Luminostat operation: A tool to maximize microalgae photosynthetic efficiency in photobioreactors during the daily light cycle?
The 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 contr...
| Autores: | , , , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2011 |
| País: | España |
| Institución: | Universidad de Huelva (UHU) |
| Repositorio: | Arias Montano. Repositorio Institucional de la Universidad de Huelva |
| Idioma: | inglés |
| OAI Identifier: | oai:ariasmontano.uhu.es:10272/24959 |
| Acceso en línea: | https://hdl.handle.net/10272/24959 |
| Access Level: | acceso abierto |
| Palabra clave: | Photosynthetic efficiency Photobioreactor productivity Chlorella sorokiniana Luminostat Simulated summer irradiance 33 Ciencias Tecnológicas 3302 Tecnología Bioquímica 2302 Bioquímica |
| Sumario: | The 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. |
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