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Investigation of Membrane Fouling in Submerged Membrane Electro-Bioreactor (SMEBR) with Iron Electrodes

Dehghani Tafti, Alireza | 2014

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 45359 (09)
  4. University: Sharif University of Technology
  5. Department: Civil Engineering
  6. Advisor(s): Vosoughi, Manoochehr
  7. Abstract:
  8. This thesis presents the results of the performance of a novel technology called submerged membrane electro-bioreactor (SMEBR). The SMEBR treats wastewater by combining membrane filtration, electrokinetic phenomena, and biological processes in one reactor, and improves treatment performance while helping to control membrane fouling. The newly designed SMEBR system was based on applying an intermittent direct current (DC) field between immersed perforated electrodes around a membrane filtration module. The SMEBR system significantly reduced the fouling rate when iron worked as electrodes and an intermittent DC with an operational different mode was applied.
    In Phase 1 of this project, the current density and time-frequency electric field was optimized by Design Expert software in 10 different states, and each state run for 14 days continuously, finally, the current density of 12 mA and time-frequency 2 (400 seconds off - 200 seconds on)was regarded as the best.
    In Phase 2 of this project a control membrane bioreactor and electrical membrane bioreactor at optimal conditions was run in 25 days. In electrical membrane bioreactor, Average removal efficiency of COD, phosphate and ammonia was 97, 81 and 90%, respectively, while in the membrane bioreactor, average removing COD, phosphate and ammonia was 94, 45 and 79 percent respectively. Also, sludge filtration properties in electrical membrane bioreactor was improved by 50% and protein and polysaccharide of soluble microbial product decreased by 26 and 38 percent, respectively
  9. Keywords:
  10. Membrane Fouling ; Soluble Microbial Product (SMP) ; Electrocoagulation ; Submerged Membrane Electro-Bioreactor (SMEBR)

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