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Steel plant CO2 sequestration using high efficiency micro-algal bioreactor

Briefly, this project aims to utilize stack gases, rich in CO2, as a feedstock for growing algal biomass, using an intensified bioreactor design. The intensified bioreactor exploits a recently invented microbubble generation technique which achieves high transfer rates across the gas-liquid interface and therefore accelerates CO2 dispersal, but also strips O2 that the algae respire during photosynthesis. The former should enhance growth rates approximately 10-fold, and the later should remove the toxic / growth inhibition, thus permitting much higher algal densities in production: a target of 20 g/l. Assessing the performance of the design with real industrial stack gases, including its ability to scrub the gas, will determine the feasibility of treating stack gases on a large scale plant with a realistic footprint and high throughput rates.

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