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Effects of Electrocoagulation Physical Parameters on Membrane Fouling in Submerged Membrane Electro-Bioreactors

Radmehr, Shahla | 2018

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 51427 (06)
  4. University: Sharif University of Technology
  5. Department: Chemical and Petroleum Engineering
  6. Advisor(s): Ghotbi, Cyrus; Shayegan, Jalaloddin
  7. Abstract:
  8. Submerged Membrane Electro-Bioreactor (SMEBR) was invented to increase the efficiency of Membrane Bioreactor (MBR) systems by reducing the fouling amount. The objective of this study was to understand the physical effects of Electrocoagulation (EC) method on membrane fouling and compares the critical flux number by applying electricity under different conditions and without any electrifying. This paper measured the critical flux, that obtained under different process condition including different MLSS concentrations (8000 ppm, 5000 ppm, 2000 ppm), different current densities and electrodes distance. The best result was obtained during highest CD (30 mA/cm2) and lowest distance of electrodes (1 cm) and medium MLSS (5000 ppm). The critical in this condition was equal to 48 LMH which was 28 LMH higher than MLSS 5000 ppm without any electrifying. Also, the effect of electrifying time on activity of microorganisms was studied by measuring the EPS, SMP, MLVSS and SOUR. All parameters decreased by increasing the time of electrifying. Finally, the effect of continuous electrifying mode and electrical exposure modes was compared on membrane fouling. It was found that continuous mode reduce the membrane fouling more
  9. Keywords:
  10. Membrane Bioreactor ; Membrane Fouling ; Hybrid System ; Critical Flux ; Electrocoagulation ; Submerged Membrane Electro-Bioreactor (SMEBR)

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