title: Anodic oxidation of textile wastewaters on boron-doped diamond electrodes.
abstract: The objective of this study is to investigate the potential application of the anodic oxidation (AO) on two electrolytic cells (monopolar (Cell 1) and bipolar (Cell 2)) containing boron-doped diamond electrodes on the treatment of real textile effluents to study the reuse possibility of treated wastewater in the textile industry process. AO is applied in the flocculation coagulation pretreatment of both upstream (BH) and downstream (BS) effluents. The chemical oxygen demand (COD) results show that the final COD removal obtained for the BH effluent in the case of Cell 1 and Cell 2 is 800 and 150 mg O₂L⁻¹ after 5 and 6 h of electrolysis, respectively. The treatments of the BS effluent allow for obtaining a final COD of 76 mg L⁻¹ for Cell 1 and a total mineralization for Cell 2. The obtained results demonstrate that the apparent mineralization kinetics of both effluents when using Cell 2 are about four times faster than the one obtained by Cell 1 and highlight the important contribution of the bipolar cell. Besides, the energy consumption values show that the treatment of the BH effluent by Cell 1 consumes 865 kWh kg COD⁻¹ against 411 kWh kg COD(-1) by Cell 2. Therefore, the use of Cell 2 decreases the energy cost by 2.1-6.65 times when compared to Cell 1 in the case of the BH and BS effluent treatment, respectively.
authors.affiliation: a Laboratory of Wastewater Treatment , Centre of Water Research and Technologies (CERTE) , EchoparkBorjCedria B.P. 273, 8020 Soliman , Tunisia.
authors.forename: NourElHouda
authors.initials: N
authors.lastname: Abdessamad
authors.affiliation: a Laboratory of Wastewater Treatment , Centre of Water Research and Technologies (CERTE) , EchoparkBorjCedria B.P. 273, 8020 Soliman , Tunisia.
authors.forename: Hanene
authors.initials: H
authors.lastname: Akrout
authors.affiliation: a Laboratory of Wastewater Treatment , Centre of Water Research and Technologies (CERTE) , EchoparkBorjCedria B.P. 273, 8020 Soliman , Tunisia.
authors.forename: Latifa
authors.initials: L
authors.lastname: Bousselmi
mesh_terms: D057919:Biological Oxygen Demand Analysis; D001895:Boron / Q000737:chemistry*; D018130:Diamond / Q000737:chemistry*; D004566:Electrodes; D004572:Electrolysis; D005427:Flocculation; D007220:Industrial Waste / Q000032:analysis*; D007700:Kinetics; D010084:Oxidation-Reduction; D059027:Recycling; D013783:Textile Industry; D014865:Waste Disposal, Fluid / Q000379:methods*; D062065:Wastewater / Q000737:chemistry*
chemical_list: D001895:Boron; D018130:Diamond; D007220:Industrial Waste; D062065:Wastewater
keywords: BDD bipolar electrode; anodic oxidation; current efficiency; electrical energy per order; energy consumption; textile effluent