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Performance Evaluation of Nitrate Removal from Drinking Water Using Microbial Fuel Cell

Irani, Vahid | 2014

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 46392 (03)
  4. University: Sharif University of Technology
  5. Department: Chemistry Science
  6. Advisor(s): Gobal, Freydoon; Sajadi, Ali Albar
  7. Abstract:
  8. Nitrate can be used as an oxidant in a cathode chamber of microbial fuel cell. Nitrate is known to be a pollutant of water particularly underground water and is considered a carcinogen of water. Nitrate was used in the cathode chamber of a microbial fuel cell as an oxidant that lead to simultaneous generation of electricity, removal of organic matter in anode, and removal of nitrate in the cathode. Using nitrate generated a voltage of 151 mV with an external resistance of 1000Ω. The maximum power density achieved was 1.375 mW/m2 with an external resistance of 800Ω. Seven days after the cell became operational and without the presence of a catalyst, the amount of COD had decreased by 25 percent. In addition, the amount of nitrate had decreased from 50 mg/L to 43mg/L. during 28 days of operation, daily removal of 13 mg/L of COD was achieved, and after the conclusion of this period of cell operation a decrease of 78 percent was observed for COD. In addition, Hexacyanoferrate was utilized as oxidant in the cathode and the generated voltage was 4.5 times the voltage generated by using the nitrate. The amount of generated voltage by using oxygen was also higher than the voltage generated by nitrate. The columbic efficiency of the process during 28 days of operation was reported to be 40 percent. The results indicate that we can use nitrate as an oxidant in the cathode of the microbial fuel cell, enabling us simultaneously to remove nitrate and organic matter as pollutants of water
  9. Keywords:
  10. Microbial Fuel Cell ; Nitrate Removal ; Electricity Production ; Organic Removal ; Energy Production ; Cathode Chamber

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