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Determination of the Optimal Conditions for Treatment of Lubricating Oils Wastewater in a Continuous Electrocoagulation Reactor

Hosseini, Mehri | 2021

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 54420 (06)
  4. University: Sharif University of Technology
  5. Department: Chemical and Petroleum Engineering
  6. Advisor(s): Fotovat, Farzam
  7. Abstract:
  8. Electrocoagulation (EC) is an effective process in the treatment of oily wastewater, however, only a few studies have explored the parameters affecting the efficient design of the reactors employed in this process. In this study, a statistical investigation on the factors affecting the design of a continuous electrocoagulation reactor was performed by running the tests designed based on the design of experiments (DOE) principles. The explored design variables were current density (30-80 A/m2), reactor residence time (10-30 min), and the ratio of anode surface to the reactor volume (15-45 m2/m3), which were optimized by the response surface method (RSM) to maximize the amount of oil removal and minimize the amount of energy consumption. The optimal values of current density, retention time, and the ratio of electrode surface to reactor volume (S/V) was obtained 30 A/m2, 25 min, and 35 m2/m3, respectively. Under these optimal conditions, the efficiency of oil removal from the synthetic and real wastewater was 99% and 90.5%, respectively, and the required energy to achieve these efficiencies was determined 0.97 kWh/m3. The results of this research can be used to design an efficient EC reactor on an industrial scale for the treatment of oily wastewater
  9. Keywords:
  10. Electrocoagulation ; Reactor Design ; Oily Wastewater ; Current Density ; Optimization ; Response Surface Method ; Central Composite Design ; Electrode Surface Area-to-Rector Volume Ratio

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