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Evaluation of Vermifilter Efficiency in Petroleum Wastewater Treatment (BTEX)

Kanani, Matin | 2021

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 54162 (09)
  4. University: Sharif University of Technology
  5. Department: Civil Engineering
  6. Advisor(s): Torkian, Ayub; Mirzai, Mohammad
  7. Abstract:
  8. The aim of this thesis was to find the optimum retention time for treatment of synthetic petroleum wastewater by a wastewater treatment system made with a bucket, mineral material and earthworms residing in a vermibed. In order to make the desired flow happen, height difference was utilized. The polluting substance used for making wastewater was BTEX. As the wastewater was synthetic, the concentration was also a variable. The ultimate soluble concentration was 3200 mg/l and more concentrations were not tested. Parameters such as number of worms, worm’s growth rate and their distribution pattern, humidity amount and distribution and worm’s acclimatization time during organic loading shock were determined.Optimum retention time was found first, then higher concentrations were tested. The optimum retention time for a constant concentration of 800 mg/l was 4 hours, among retention times of 4, 6 and 8 hours. Efficiency for this method based on chemical oxygen demand for mentioned retention times were 96, 92 and 93 percent respectively. Hydraulic loading rates were 0.004, 0.0026 and 0.019 m/hr respectively. Corresponding flows were 6.25, 4.17 and 3.125 l/hr. Flow had to be kept below a specific rate to prevent inundation
  9. Keywords:
  10. BTEX ; Chemical Oxygen Demand (COD) ; Vermi Filter ; Retention Time ; Loading Capacity ; Artificial Wastewater

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