Electrocoagulation/Electroflotation Process for Removal of Organics and Microplastics in Laundry Wastewater

Akarsu C., Deniz F.

Clean - Soil, Air, Water, cilt.49, sa.1, 2021 (SCI-Expanded, Scopus) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 49 Sayı: 1
  • Basım Tarihi: 2021
  • Doi Numarası: 10.1002/clen.202000146
  • Dergi Adı: Clean - Soil, Air, Water
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Aqualine, Aquatic Science & Fisheries Abstracts (ASFA), BIOSIS, Biotechnology Research Abstracts, CAB Abstracts, Chemical Abstracts Core, Environment Index, Geobase, Greenfile, INSPEC, Pollution Abstracts, Veterinary Science Database
  • Anahtar Kelimeler: electrocoagulation, electroflotation, laundry wastewater, microplastics, organic matter removal, response surface method
  • İstanbul Üniversitesi-Cerrahpaşa Adresli: Hayır

Özet

In the present research, laundry wastewater treatment is studied using the electrocoagulation/electroflotation process. For the optimization of treatment conditions such as electrode type (Al–Al, Al–Fe, Fe–Fe, and Fe–Al), initial pH (5–9), current (0.54–2.16 A), and application time (15–60 min), response surface methodology is used. Removal efficiencies of chemical oxygen demand (COD), color, anionic surfactant, microplastic, and phosphate are studied. It is determined that the most effective removal is obtained with 2.16 A current, pH 9, and 60 min reaction time using Fe–Al electrode. Here, 91%, 94%, 100%, and 98% removal efficiencies are achieved for COD, surfactant, color, and microplastic, respectively. The operating cost of the combined process is calculated as $1.32 m−3 for the optimum removal parameters. The adsorption kinetics study shows that the removal follows second-order kinetics. The laboratory-scale test results indicate that the electrocoagulation/electroflotation process is feasible for the treatment of laundry wastewater.