Application of the Optimized Pre-ozonation Treatment for Potential Resource Recovery from Industrial Textile Effluent
TL;DR: In this paper, an optimized pre-ozonation treatment has been proposed for textile effluent, which is optimized for high color, organic load, dissolved solids content and toxicity of the textile effluents.
Abstract: Treatment of the textile effluent becomes complex due to the high color, organic load, dissolved solids content, and toxicity of the textile effluents. An optimized pre-ozonation treatment has been...
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14 Jun 2022
TL;DR: In this article , an experimental study on the decolorization efficiency and degradation of organic compounds from textile wastewater by the ozonation process in a batch system was performed in a 1 L glass reactor with a magnetic stirrer and a bubble diffuser at the bottom to feed the ozone.
Abstract: ABSTRACT This is an experimental study on the decolorization efficiency and the degradation of organic compounds from textile wastewater by the ozonation process in a batch system. The effects of different sample volumes of textile wastewater over time were investigated. The experiments were performed in a 1 L glass reactor with a magnetic stirrer and a bubble diffuser at the bottom to feed the ozone. The applied cumulative ozone dosage varied at 120 gO3 L−1, 60 gO3 L−1, and 30 gO3 L−1, and the total interaction time for each test was 1 h. To investigate the physicochemical properties of the textile wastewater (solid and liquid phases) before and after the treatment, multiple analytical characterization methods were used: Thermal Gravimetric Analysis, Scanning Electron Microscopy coupled with Energy-Dispersive X-ray Spectroscopy, X-ray diffraction, Fourier Transform Infrared spectroscopy, and Spectrophotometer. The most perceptive change was observed in the color of the liquid medium, which turned from black to transparent, and a visual color number indicator known as DurchsichtFarbZahl (DFZ) was used for the evaluation of this process. Absorbance values decreased about 3.5 times after 5 min of treatment with a 0.15 L sample volume, and these values differed for tests with larger sample volumes. FTIR spectroscopy demonstrated that the bands’ intensities associated with the C − H, C − N, and C − O decrease during treatment. On the other hand, it was possible to conclude that combining treatment methods to improve the degradation of persistent compounds after the ozonation process is necessary. Finally, the ozonation of the textile wastewater proved to be effective at removing color due to its high reaction capacity. Graphical Abstract
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TL;DR: The main conclusions arrived at from the overall assessment of the literature are that more work needs to be done on degradation kinetics and reactor modeling of the combined process, and also dynamics of the initial attack on primary contaminants and intermediate species generation.
2,046 citations
"Application of the Optimized Pre-oz..." refers background in this paper
...The textile industry is one of the largest consumers of water, dyes, and auxiliary chemicals at the industrial production scale (Oller, Malato, and Sánchez-Pérez 2011; Padhiyar et al. 2020)....
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TL;DR: Different treatment methods to treat the textile wastewater have been presented along with cost per unit volume of treated water, and the possible remedial measures to treat different types of effluent generated from each textile operation are recommended.
1,335 citations
"Application of the Optimized Pre-oz..." refers methods in this paper
...N = N- group are widely used in the cellulose dyeing operation (Holkar et al. 2016)....
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TL;DR: In this article, the authors present a critical review of the currently available literature regarding typical and real characteristics of the textile effluents, and also constituents including chemicals used for preparing simulated textile wastewater containing dye, as well as the treatments applied for treating the prepared wastewater.
Abstract: Textile industries are responsible for one of the major environmental pollution problems in the world, because they release undesirable dye effluents. Textile wastewater contains dyes mixed with various contaminants at a variety of ranges. Therefore, environmental legislation commonly obligates textile factories to treat these effluents before discharge into the receiving watercourses. The treatment efficiency of any pilot-scale study can be examined by feeding the system either with real textile effluents or with artificial wastewater having characteristics, which match typical textile factory discharges. This paper presents a critical review of the currently available literature regarding typical and real characteristics of the textile effluents, and also constituents including chemicals used for preparing simulated textile wastewater containing dye, as well as the treatments applied for treating the prepared effluents. This review collects the scattered information relating to artificial textile wastewater constituents and organises it to help researchers who are required to prepare synthetic wastewater. These ingredients are also evaluated based on the typical characteristics of textile wastewater, and special constituents to simulate these characteristics are recommended. The processes carried out during textile manufacturing and the chemicals corresponding to each process are also discussed.
963 citations
"Application of the Optimized Pre-oz..." refers background in this paper
...Yaseen and Scholz (2019) present a critical review of the preparation of synthetic textile effluents....
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TL;DR: Use of Fe2+/H2O2/UV combination seems to show a satisfactory COD and color removal performance and to be economically more viable choice for the acetate and polyester fiber dyeing effluent on the basis of 90% removal.
518 citations
"Application of the Optimized Pre-oz..." refers background in this paper
...Various studies have reported the application of ozonation as a polishing stage after the biological treatment of textile effluent (Azbar, Yonar, and Kestioglu 2004; Bilińska, Gmurek, and Ledakowicz 2017; Solmaz et al. 2006)....
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TL;DR: The present review paper elucidates the contributions of membrane technology towards textile effluent treatment and unexhausted raw materials recovery and various accounts dealing with techno-economic evaluation of these membrane based textile wastewater treatment processes have been provided.
392 citations
"Application of the Optimized Pre-oz..." refers background in this paper
...Textile manufacturing processes resulted in the generation of toxic and hazardous effluents (Dasgupta et al. 2015)....
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