Carbon dioxide biofixation by Chlorella vulgaris at different CO2 concentrations and light intensities

• Tipo: Artigo em Revista Científica Internacional
• Data: 2014

Autores

Clement Larosiere, B (Autor) Outra; Lopes, F (Autor) Outra; Ana Gonçalves (Autor) Outra; Taidi, B (Autor) Outra; Benedetti, M (Autor) Outra; Minier, M (Autor) Outra; Pareau, D (Autor) Outra

Revista

Título: Engineering in Life Sciences

Vol. 14

Páginas: 509-519

ISSN: 1618-0240

Editora: Wiley-Blackwell

Indexação

ISI Web of Knowledge - 4 Citações

Scopus - 5 Citações

Outras Informações

ID Authenticus: P-00M-N5G

DOI: 10.1002/elsc.201200212

Abstract (EN): In order to develop an effective CO2 mitigation process using microalgae for potential industrial application, the growth and physiological activity of Chlorella vulgaris in photobioreactor cultures were studied. C. vulgaris was grown at two CO2 concentrations (2 and 13% of CO2 v/v) and at three incident light intensities (50, 120 and 180 mol m(-2) s(-1)) for 9 days. The measured specific growth rate was similar under all conditions tested but an increase in light intensity and CO2 concentration affected the biomass and cell concentrations. Although carbon limitation was observed at 2% CO2, similar cellular composition was measured in both conditions. Light limitation induced a net change in the growth behavior of C. vulgaris. Nitrogen limitation seemed to decrease the nitrogen quota of the cells and rise the intracellular carbon:nitrogen ratio. Exopolysaccharide production per cell appeared to be affected by light intensity. In order to avoid underestimation of the CO2 biofixation rate of the microalgae, exopolysaccharide production was taken into account. The maximum CO2 removal rate (0.98 g CO2 L-1 d(-1)) and the highest biomass concentration (4.14 g DW L-1) were determined at 13% (v/v) CO2 and 180 mol m(-2) s(-1). Our results show that C. vulgaris has a real potential for industrial CO2 remediation.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 11