Analysis of light regime in continuous light distributions in photobioreactors
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 d...
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Veröffentlicht in: | Bioresource technology 2011-02, Vol.102 (3), p.3138-3148 |
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Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | 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 O2. |
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ISSN: | 0960-8524 1873-2976 |
DOI: | 10.1016/j.biortech.2010.10.088 |