Biological Regeneration of Used Activated Carbon

Noori Ghezeldareh, Maral | 2021

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 54159 (06)
  4. University: Sharif University of Technology
  5. Department: Chemical and Petroleum Engineering
  6. Advisor(s): Borghei, Mehdi
  7. Abstract:
  8. Tehran Refinery, as an industrial center that has significant water consumption in Tehran, intends to use the flow of water from the treatment plant south of Tehran after final preparation, with the aim of managing water resources and meeting its needs. And it uses a biological activated carbon (BACF) filter to reduce the DOC concentration. In these filters, the removal of organic matter is performed by the adsorption process as well as the biodegradation process by microorganisms grown on activated carbon. The presence of biofilm leads to continuous bio-regeneration of activated carbon during the water treatment process. Therefore, in this study, by examining the performance of these filters in surface adsorption and also the biological degradation of organic matter, the effect of this system on the removal of contaminants from the incoming water flow to these filters in Tehran water treatment plant and its performance in bio-regeneration activated carbon to extend the service life Filters, are tested. For this purpose, in a laboratory model, in addition to the biologically activated carbon filter, a non-biologically activated carbon filter is used by adding Sodium azide to the inlet stream, and a biological filter with a non-absorbent bed (Sand) is used. During a 180-day operation, the results show that the GACF is saturated after 70 days from the start of the operation, while in the BACF the DOC removal continues until the 180th day.Also, the amount of dissolved oxygen consumption and biological activity in BACF is about 1.3 of that in BAF. Also, the amount of DOC removal by the adsorption process in BACF, due to the bio-regeneration of activated carbon, is 0.09 mg/l higher than the amount in GACF
  9. Keywords:
  10. Activated Carbon ; Bioregeneration ; Biological Activated Carbon ; Biological Filter ; Tehran Refinery ; Biological Degradation

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