Hybrid and combined electro-oxidation and peroxi-coagulation processes in effective treatment of textile reverse osmosis concentrate

YAZICI GÜVENÇ S., Bayat M. E., CAN GÜVEN E., VARANK G.

Chemical Engineering Science, vol.298, 2024 (SCI-Expanded) identifier

  • Publication Type: Article / Article
  • Volume: 298
  • Publication Date: 2024
  • Doi Number: 10.1016/j.ces.2024.120365
  • Journal Name: Chemical Engineering Science
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Aerospace Database, Aqualine, Biotechnology Research Abstracts, Chemical Abstracts Core, Chimica, Communication Abstracts, Compendex, INSPEC, Metadex, Pollution Abstracts, zbMATH, DIALNET, Civil Engineering Abstracts
  • Keywords: Electro-oxidation, Energy consumption, Hybrid and combined process, Peroxi-coagulation, Reverse Osmosis Concentrate
  • Yıldız Technical University Affiliated: Yes

Abstract

In this study, the treatment of reverse osmosis concentrate from a textile industry by hybrid and combined electrochemical processes was investigated. Firstly, the operating parameters of single electro-oxidation (EO) and peroxi-coagulation (PC) processes were optimized, and then the performances of hybrid EO-PC, PC-EO, and combined EO/PC processes were evaluated in pollutant removal under optimum conditions. Optimum conditions for processes were determined as pH: 5, 22.5 mA/cm2, inter-electrode distance: 3 cm, 120 min. Removal efficiency of chemical oxygen demand (COD) for the optimum conditions of EO, PC, EO-PC, PC-EO, and EO/PC were 78.5 %, 73.0 %, 73.8 %, 82.0 %, and 91.9 %, respectively. Specific energy consumption of EO, PC, EO-PC, PC-EO, and EO/PC processes were 61.9, 74.0, 64.0, 60.9, and 56.8 kWh/kg COD, respectively. The EO/PC process was the most effective and feasible one among applied single, hybrid, and combined processes. With the EO/PC, reverse osmosis concentrate met the receiving environment discharge criteria.