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Fabrication of Polymer Nano-composite Membrane to Increase its Hydrophilicity for using in MBR Process

Ghazanfari, Davoud | 2014

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 46080 (06)
  4. University: Sharif University of Technology
  5. Department: Chemical and Petroleum Engineering
  6. Advisor(s): Bastani, Daruoosh; Musavi, Abbas
  7. Abstract:
  8. composite membranes with PVC as the matrix, Alumina nanoparticles as filler and PVP as additives, were optimized and built. First, the interaction of PVC, PVP and alumina particles on the membrane structure and its performance was investigated by using Design expert software. The membranes which the software proposed were prepared and pure water permeability and flux decline tests were done according to evaluate the membranes performance in membrane bioreactor (MBR). And the results were imported in software and material effects on the performance of each membrane were analyzed. In order to better assess the efficiency and effectiveness of alumina nanoparticles on membrane, different values of alumina nanoparticles at constant concentration of PVC and PVP which were determined useful in the beginning of work were examined. The effect of nanoparticles concentrations in the polymer matrix were evaluated on the properties of water permeability, membrane resistance, hydrophilic and antifouling properties by using activated sludge in the membrane bioreactor. Membrane structure was studied using SEM test. Membranes containing nanoparticles showed better anti-fouling properties compared to the membrane without nanoparticles. Membranes pores size, flux and recovery ratio initially increased and then decreased. However, the hydrophilicity of the membranes continuously increased with an increase in the percentage of nanoparticles. The optimum percentage of Al2O3 immobilized membranes for MBR application in terms of highest membrane permeability and lowest fouling rate was %2.5 weight fraction of Al2O3 with PVC
  9. Keywords:
  10. Hydrofilicity ; Nanocomposite Membrane ; Membrane Bioreactor ; Decline Fouling

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