Rainwater-driven microbial fuel cells for power generation in remote areas
| Autor: | Ahmed S. Yasin, Mohamed Taha Amen, Seong-Tshool Hong, Mohamed I. Hegazy, Mohammad Abu Hena Mostafa Jamal, Nasser A.M. Barakat |
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| Přispěvatelé: | Amen, Mohamed Taha, Yasin, Ahmed S, Hegazy, Mohamed I, Jamal, Mohammad Abu Hena Mostafa, Hong, Seong-Tshoo, Barakat, Nasser AM |
| Rok vydání: | 2021 |
| Předmět: | |
| Zdroj: | Royal Society Open Science Royal Society Open Science, Vol 8, Iss 11 (2021) |
| ISSN: | 2054-5703 |
| Popis: | The possibility of using rainwater as a sustainable anolyte in an air-cathode microbial fuel cell (MFC) is investigated in this study. The results indicate that the proposed MFC can work within a wide temperature range (from 0 to 30°C) and under aerobic or anaerobic conditions. However, the rainwater season has a distinct impact. Under anaerobic conditions, the summer rainwater achieves a promised open circuit potential (OCP) of 553 ± 2 mV without addition of nutrients at the ambient temperature, while addition of nutrients leads to an increase in the cell voltage to 763 ± 3 and 588 ± 2 mV at 30°C and ambient temperature, respectively. The maximum OCP for the winter rainwater (492 ± 1.5 mV) is obtained when the reactor is exposed to the air (aerobic conditions) at ambient temperature. Furthermore, the winter rainwater MFC generates a maximum power output of 7 ± 0.1 mWm−2at a corresponding current density value of 44 ± 0.7 mAm−2at 30°C. While, at the ambient temperature, the maximum output power is obtained with the summer rainwater (7.2 ± 0.1 mWm−2at 26 ± 0.5 mAm−2). Moreover, investigation of the bacterial diversity indicates thatLactobacillusspp. is the dominant electroactive genus in the summer rainwater, while in the winter rainwater,Staphylococcusspp. is the main electroactive bacteria. The cyclic voltammetry analysis confirms that the electrons are delivered directly from the bacterial biofilm to the anode surface and without mediators. Overall, this study opens a new avenue for using a novel sustainable type of MFC derived from rainwater. |
| Databáze: | OpenAIRE |
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