Journal article

Direct Air Capture of CO2 by Microalgae with Buoyant Beads Encapsulating Carbonic Anhydrase

Xiaoyin Xu, Sandra E Kentish, Gregory JO Martin

ACS SUSTAINABLE CHEMISTRY & ENGINEERING | AMER CHEMICAL SOC | Published : 2021

Abstract

Microalgae cultures have promise as a CO2sink for atmospheric carbon and as a sustainable source of food and chemical feedstocks. However, large-scale microalgae cultivation is currently limited by the need to provide carbon dioxide from point sources, as the diffusion of atmospheric CO2is too slow. Carbonic anhydrase (CA) is an effective enzyme to facilitate the dissolution of atmospheric CO2that could be used to enhance the photosynthetic uptake of this greenhouse gas. Here we investigate a means of retaining CA at the surface of algae ponds to facilitate direct air capture by cross-linking CA with glutaraldehyde (GA) before encapsulation into buoyant calcium alginate beads. Coomassie Blue..

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Grants

Awarded by Australian Research Council (ARC)


Funding Acknowledgements

This work was generously supported by the Pratten Foundation. Funding was also provided by the Australian Research Council (ARC) through the Discovery Projects Grant Scheme (DP200101230). The authors would also like to acknowledge the Particulate Fluids Processing Centre and the Peter Cook Centre at the University of Melbourne for access to instruments. X.X. is grateful to the University of Melbourne for providing a Melbourne Research Scholarship.