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Experimental Study of Microbial Fuel Cell

Khazraei Vizhemehr, Ali | 2009

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 40004 (06)
  4. University: Sharif University of Technology
  5. Department: Chemical and Petroleum Engineering
  6. Advisor(s): Kariminia, Hamid Reza; Yaghmaei, Soheila
  7. Abstract:
  8. Annually, global energy demand increases. Although oil products meet much part of this demand currently, soaring sustainable supply difficulties and pollution global warming related problems considered as main barriers against reviving alternative energy technologies. To make fundamental changes in global economy, it is necessary to change human lifestyle radically. Such changes will affect all life levels. Fuel sells are a possible (and partial) solution. Fuel cells with proton exchange membrane have better performance in low temperature and more yield compared to other kinds of fuel cells. Microbial Fuel Cells present the newest way for electricity production (from Biomass). A well plan has a relative large surface of electrode with proper linking properties and low internal resistance that makes it possible to distribute substrate adequately and steadily. Subtle understanding of organic oxidation and electron transfer to anode electrode can open new horizons to understand the diverse breathing capabilities of microbes. To examine electricity current generation by bacteria, a bi-chamber fuel cell was built. Graphite and platinum electrode and also Nafion and Gore-Tex membranes were utilized. By different wastes along with separate substrates, the optimum range for COD was 210 to 230 (mg/l).System curves in various states (current vs time) in addition to polarization curves and as a result internal resistances were calculated. The best result was 1.2 (A/m2) for semi-Batch condition and the greatest power output was 0.15 (mW) in 15nd day, which both of them were related to second sludge (waste of a nitrification-denitrification MBBR) with Nafion membrane. Numerical relations and statics distribution were done for data then the best models that anticipate the behavior of system, was selected (Rational A with Offset). Modeling based on distinct equations for each of the system sections with simple hypothesis of experimental pilot was done and the results were compared experimentally and analytically
  9. Keywords:
  10. Microorganisms ; Membranes ; Electron Transition ; Electrodes ; Fuel Cell ; Electricity Production

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