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Optimization of Aeration & Dissolved Oxygen Concentration in Moving Bed Bio Reactors

Shokrani Baighi, Mahdi | 2012

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 43054 (06)
  4. University: Sharif University of Technology
  5. Department: Chemical and Petroleum Engineering
  6. Advisor(s): Borghei, Mehdi
  7. Abstract:
  8. In this research the performance of the Moving Bed Biofilm Rector (MBBR) in different amounts of dissolved oxygen (DO) was investigated. Reactor with a useful volume of 15 liters was used in this study. In order to obtain optimum oxygen concentration, stayed at 6, 10 and 15 hours, and at different levels of dissolved oxygen in the range 0.5 -6 mg/lit, the amount of organic material was removed respectively. Also, in two different aeration intensity of 3.5 and 5.5 liters per minute at different values of e% (percentage of filling of media) the mass transfer coefficient values were obtained. When the aeration intensity increases from 3.5 to 5.5 liters per minute, and the percentage of 40% filling, the mass transfer coefficient increases from 0.187 min-1 to be 0.234 min-1. Relationship between mass transfer coefficient and the percentage of filling at a constant aeration is relational grade 2, respectively. Biofilm growth and its thickness was also measured in the dissolved oxygen concentration of 4-5 mg / lit than the thickness of biofilm formed in the dissolved oxygen of 0.5-3 mg / lit, is about 40 microns. The relationship of biofilm grown in the continuous phase, with the relation of order 3, respectively. Data from experiments with model Kincannon-Stover and Monod were fitted, which was the model Kincannon-Stover is an appropriate model to fit the data
  9. Keywords:
  10. Aeration ; Waste Treatment ; Moving Bed Biofilm Reactor (MBBR) ; Dissolved Oxygen ; Mass Transfer Coefficient

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