Treatment of food industry wastewater by (OH)-O-center dot-based electrochemical-Fenton method and toxicity evaluation

Ozmen F. K., Gerek E. E., KOPARAL A. S.

DESALINATION AND WATER TREATMENT, vol.233, pp.239-252, 2021 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 233
  • Publication Date: 2021
  • Doi Number: 10.5004/dwt.2021.27593
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Aqualine, Aquatic Science & Fisheries Abstracts (ASFA), Biotechnology Research Abstracts, CAB Abstracts, Environment Index, Geobase, Pollution Abstracts, Veterinary Science Database, Civil Engineering Abstracts
  • Page Numbers: pp.239-252
  • Keywords: Food industry wastewater, (OH)-O-center dot-based electrochemical-Fenton, Response surface methodology, Chemical oxygen demand, umuC, ELECTRO-FENTON, REMOVAL, ELECTROCOAGULATION, OXIDATION, KINETICS, GENOTOXICITY, DEGRADATION, TRANSFORMATION, COAGULATION, WASTEWATERS
  • Anadolu University Affiliated: Yes


This study investigated the treatment of food industry wastewater producing vinegar (OH)-O-center dot-based electrochemical-Fenton (EF) processes using a sacrificial Fe anode in the presence of hydrogen peroxide (H2O2). The influence of current density, electrolyte concentration and H2O2 concentration on (OH)-O-center dot-based EF treatment mechanism, kinetics and toxicity was investigated. Response surface methodology (RSM) was used for the optimization of these EF treatment processes parameters and the genotoxicity of treated water was evaluated with the removal performance after treatment. (OH)-O-center dot-based EF processes achieved consistently yielding 99% chemical oxygen demand (COD) with a current density of 20 mA/cm(2) with the addition of sodium sulfate (Na2SO4) as the supporting electrolyte at a concentration of 5 and 60 mM H2O2 consuming 39.375 kWh/kg energy. RSM study showed that the current density was the most effective parameter on (OH)-O-center dot-based EF processes via determining role in in-situ production of both Fe2+ and H2O2. The beta-galactose induction ratios indicating the occurrence of DNA damage of Salmonella typhimurium TA1535/pSK1002 bacteria exposed to treated and untreated wastewaters were identified in the umuC AQ genotoxicity test, and they were reduced below 1.5 that is the specified limit value for genotoxicity. This study showed that non-biodegradable and toxic vinegar industry wastewater was successfully treated with (OH)-O-center dot-based EF reducing genotoxicity even if it had a high COD value, the first time in the literature.