The bioenergetics and thermodynamics of the batch culture of Arthrospira (Spirulina) platensis was investigated at different light intensity conditions (40, 70 and 100 μmol m-2 s-1) in horizontal photobioreactor (HoP). The results indicate that the increase in biomass yield on Gibbs energy (YGX) was favored by a progressive increase in light intensity up to 100 μmol m-2 s-1, reaching a maximum cell concentration of about 8.6 g/L. An increase in light intensity favored cell growth because of photolimitation in the tested range, and the YGX fall was observed after 6.5 and 7.5 days at 40 and 70 μmol m-2 s-1, respectively, whereas no fall was detected at 108 μmol m-2 s-1 even after 8.5 days. A progressive increase in the light intensity did not exert any appreciable influence on number of moles of photons for the growth of 1 C-mol of biomass up to 6.5 days. These results demonstrate that light intensity was the growth-limiting factor under the selected conditions - See more at: https://proceedings.galoa.com.br/cobeq/cobeq-2016/trabalhos/effect-of-light-intensity-in-the-bioenergetics-and-thermodynamics-of-batch-arthrospira-spirulina#sthash.uBHApsG4.dpuf

Effect of light intensity on the bioenergetics and thermodynamics of batch Arthrospira (Spirulina) platensis culture

PEREGO, PATRIZIA;CONVERTI, ATTILIO;
2016-01-01

Abstract

The bioenergetics and thermodynamics of the batch culture of Arthrospira (Spirulina) platensis was investigated at different light intensity conditions (40, 70 and 100 μmol m-2 s-1) in horizontal photobioreactor (HoP). The results indicate that the increase in biomass yield on Gibbs energy (YGX) was favored by a progressive increase in light intensity up to 100 μmol m-2 s-1, reaching a maximum cell concentration of about 8.6 g/L. An increase in light intensity favored cell growth because of photolimitation in the tested range, and the YGX fall was observed after 6.5 and 7.5 days at 40 and 70 μmol m-2 s-1, respectively, whereas no fall was detected at 108 μmol m-2 s-1 even after 8.5 days. A progressive increase in the light intensity did not exert any appreciable influence on number of moles of photons for the growth of 1 C-mol of biomass up to 6.5 days. These results demonstrate that light intensity was the growth-limiting factor under the selected conditions - See more at: https://proceedings.galoa.com.br/cobeq/cobeq-2016/trabalhos/effect-of-light-intensity-in-the-bioenergetics-and-thermodynamics-of-batch-arthrospira-spirulina#sthash.uBHApsG4.dpuf
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11567/856897
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