Treatment of textile dye effluents using coagulation–flocculation coupled with membrane processes or adsorption on powdered activated carbon |
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| Authors: | Farida Harrelkas Abdelaziz Azizi Abdelrani Yaacoubi Ahmed Benhammou Marie Noelle Pons |
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| Affiliation: | 1. Department of Chemical Engineering, State University of Maringá, 5790 - Colombo Avenue, zip-code 87020-900 Maringá, Brazil;2. Department of Biotechnology, Genetics and Cell Biology, State University of Maringá, 5790 - Colombo Avenue, zip-code 87020-900 Maringá, Brazil;3. Department of Chemical Engineering, West Paraná State University, 645 - Faculdade Street, zip-code 85903-000 Toledo, PR, Brazil;1. Faculté de Technologie, Université du 20 Août1955, B.P 26 Skikda 21000, Algeria;2. Faculté des sciences, Université du 20 Août1955, B.P 26 Skikda 21000, Algeria;3. Laboratoire LRPCSI, Université du 20 Août1955, B.P 26 Skikda 21000, Algeria;4. Laboratoire de Développement des Energies Renouvelables (LENREZA), Université Kasdi Merbah, BP 511 Ouargla 30000, Algeria;5. Laboratoire de Physique et Mécanique Textiles de l''ENSISA (LPMT), Université de Haute Alsace, 11 rue Alfred Werner, F 68093 Mulhouse CEDEX, France;6. Laboratoire de Chimie et de Méthodologies pour l''Environnement (LCME), Université Paul Verlaine, 1, Boulevard Arago 57078, France |
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| Abstract: | This study describes the treatment of textile wastewater by various combinations of physicochemical and membrane processes. The basic physicochemical treatment consists in coagulation/flocculation (CF) with different coagulant and flocculant concentrations. The parameters analyzed prior and after treatment are turbidity, chemical oxygen demand (COD) and absorbance (Abs). The optimal process parameters for CF are 5 for pH, 100 mg/l for coagulant (Al2(SO4) 3) of 100 mg/l and 4 mg/l for flocculant. This simple treatment by CF was inefficient concerning COD reduction and dyes deterioration. It was therefore combined with microfiltration (MF) or ultrafiltration (UF) on one hand and adsorption on powdered activated carbon (PAC) on the other. The CF/MF, CF/UF and CF/PAC combinations ensure a COD removal of 37%, 42% and more than 80% respectively and a color reduction of 65%, 74% and 50% respectively. |
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