Loading...

Separation and Treatment of Cutting Oil Emulsions using Electrocoagulation

Maleknia, Arash | 2014

681 Viewed
  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 45709 (03)
  4. University: Sharif University of Technology
  5. Department: Chemistry
  6. Advisor(s): Shahrokhian, Saeed; Nazari Alavi, Alireza
  7. Abstract:
  8. Cutting oils are used for reducing friction, cooling and preventing from corrosion in the industry. These oils are mixed in different proportions with water and produce emulsion. In this study, treatment of oil-water emulsions is studied using electrocoagulation with aluminum, copper and stainless steel electrodes as a pretreatment stage. The efficiency of electrocoagulation process was obtained through the measurement of COD removal percentage and or the required time for the treatment. COD is the required oxygen for oxidizing oxidizable materials through oxidizing substances in the solution.In this study, the effect of operating parameters such as emulsion concentration (volume/volume percent of oil in water), voltage, stirring speed of emulsification, initial pH, distance between the electrodes and electrodes surfaces on the efficiency of electrocoagulation process was studied.Results indicated that by reducing the emulsion concentration, increasing voltage, reducing the distance between electrodes and increasing the effective surface of electrodes, the efficiency of oil-water emulsion treatment using all electrodes is increased. Also, in the average stirring speeds of emulsion (150 rpm), more efficiency is observed than other speeds. In initial pH 7 and 9 using aluminum and copper electrodes, respectively, the maximum COD removal efficiency was observed. In addition, it was determined that using stainless steel electrodes for the oil-water emulsion treatment was not possible, due to the lower efficiency. Despite the high efficiency of this type of treatment(electrocoagulation), because of the high level of raw sewage pollution, the water obtained from treatment using electrocoagulation did not have standard conditions and needed the second treatment for being excreted in the environment
  9. Keywords:
  10. Electrocoagulation ; Cutting Oil ; Oil in Water Emulsion

 Digital Object List

 Bookmark

No TOC