COCCINELLE Project

Coccolithophores and calcifying cyanobacteria for the use and long-term storage of carbon

Biomineralisation of CO₂ by precipitation of calcium carbonate (CaCO₃) is a widespread phenomenon in marine, freshwater and terrestrial ecosystems, playing a central role in the global carbon cycle. Calcifying micro-organisms, in particular coccolithophores and calcifying cyanobacteria, play an active role in this process, offering promising prospects for capturing, recovering and sustainably storing CO₂ from industrial activities.

The COCCINELLE project explores the potential of these biological mechanisms for the long-term storage of carbon and examines the opportunities for adding value to the products formed. This multidisciplinary project brings together experts in bioprocesses, analytical biochemistry, civil engineering and materials engineering, as well as industrial players. Together, they aim to evaluate this technology to meet the challenges of the SPLEEN PEPR and accelerate its industrial transfer.

The project is divided into three main phases:

Modelling and experimental validation: Study of the growth and calcification processes of a coccolithophore (Emiliania huxleyi) and a model cyanobacterium (Synechococcus sp.), including biological and physical phenomena (radiative transfer).

Implementation of bioprocesses: Development of the biocalcification process (cultivation, harvesting, separation) up to TRL 4 (technological maturity level).

Fundamental studies on recovery routes: Analysis of the products formed for applications in civil engineering and materials.

Thanks to this integrated approach, COCCINELLE is laying the foundations for a carbon capture, recovery and biological storage process, paving the way for innovative solutions to reduce greenhouse gas emissions.