Development of a longevous two-species biophotovoltaics with constrained electron flow
| Autor: | Wei Zhang, Yanping Zhang, Haichun Gao, Yin Li, Jie Zhou, Huawei Zhu, Hengkai Meng |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
0301 basic medicine
Shewanella Bioelectric Energy Sources Science General Physics and Astronomy 02 engineering and technology Photosynthesis Article General Biochemistry Genetics and Molecular Biology Applied microbiology 03 medical and health sciences Electricity Solar energy Lactic Acid Renewable Energy Power output lcsh:Science Power density Synechococcus Photons Multidisciplinary biology Chemistry business.industry Electrochemical Techniques General Chemistry Microbial consortium 021001 nanoscience & nanotechnology biology.organism_classification Renewable energy 030104 developmental biology lcsh:Q Electron flow 0210 nano-technology business Biological system Metabolic engineering |
| Zdroj: | Nature Communications, Vol 10, Iss 1, Pp 1-12 (2019) Nature Communications |
| ISSN: | 2041-1723 |
| Popis: | Microbial biophotovoltaics (BPV) offers a biological solution for renewable energy production by using photosynthetic microorganisms as light absorbers. Although abiotic engineering approaches, e.g., electrode modification and device optimization, can enhance the electrochemical communication between living cells and electrodes, the power densities of BPV are still low due to the weak exoelectrogenic activity of photosynthetic microorganisms. Here, we develop a BPV based on a d-lactate mediated microbial consortium consisting of photosynthetic cyanobacteria and exoelectrogenic Shewanella. By directing solar energy from photons to d-lactate, then to electricity, this BPV generates a power density of over 150 mW·m−2 in a temporal separation setup. Furthermore, a spatial-temporal separation setup with medium replenishment enables stable operation for over 40 days with an average power density of 135 mW·m−2. These results demonstrate the electron flow constrained microbial consortium can facilitate electron export from photosynthetic cells and achieve an efficient and durable power output. Power densities of existing microbial biophotovoltaics (BPV) are low and unendurable. Here, the authors develop a BPV based on d-lactate mediated microbial consortium, which can generate an average power density of 135 mW·m−2 for over 40 days in a spatial-temporal separation setup with medium replenishment. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|