Photovoltaic-driven microbial protein production can use land and sunlight more efficiently than conventional crops
Population growth and changes in dietary patterns place an ever-growing pressure on the environment. Feeding the world within sustainable boundaries therefore requires revolutionizing the way we harness natural resources. Microbial biomass can be cultivated to yield protein-rich feed and food supple...
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| Veröffentlicht in: | Proceedings of the National Academy of Sciences - PNAS 2021-06, Vol.118 (26), p.1-11 |
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| container_title | Proceedings of the National Academy of Sciences - PNAS |
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| creator | Leger, Dorian Matassa, Silvio Noor, Elad Shepon, Alon Milo, Ron Bar-Even, Arren |
| description | Population growth and changes in dietary patterns place an ever-growing pressure on the environment. Feeding the world within sustainable boundaries therefore requires revolutionizing the way we harness natural resources. Microbial biomass can be cultivated to yield protein-rich feed and food supplements, collectively termed single-cell protein (SCP). Yet, we still lack a quantitative comparison between traditional agriculture and photovoltaic-driven SCP systems in terms of land use and energetic efficiency. Here, we analyze the energetic efficiency of harnessing solar energy to produce SCP from air and water. Our model includes photovoltaic electricity generation, direct air capture of carbon dioxide, electrosynthesis of an electron donor and/or carbon source for microbial growth (hydrogen, formate, or methanol), microbial cultivation, and the processing of biomass and proteins. We show that, per unit of land, SCP production can reach an over 10-fold higher protein yield and at least twice the caloric yield compared with any staple crop. Altogether, this quantitative analysis offers an assessment of the future potential of photovoltaic-driven microbial foods to supplement conventional agricultural production and support resource-efficient protein supply on a global scale. |
| doi_str_mv | 10.1073/pnas.2015025118 |
| format | Article |
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Feeding the world within sustainable boundaries therefore requires revolutionizing the way we harness natural resources. Microbial biomass can be cultivated to yield protein-rich feed and food supplements, collectively termed single-cell protein (SCP). Yet, we still lack a quantitative comparison between traditional agriculture and photovoltaic-driven SCP systems in terms of land use and energetic efficiency. Here, we analyze the energetic efficiency of harnessing solar energy to produce SCP from air and water. Our model includes photovoltaic electricity generation, direct air capture of carbon dioxide, electrosynthesis of an electron donor and/or carbon source for microbial growth (hydrogen, formate, or methanol), microbial cultivation, and the processing of biomass and proteins. We show that, per unit of land, SCP production can reach an over 10-fold higher protein yield and at least twice the caloric yield compared with any staple crop. 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| subjects | Agricultural production Animals Bacterial Proteins - biosynthesis Biological Sciences Biomass Carbon dioxide Carbon sequestration Carbon sources Crop yield Crops, Agricultural - growth & development Dietary Proteins - metabolism Dietary supplements Energy Transfer Humans Land use Microorganisms Natural resources Photovoltaics Population growth Protein folding Proteins Quantitative analysis Single-cell protein Solar Energy Sunlight Traditional farming |
| title | Photovoltaic-driven microbial protein production can use land and sunlight more efficiently than conventional crops |
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