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Investigation of The Treatment of Wastewater Containing Antibiotics by Using MBBR

Saki, Abbas | 2020

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 52635 (06)
  4. University: Sharif University of Technology
  5. Department: Chemical and Petroleum Engineering
  6. Advisor(s): Borghei, Mehdi
  7. Abstract:
  8. Antibiotic medications are widely used in medicine and veterinary medicine. Since these drugs are extremely dangerous to the environment and specially to drinking water for humans and other organisms, the need to treat these wastewater is becoming increasingly important. One of the most commonly used antibiotics is oxytetracycline which is used for a wide range of infectious diseases Husbandry wastewater is one of the wastewaters that contains high diversity and large amounts of antibiotics. In this study, the performance of a Moving bed biofilm reactor (MBBR) was investigated for removal of oxytetracycline from synthetic wastewater with similar characteristics to Husbandry wastewater. A reactor with the volume of 8.5 liters was selected and 50% of its Volume filled with Kaldnes packing. pH was controlled around the neutral range and temperature was equal to ambient temperature. Mixed liquor suspended solids concentration was 5000 mg/lit and attached growth measured about 29 g/m2. Experiments were tested at different drug concentrations from 0.2 to 100 mg/l, two hydraulic retention times of 10 and 14 hour, and two chemical oxygen demands of 1000 and 2500 mg/l, and the results of chemical oxygen demand and concentration of The drugs were measured by spectropHotometry method. Experiments showed that as the concentration of oxytetracycline increased from 0.5 mg/l to 50 mg/l, its removal percentage increased from 38% to 66%. It was also observed that the amount of drug removal improved with increasing hydraulic retention time and also with increasing oxygen demand. Finally, the reactor performance for oxytetracycline removal was modeled using First order substrate removal model, Grau second order model and Stover- Kincannon model and found that the Stover- Kincannon model was very suitable for predicting reactor performance for oxytetracycline
  9. Keywords:
  10. Waste Water ; Waste Treatment ; Chemical Oxygen Demand (COD) ; Antibiotic ; Moving Bed Biofilm Reactor (MBBR)

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