Effects of light intensity and dilution rate on the semicontinuous cultivation of Arthrospira (Spirulina) platensis. A kinetic Monod-type approach

Autor(es)

Bezerra, Raquel Pedrosa ^{[1, 2]} ; Ortiz Montoya, Erika Yuliana ^{[1, 2]} ; Sato, Sunao ^[2] ; Perego, Patrizia ^[1] ; Monteiro de Carvalho, Joao Carlos ^[2] ; Converti, Attilio ^[1]

Afiliação do(s) autor(es)

^[1] Univ Genoa, Dept Chem & Proc Engn GB Bonino, I-16145 Genoa - Italy

^[2] Univ Sao Paulo, Dept Biochem & Pharmaceut Technol, Fac Pharmaceut Sci, BR-05508900 Sao Paulo - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Bioresource Technology; v. 102, n. 3, p. 3215-3219, FEB 2011.
• Citações Web of Science: 20

Resumo

Semicontinuous cultures were carried out at different dilution rates (D) and light intensities (I) to determine the maximum productivity of Arthrospira platensis cultivated in helicoidal photobioreactor up to the achievement of pseudo-steady-state conditions. At I = 108 mu mol photons m(-2) s(-1), the semicontinuous regime ensured the highest values of maximum cell concentration (X(m) = 5772 +/- 113 mg L(-1)) and productivity (P(XS) = 1319 +/- 25 mg L(-1) d(-1)) at the lowest (D = 0.1 day(-1)) and the highest (D = 0.3 day(-1)) dilution rates, respectively. A kinetic model derived from that of Monod was proposed to determine the relationship between the product of light intensity to dilution rate (ID) and the cell productivity, which were shown to exert a combined influence on this parameter. This result put into evidence that pseudosteady-state conditions could be modified according to circumstances, conveniently varying one or other of the two independent variables. (C) 2010 Elsevier Ltd. All rights reserved. (AU)

• Processo FAPESP: 06/54959-3 - Cultivo descontinuo alimentado de spirulina platensis (arthrospira) em reator tubular utilizando ureia como fonte de nitrogenio e co2 puro ou proveniente de fermentacao alcoolica.
• Beneficiário: Raquel Pedrosa Bezerra
• Modalidade de apoio: Bolsas no Brasil - Doutorado