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Culture of microlagae on industrial exhaust fumes

Technological challenge: Green and decarbonated energy incl. bioprocesses and waste valorization (learn more)

Department: DSUD (CTReg)

Laboratory: Autre DPACA

Start Date: 01-09-2022

Location: Grenoble

CEA Code: SL-DRT-22-0225

Contact: florian.delrue@cea.fr

Photosynthetic microalgae and cyanobacteria have the advantage of being able to transform CO2 into a valuable biomass. They are potentially able to capture and reuse industrial CO2 emissions and therefore mitigate their environmental impact. This use of CO2 of industrial origin in a strategy of bioremediation of GHGs is an essential step so that the microalgae industry can move from a specialty industry (cosmetics, nutraceuticals) to a commodities industry (energy, plastic materials, etc. or even animal proteins). However, the use of CO2 from industrial sources by photosynthetic microorganisms presents biological, chemical and technical difficulties. Indeed, questions arise on the capacity of microalgae to tolerate these gases, on the effect of these gases on the pH and the composition of culture media and on the strategy to be implemented to optimize the bioremediation of these fumes by microalgae. These studies will be carried out using the ABIME experimental bench allowing the culture of microalgae on simulated industrial fumes. This thesis project aims to study the biological, chemical and technological obstacles involved in the culture of microalgae (and by extension of photosynthetic cyanobacteria) on industrial fumes, in order to better identify the levers of change of scale that can be envisaged for move towards a low-cost, large-quantity production model.

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