Abstract: The present invention concerns a module for a photobioreactor suitable for being assembled to an identical adjacent module, comprising: —a panel having a first face and a second face, opposite the first face, the first face delimiting, with the second face of the adjacent panel, a cavity suitable for containing a culture medium when the modules are assembled, the cavity (14) having a thickness of between 1 millimetre and 2 centimetres, and —a gas injection device, capable of injecting gas bubbles into the culture medium contained in the cavity, such that the bubbles rise along the faces of the panels.

Abstract: The invention relates to a sunlight-guiding module (2) for a photobioreactor (1) comprising a reaction chamber (11), the module (2) comprising: —a concentrating device (21) placed outside the reaction chamber (11) in order to concentrate the sunlight into a concentrated beam; —a scattering device (24) placed in the reaction chamber (11); characterised in that the module (2) also comprises a homogenising device (22) placed between the concentrating device (21) and the scattering device (24) in order to make the concentrated beam homogeneous before the concentrated beam enters the scattering device (24). The invention also relates to a light-guiding panel (3) comprising at least two light-guiding modules (2). Finally, the invention relates to a photoreactor (1) comprising a reaction chamber (11), characterised in that it also comprises a light-guiding module (2) or panel (3).