IFrOG

Objectives

The objective of I-FrOG(2023-2027) is to propose an innovative concept of oscillating fractal grid turbulence capable of intensifying mixing and transfers in biological fluids with complex rheology, while imposing the constraints of shear stress and limited degradation. As part of the ecological and energy transition, the development of technologies combining biosequestration and microorganism production offers promising potential for the circular economy in the chemical and pharmaceutical industries.

The effectiveness of these processes depends on the ability of the culture media to capture and mix the components necessary for the growth of microorganisms. Mastering their intensification continues to be a major scientific and technological challenge, since the agitation of the medium is required for the mixture and yet it can potentially damage the bio-fluid; and because the performance of the mixture is dependent on its complex and changing rheology. Oscillating grid systems offer promising potential for overcoming these obstacles given their ability to generate turbulence at a low average shear rate, a capacity that could be further improved by the use of grids with fractal geometries.

This project will, for the first time, provide an experimental characterisation of the flow generated by an oscillating fractal grid out using advanced optical diagnostic techniques for simple or complex fluids modelling the non-Newtonian rheology of bio-fluids. This experimental study will be supplemented by digital modelling components. The applicability of the device as a photobioreactor for microalgae culture will finally be studied, and optimal mixing and intensification agitation strategies will be identified.