Evaluation of a sustainable dye-exhausted resin regeneration method for cost-effective decolorization and detoxification of textile wastewater

IF 5.1 2区工程技术 Q1 ENGINEERING, MULTIDISCIPLINARY

Engineering Science and Technology-An International Journal-Jestech Pub Date : 2025-01-30 DOI:10.1016/j.jestch.2025.101973

Amel Taher Moh Rabti , Akin Emrecan Gok , Burak Yuzer , Huseyin Selcuk

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Abstract

Despite the efficiency of the ion exchange (IEX) process in eliminating color and toxicity from textile wastewater, its extensive application is hindered by the challenges associated with recovering dye-exhausted resin using conventional regeneration methods. Thus, hazardous polymer-based decolorants are currently used to meet color standards and produce vast amounts of hazardous sludge. This study focuses on the hydrothermal alkaline regeneration (HTAR) method for regenerating exhausted strong-base anionic ion resin as an alternative to the hazardous decolorization method. It mainly emphasizes its application with trademarked regenerant (Veritas Regenerant®) after the resin was employed for decolorization and detoxification of biologically treated textile wastewater (BTTWW), aiming at sustainable treatment and reuse of such wastewater without producing hazardous sludge. The performance of the regenerated resin was assessed through various parameters, including toxicity (Microtox® test), color, chemical oxygen demand (COD), and total dissolved organic carbon (DOC). On average, the anionic IEX process achieved the removal of 96 % of color, 74 % of DOC, 43 % of COD, and 60 % of toxicity from BTTWW. Complete recovery of the resin was successfully attained using the HTAR method at 40 °C. Notably, the performance of the resin remained consistent over 50 multiple exhaustion/regeneration cycles, indicating the viability of HTAR for regenerating color-exhausted resin for repeated utilization in the treatment and reuse of biological textile wastewater. These results underscore the potential of trademarked regenerant in HTAR to improve the pre-treatment of textile wastewater before membrane wastewater reuse systems while also potentially reducing operational color removal costs in the textile sector, estimated at approximately 0.26–0.50 €/m³, to around 0.08 €/m³.

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来源期刊

Engineering Science and Technology-An International Journal-Jestech Materials Science-Electronic, Optical and Magnetic Materials

CiteScore

11.20

自引率

3.50%

发文量

153

审稿时长

22 days

期刊介绍： Engineering Science and Technology, an International Journal (JESTECH) (formerly Technology), a peer-reviewed quarterly engineering journal, publishes both theoretical and experimental high quality papers of permanent interest, not previously published in journals, in the field of engineering and applied science which aims to promote the theory and practice of technology and engineering. In addition to peer-reviewed original research papers, the Editorial Board welcomes original research reports, state-of-the-art reviews and communications in the broadly defined field of engineering science and technology. The scope of JESTECH includes a wide spectrum of subjects including: -Electrical/Electronics and Computer Engineering (Biomedical Engineering and Instrumentation; Coding, Cryptography, and Information Protection; Communications, Networks, Mobile Computing and Distributed Systems; Compilers and Operating Systems; Computer Architecture, Parallel Processing, and Dependability; Computer Vision and Robotics; Control Theory; Electromagnetic Waves, Microwave Techniques and Antennas; Embedded Systems; Integrated Circuits, VLSI Design, Testing, and CAD; Microelectromechanical Systems; Microelectronics, and Electronic Devices and Circuits; Power, Energy and Energy Conversion Systems; Signal, Image, and Speech Processing) -Mechanical and Civil Engineering (Automotive Technologies; Biomechanics; Construction Materials; Design and Manufacturing; Dynamics and Control; Energy Generation, Utilization, Conversion, and Storage; Fluid Mechanics and Hydraulics; Heat and Mass Transfer; Micro-Nano Sciences; Renewable and Sustainable Energy Technologies; Robotics and Mechatronics; Solid Mechanics and Structure; Thermal Sciences) -Metallurgical and Materials Engineering (Advanced Materials Science; Biomaterials; Ceramic and Inorgnanic Materials; Electronic-Magnetic Materials; Energy and Environment; Materials Characterizastion; Metallurgy; Polymers and Nanocomposites)