Journal
BIOTECHNOLOGY AND BIOENGINEERING
Volume 116, Issue 7, Pages 1604-1611Publisher
WILEY
DOI: 10.1002/bit.26974
Keywords
alkalinity; BECCS; Cyanobacteria consortium; direct carbon capture; photosynthesis; soda Lakes
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Funding
- University of Calgary
- Natural Sciences and Engineering Research Council of Canada
- Canada Foundation for Innovation
- CANADA FIRST RESEARCH EXCELLENCE FUND
- GOVERNMENT OF ALBERTA
- Alberta Innovates
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Bioenergy with carbon capture and storage (BECCS) is recognized as a potential negative emission technology, needed to keep global warming within safe limits. With current technologies, large-scale implementation of BECCS would compromise food production. Bioenergy derived from phototrophic microorganisms, with direct capture of CO2 from air, could overcome this challenge and become a sustainable way to realize BECCS. Here we present an alkaline capture and conversion system that combines high atmospheric CO2 transfer rates with high and robust phototrophic biomass productivity (15.2 +/- 1.0 g/m(2)/d). The system is based on a cyanobacterial consortium, that grows at high alkalinity (0.5 mol/L) and a pH swing between 10.4 and 11.2 during growth and harvest cycles.
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