mg d’O2•L‑1. La concentration moyenne en azote total est de 290 mg•L‑1. Les orthophosphates sont à une concentration moyenne de 35 mg•L‑1. La matière extractible à l’hexane (MEH) varie entre 900 et 1 100 mg•L‑1. Les coliformes fécaux sont de 67•103 UFC•mL‑1.Le traitement par électrocoagulation-flottation utilisant des électrodes plates de fer, avec une tension électrique de 12 V et un temps de contact de 25 min, a donné de bons résultats. Il a permis l’abattement de 92,6 % de DCO, 76,2 % d’azote total, et 95,4 % des orthophosphates. Les MEH sont éliminées à 62,5 % grâce au phénomène de flottation favorisé par le dégagement des bulles d’hydrogène issues de la réduction de l’eau à la cathode, et le brassage de l’effluent par agitation dans la cellule électrolytique. Ce processus a permis également la décoloration de cet effluent, illustrée par une diminution de l'absorption à 450 nm supérieure à 90 %, et une diminution remarquable de l'absorbance UV à 254 nm, traduisant l’élimination de matière organique dissoute par des mécanismes d'oxydation électrochimiques. Les coliformes fécaux sont réduits de trois unités logarithmiques.The effluent of the municipal slaughterhouse in Meknes City, Morocco, is characterized by a high organic pollution load and red colour due to the high concentration of blood. Physicochemical and microbiological analyzes revealed significant levels of pollution and microbiological load marked by the dominance of coliform bacteria. The average chemical oxygen demand (COD) is 2,240 mg O2•L‑1. The average concentration of total nitrogen is 290 mg•L‑1 and that for orthophosphates is 35 mg•L‑1. Fat and grease content varies between 900 and 1,100 mg•L‑1. The number of fecal coliforms is 67•103 UFC•mL‑1. Treatment by electrocoagulation-flotation using iron plate electrodes, with a voltage of 12 V and a contact time of 25 min, gave good results. It can achieve reductions in chemical oxygen demand (COD) of 92.6%. Total nitrogen removal was 76.2%, and the reduction of orthophosphate was 95.4%. Fat and grease can be reduced by 62.5% thanks to the flotation step, favoured by the release of hydrogen bubbles from the reduction of water at the cathode and the mixing of the effluent by stirring in the electrolytic cell. This process also enabled the reduction of the red colour, as illustrated by the decrease in absorbance at 450 nm, a reduction exceeding 90%, and a remarkable decrease in UV absorbance at 254 nm, reflecting the removal of dissolved organic material by electrochemical oxidation mechanisms. Fecal coliforms are reduced by three logarithmic units

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“…The effluent is recovered without flock since the later is formed by electroflotation in the separator section and recovered by overflow (6) or by a scraping system (14).…”

Section: Reactor Designmentioning

confidence: 99%

“…Many papers demonstrated that the electrocoagulation (EC) technique could be an effective tool for treatment of textile wastewaters leading to high removal efficiency with relatively low cost [6]. EC consists of creating metallic hydroxides flocks within the wastewater by electrodissolution of soluble anodes namely the iron or aluminum.…”

Section: Introductionmentioning

confidence: 99%

Removal of Real Textile Dyes by Electrocoagulation/Electroflotation in a Pilot External-Loop Airlift Reactor

Chenik¹,

Elhafdi²,

Dassaa³

et al. 2013

JWARP

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This paper studied the efficiency of electrocoagulation/electroflotation in removing colour from real textile wastewater by using aluminum and iron electrodes in an innovative pilot external-loop airlift reactor of 150 L. The reactor was designed to operate in batch and continuous modes. The real effluent contained 90% of disperse dye and 10% of reactive dye. A complete flotation of pollutants with acceptable mixing was achieved in this reactor using only the overall liquid recirculation induced by H 2 microbubbles. The treatment of these discharges was easier using electrodes of iron rather than aluminum. The optimal initial pH was 10 for both aluminum and iron electrodes. By using iron electrodes, the maximum decolourisation efficiency and COD reduction efficiency reached respectively 96% and 65% for 90 minutes of treatment. Similarly, by using aluminum electrodes, the maximum decolourisation efficiency reached 90%, COD reduction reached 51% for 120 minutes of treatment. In the case of an initial pH slightly different to 10, the required time to reach 90% ranged from double to triple.

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Treatment of the textile wastewater by electrocoagulation

Cited by 270 publications

References 11 publications

Electrochemical treatment of actual sugar industry wastewater using aluminum electrode

Electrochemical treatment of actual sugar industry wastewater using aluminum electrode

Traitement des effluents d’abattoir de viande rouge par électrocoagulation-flottation avec des électrodes en fer

Removal of Real Textile Dyes by Electrocoagulation/Electroflotation in a Pilot External-Loop Airlift Reactor

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