Decarbonization of Arthrospira platensis production by using atmospheric CO2 as an exclusive carbon source: proof of principle

被引:1
作者
Jung, C. G. H. [1 ]
Nghinaunye, T. [2 ]
Waldeck, P. [3 ]
Braune, S. [2 ]
Petrick, I. [3 ]
Kuepper, J. -H. [1 ,2 ]
Jung, F. [2 ]
机构
[1] Carbon Biotech Social Enterprise AG, Senftenberg, Germany
[2] Brandenburg Univ Technol Cottbus Senftenberg, Inst Biotechnol Mol Cell Biol, Univ Pl 1, D-01968 Senftenberg, Germany
[3] Brandenburg Univ Technol Cottbus Senftenberg, Inst Biotechnol, Phototroph Biotechnol, Senftenberg, Germany
关键词
Arthrospira platensis; Atmospheric CO2; Biomass production; Climate change; Carbon capturing; Decarbonization; SPIRULINA-PLATENSIS; GROWTH; MICROALGAE; DIOXIDE; ALGAE; PHOTOBIOREACTORS; CHLOROPHYLLS; TECHNOLOGIES; CULTIVATION; BIOFIXATION;
D O I
10.1007/s13762-023-05215-x
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
There is an urgent need to develop technologies for removing CO2 from the atmosphere to combat climate change. Microalgae and cyanobacteria, such as Arthrospira platensis (AP), have shown promise due to their high photoautotrophic biomass production. Conventional AP culture media are supplemented with high concentrations of NaHCO3 since AP utilizes HCO3- as a carbon source. These culture conditions result in significant amounts of CO2 escaping into the atmosphere, instead of being sequestered during cultivation. Here, we investigated whether ambient air (0.042% CO2) can be used for growing AP in a culture medium lacking a fossil-based carbon source. AP was cultured in 2 L glass bioreactors containing: (1) Zarrouk medium with 16.8 g/L NaHCO3 and aeration with 0.236 vvm air with 2% CO2 ("NaHCO3/CO2-based") to compensate carbon loss due to CO2 outgassing, and (2) Zarrouk medium without NaHCO3 and a gas flow with ambient air (0.926 vvm) as the only carbon source ("air-based"). The air-based production resulted in the biofixation of 3.78 g(CO2)/L during the linear growth phase. With NaHCO3/CO2-based production, a comparable amount of 3.42 g(CO2)/L was obtained while 659.12 g of CO2 was released into the atmosphere. Total protein, phycocyanin, chlorophyll-a, and carotenoids were present in similar or increased amounts in AP produced by the air-based method. We concluded that cultivation of AP with Zarrouk medium lacking NaHCO3 but using ambient air with atmospheric CO2 as the only carbon source is possible without reducing productivity. These results improve our understanding of how atmospheric CO2 can be reduced by culturing AP.
引用
收藏
页码:4635 / 4644
页数:10
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