Innovative combined technique for high concentration of azo dye AR18 wastewater treatment using modified SBR and enhanced Fenton process as post treatment |
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| Institution: | 1. Civil and Environmental Engineering Department, Amirkabir University of Technology, Hafez Ave., Tehran 15875-4413, Iran;2. Department of Chemistry, Amirkabir University of Technology, Hafez Ave., Tehran 15875-4413, Iran;1. College of Biological and Environmental Sciences, Zhejiang Wanli University, Ningbo 315100, PR China;2. Korean Bioinformation Center (KOBIC), Korea Research Institute of Bioscience and Biotechnology, Daejeon 305-806, Republic of Korea;3. Department of Bioinformatics, University of Sciences and Technology, Daejeon 305-350, Republic of Korea;4. Department of Dermatology, Sungkyunkwan University School of Medicine, Samsung Medical Center, Seoul 135-710, Republic of Korea;5. Zhejiang Provincial Key Laboratory of Applied Enzymology, Yangtze Delta Region Institute of Tsinghua University, Jiaxing 314006, PR China;1. Department of Molecular Biotechnology and Kumho Life Science Laboratory, College of Agriculture and Life Sciences, Chonnam National University, Gwangju 500-757, Republic of Korea;2. Zavoisky Physical - Technical Institute, Sibirsky tract, 10/7, Kazan 420029, Russia;1. von Karman Institute, Environmental and Applied Fluid Dynamics Department, 72, Chaussée de Waterloo, B1640 Rhode-St-Genèse, Belgium;2. Department of Mechanical and Materials Engineering, Queen''s University, Kingston, Ontario, Canada;3. Ecole des Mines d’Alès, Laboratoire Génie de l’Environnement Industriel, Alès, France;4. CEA, DAM, GRAMAT, F-46500 Gramat, France |
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| Abstract: | The purpose of this research was to evaluate the performance of combined biological/advanced oxidation process (AOP) system for treatment of wastewater containing high concentration (500 mg/L) of azo dye Acid Red 18 (AR18). Two alternating anaerobic–aerobic sequencing batch reactors (SBR1 and SBR2 without and with external feeding at the beginning of aeration cycle, respectively) were operated. The effluent of the SBRs was then post treated through enhanced Fenton process (using zero-valent iron combined with ultrasonic irradiation). More than 90% and 97% of COD was removed in the combined SBR/AOP system without external carbon source (CTS1) and with external feeding (CTS2), respectively. The analysis of dye and its metabolites using UV–vis and HPLC analysis also proved that 99% of the original dye was decolorized and more than 89% of its metabolites were degraded through CST2 which is significantly higher than the reported values in the literature. Besides, more than 87% of phosphorus removal efficiency was obtained in CST2 compared to only 54.5% removal efficiency in CST1. Regarding the findings of this study, the proposed combined treatment system (CTS2) can be suggested as an effective technique for treatment of high azo dye AR18 concentration wastewater. |
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| Keywords: | Acid Red 18 decolorization Alternating anaerobic–aerobic modified SBR Biodegradation Enhanced Fenton process External feeding |
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