Cécile FORMOSA-DAGUE

Cécile FORMOSA-DAGUE

Chargée de Recherches du CNRS, HDR

Equipe TIM

Actual position and research subject

Since 2019 in TBI, my work focuses on developing efficient and sustainable ways to harvest microalgae using flocculation/flotation technique. This technique first consists in a flocculation step where cells are aggregated into large flocs that can then be easily captured by rising microbubbles. Microbubbles bring the flocs to the suspension’s surface, allowing their easy separation from water. In this context, I use atomic force microscopy (AFM) techniques to understand the molecular mechanisms underlying microalgae flocculation. In addition, recent developments using FluidFM technology, that combines AFM with microfluidics, have allowed to take the next step and probe the interactions directly between microbubbles and cells. Understanding these interactions between cells or between cells and bubbles paves the way for the development of cost-effective harvesting processes that will help in making microalgae-based biofuel production economically viable on an industrial scale. In addition to this, I also participate in projects where I bring my expertise in AFM techniques to study relevant interactions for example between bacteria and filtration membranes used for water treatment, or to characterize materials.

Education and Diploma

Others

  • Supervised or co-supervised: 6 PhD students (4 are on-going), 1 post-doc and 12 master students
  • Bronze medal of the CNRS 2022
  • Elected member of the administrative council of the French Society for Microscopy (SFµ, secretary for Life Sciences)
  • Member of the scientific animation committee of the research federation Fermat

List of selected publications

Passucci V, Thomas-Chemin O, Dib O, Assaf AA, Durand MJ, Dague E, Areco MM, Formosa-Dague C (2024) Investigating the role of extracellular polymeric substances produced by Parachlorella kessleri in Zn(II) bioremediation using atomic force microscopy, Environmental Pollution, 363, 125082, https://doi.org/10.1016/j.envpol.2024.125082

Burato Rosales A, Durban-Benizio N, Nguyen XL, Bouvier V, Lamo C, Demir-Yilmaz I, Causserand C, Formosa-Dague C†, Coetsier C† (2023) Minimizing bacterial adhesion on membrane: Multiscale characterization of surface modifications, J Membrane Sci, 684, 121867, https://doi.org/10.1016/j.memsci.2023.121867

Demir-Yilmaz I, Ftouhi MS, Balayssac S, Guiraud P, Coudret C, Formosa-Dague C† (2023) Bubble functionalization in flotation process improve microalgae harvesting, Chem Eng J, 452, 139349, https://doi.org/10.1016/j.cej.2022.139349

Demir-Yilmaz I, Yakovenko N, Roux C, Guiraud P, Collin F, Coudret C, Ter Halle A, Formosa-Dague C† (2022) The role of microplastics in microalgae cells aggregation: a study at the molecular scale using atomic force microscopy, Sci Total Environ, 832, 155036,

http://dx.doi.org/10.1016/j.scitotenv.2022.155036

Demir-Yilmaz I, Guiraud P, Formosa-Dague C† (2021) The contribution of Atomic Force Microscopy (AFM) in microalgae studies: a review, Algal Res, 60:102506,

https://doi.org/10.1016/j.algal.2021.102506

Demir I, Lüchtefeld I, Lemen C, Dague E, Guiraud P, Zambelli T, Formosa-Dague C† (2021) Probing the interactions between air bubbles and (bio)-interfaces at the molecular scale using FluidFM technology, J Colloid Interface Sci, 604:785-797,

https://doi.org/10.1016/j.jcis.2021.07.036

Demir I, Blockx J, Dague E, Guiraud P, Thielemans W, Muylaert K, Formosa-Dague C† (2020) Nanoscale evidences unravel microalgae flocculation mechanism induced by chitosan, ACS Appl Bio Mater, 3(12):8446-8459, https://doi.org/10.1021/acsabm.0c00772

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