Preparation of Polycarbonate Membrane for Industrial Wastewater Treatment in Membrane Bioreator

Nazemi Dashtarjandi, Saeed | 2015

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 46780 (06)
  4. University: Sharif University of Technology
  5. Department: Materials Science and Engineering
  6. Advisor(s): Mousavi, Abbas; Bastani, Dariush
  7. Abstract:
  8. Today, membrane bioreactors (MBRs) process is one of the most important options in industrial and municipal wastewater treatment. In MBRs, membrane has an essential influence on their performance. In this study, polycarbonate was exploited as membrane to evaluate its performance in MBR since it has excellent mechanical properties. However, polycarbonate is brittle and breaks at low elongation at room temperature. Solution blending was utilized to improve polycarbonate’s properties. Blending membrane was characterized and assessed by scanning electron microscopy (SEM) and tensile strength. Polycarbonate solution blending with polyurehatne which has excellent toughness and flexibility enhance the performance of membrane at MBR. Likewise, polyurethane effect on polycarbonate morphology was evaluated by SEM, atomic force microscopy, water contact angle and performance measurement. Blend polymers of PC/PU (16.5 wt%) were prepared by blending different compositions of polymers, and evaluated by pure water flux (PWF), membrane fouling, critical flux and flux recovery ratio (FRR) in activated sludge system at MBR. Further, the effects of polymer compositions as well as non-solvent swelling agent polyvinylpyrrolidone were analyzed. The results showed that PU played the role of pore former and increase mean pore size of membranes. Furthermore, the increase in PU composition increases membrane hydrophobicity and surface rouphness which boost membrane fouling. In this project, 85/15 membrane composition showes best performance in accordance with membrane fouling. By consideration of membrane with composition of 85/15, and PVP concentration 0.5%wt, membrane structure is improved, and enhances pure water flux
  9. Keywords:
  10. Polycarbonate ; Critical Flux ; Membrane Bioreactor ; Membrane Fouling ; Industrial Sewage ; Waste Treatment ; Polycarbonate-Polyurethane Blending Membrane

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