Effect of Light Intensity on the Growth of Three Microalgae in Laboratory Batch Cultures
28th European Biomass Conference and Exhibition (e-EUBCE 2020): Proceedings 2020
Baiba Ieviņa, Francesco Romagnoli

Microalgae are regarded as promising feedstock for bioenergy production due to their fast growth rate, high productivity and low nutritional requirements. However, large-scale biomass production for bioenergy currently is not economically viable due to low productivity and high cultivation costs of microalgal biomass. Optimal growing conditions for specific strains must be set up to increase the microalgae productivity. Therefore, in present study we focus on finding the optimal light intensity conditions for three microalgae cultivation intended for large-scale biomass production in outdoor raceway ponds supplemented with artificial LED illumination. We tested light intensity in a range of 30 to 200 μmol m-2 s-1. The impact of light intensity on the growth and biomass production of three microalgae strains was assessed by measurements of optical density and dry cell weight. Our study shows that light intensity of 30 and 50 μmol m-2 s-1 is too low to maintain high growth rate of microalgae strains studied. Our results suggest that C. vulgaris has lower light requirements comparing to C. sorokiniana and C. reinhardtii. The highest biomass yield was achieved at light intensity of 150 μmol m-2 s-1 for C. vulgaris and at 200 μmol m-2 s-1 for C. sorokiniana and C. reinhardtii.


Atslēgas vārdi
Bioenergy; Biomass; Light intensity; Microalgae
DOI
10.5071/28thEUBCE2020-1DV.1.26
Hipersaite
http://www.etaflorence.it/proceedings/?detail=18104

Ieviņa, B., Romagnoli, F. Effect of Light Intensity on the Growth of Three Microalgae in Laboratory Batch Cultures. No: 28th European Biomass Conference and Exhibition (e-EUBCE 2020): Proceedings, Latvija, Online, 6.-9. jūlijs, 2020. Florence: TA-Florence Renewable Energies, 2020, 169.-174.lpp. ISBN 978-88-89407-20-2. ISSN 2282-5819. Pieejams: doi:10.5071/28thEUBCE2020-1DV.1.26

Publikācijas valoda
English (en)
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