Journal
BIORESOURCE TECHNOLOGY
Volume 102, Issue 3, Pages 3138-3148Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2010.10.088
Keywords
Microalgae; Photosynthesis; Light regime; Photobioreactor design
Funding
- Ministerio de Ciencia e Innovacion, Gobierno de Espana [CTQ2008-06741-CO2-01/PPQ]
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Maximum photobioreactor (PBR) efficiency is a must in applications such as the obtention of microalgae-derived fuels. Improving PBR performance requires a better understanding of the light regime, the varying irradiance that microalgal cells moving in a dense culture are exposed to. We propose a definition of light regime that can be used consistently to describe the continuously varying light patterns in PBRs as well as in light/dark cycles. Equivalent continuous and light/dark regimes have been experimentally compared and the results show that continuous variations are not well represented by light/dark cycles, as had been widely accepted. It has been shown that a correct light regime allows obtaining photosynthetic rates higher than the corresponding to continuous light, the so-called flashing light effect and that this is possible in commercial PBRs. A correct PBR operation could result in photosynthetic efficiency close to the optimum eight quanta per O-2. (C) 2010 Elsevier Ltd. All rights reserved.
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