Cuaresma Franco, MaríaJanssen, Marcelvan den End, Evert JanVílchez Lobato, CarlosWijffels, René H.2025-01-292025-01-292011-05-30Cuaresma, M., Janssen. M., van den End, E.J., Vílchez, C., Wijffels, R.H. (2011) Luminostat operation: a tool to maximize microalgae photosynthetic efficiency in photobioreactors during the daily light cycle?. Bioresource Technology 102: 7871–78781873-2976 (electrónico)https://hdl.handle.net/10272/24959The luminostat regime has been proposed as a way to maximize light absorption and thus to increase the microalgae photosynthetic efficiency within photobioreactors. In this study, simulated outdoor light conditions were applied to a lab-scale photobioreactor in order to evaluate the luminostat control under varying light conditions. The photon flux density leaving the reactor (PFDout) was varied from 4 to 20 micromol photons m-2 s-1and the productivity and photosynthetic efficiency of Chlorella sorokiniana were assessed. Maximal volumetric productivity (1.22 g kg-1 d-1) and biomass yield on PAR photons (400–700 nm) absorbed (1.27 g mol-1) were found when PFDout was maintained between 4 and 6 micromol photons m-2 s-1. The resultant photosynthetic efficiency was comparable to that already reported in a chemostat- controlled reactor. A strict luminostat regime could not be maintained under varying light conditions. Further modifications to the luminostat control are required before application under outdoor conditions.engAtribución-NoComercial-SinDerivadas 3.0 Españahttp://creativecommons.org/licenses/by-nc-nd/3.0/es/Photosynthetic efficiencyPhotobioreactor productivityChlorella sorokinianaLuminostatSimulated summer irradiancejournal article10.1016/j.biortech.2011.05.076open access33 Ciencias Tecnológicas3302 Tecnología Bioquímica2302 Bioquímica