Electricity Production Coupled to Ammonium in a Microbial Fuel Cell
| Autor: | Jinjun Kan, Florian Mansfeld, Kenneth H. Nealson, Zhen He, Yuelong Huang, Yanbing Wang |
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| Rok vydání: | 2009 |
| Předmět: |
Electrophoresis
Ammonium sulfate Nitrates Microbial fuel cell Bacteria Bioelectric Energy Sources Ammonium phosphate Inorganic chemistry General Chemistry Hydrogen-Ion Concentration Quaternary Ammonium Compounds chemistry.chemical_compound Electricity chemistry Anammox Environmental chemistry Environmental Chemistry Ammonium chloride Ammonium Nitrification Electrodes Nitrites Ammonium sulfamate |
| Zdroj: | Environmental Science & Technology. 43:3391-3397 |
| ISSN: | 1520-5851 0013-936X |
| DOI: | 10.1021/es803492c |
| Popis: | The production of electricity from ammonium was examined using a rotating-cathode microbial fuel cell (MFC). The addition of ammonium chloride, ammonium sulfate, or ammonium phosphate (monobasic) resulted in electricity generation, while adding sodium chloride, nitrate, or nitrite did not cause any increase in current production. The peak current increased with increasing amount of ammonium addition up to 62.3 mM of ammonium chloride, suggesting that ammonium was involved in electricity generation either directly as the anodic fuel or indirectly as substrates for nitrifiers to produce organic compounds for heterotrophs. Adding nitrate or nitrite with ammonium increased current production compared to solely ammonium addition. Using 16S rRNA-linked molecular analyses, we found ammonium-oxidizing bacteria and denitrifying bacteria on both the anode and cathode electrodes, whereas no anammox bacteria were detected. The dominant ammonium-oxidizing bacteria were closely related to Nitrosomonas europaea. The present MFC achieved an ammonium removal efficiency of 49.2 +/- 5.9 or 69.7 +/- 3.6%, depending on hydraulic retention time, but exhibited a very low Coulombic efficiency. |
| Databáze: | OpenAIRE |
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