Abstract
This study proposes a new design of the internally radiatingphotobioreactor, which combines the advantages of an air-lift bioreactorand an internally radiating system, and an efficient way of supplying lightenergy into the photobioreactor during cell cultivation. For a modelphotosynthetic microorganism, Synechococcus PCC 6301 wascultivated in an internally radiating air-lift photobioreactor. The lightcondition inside the photobioreactor was characterized by the average lightintensity which was calculated from the light distribution model. Sinceexcessive light energy induced photoinhibition at the early growth stage, thestrategy of lumostatic operation was developed in order to maintain thelight condition at an appropriate level during cell cultivation. Based on thecalculation results of the light distribution model, the average light intensitywas regulated at 30, 60, or 90 μmol m-2 s-1 byincreasing the number of light radiators. The model-based control ofirradiating level enabled us to harvest a larger amount of cells withoutshowing the photoinhibited growth. Other favorable results included thereduction of cultivation time and lower consumption of irradiating power.
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Suh, I.S., Lee, S.B. Cultivation of a cyanobacterium in an internally radiating air-lift photobioreactor. Journal of Applied Phycology 13, 381–388 (2001). https://doi.org/10.1023/A:1017979431852
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DOI: https://doi.org/10.1023/A:1017979431852