Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.14/6736
Título: Optimization of ω-3 fatty acid production by microalgae: Crossover effects of CO2 and light intensity under batch and continuous cultivation modes
Autor: Carvalho, Ana P.
Malcata, F. Xavier
Palavras-chave: Photobioreactor
Docosahexaenoic acid
Eicosapentaenoic acideicosapentaenoic acid
Polyunsaturated fatty acids
Data: Jun-2005
Editora: Springer
Citação: "Marine Biotechnology" . ISSN 1436-2228. 7:4 (2005) 381-388
Resumo: The microalga Pavlova lutheri is a potential source of economically valuable docosahexaenoic and eicosapentaenoic acids. Specific chemical and physical culture conditions may enhance their biochemical synthesis. There are studies relating the effect of CO2 on growth; however, this parameter should not be assessed independently, as its effect strongly depends on the light intensity available. In this research, the combined effects of light intensity and CO2 content on growth and fatty acid profile in P. lutheri were ascertained, in order to optimize polyunsaturated fatty acid production. The influence of the operation mode was also tested via growing the cultures by batch and by continuous cultivation. Higher light intensities associated with lower dilution rates promoted increases in both cell population and weight per cell. Increased levels of CO2 favored the total lipid content, but decreased the amounts of polyunsaturated fatty acids. Mass productivities of eicosapentaenoic acid (3.61 ± 0.04 mg . L⁻¹ . d⁻¹) and docosahexaenoic acid (1.29 ± 0.01 mg . L⁻¹. d⁻¹) were obtained in cultures supplied with 0.5% (v/v) CO2, at a dilution rate of 0.297 d)1 and a light intensity of 120 µE . m-2 . s-1.
Peer review: yes
URI: http://hdl.handle.net/10400.14/6736
Versão do Editor: The original publication is available at www.springerlink.com
Aparece nas colecções:ESB - Artigos em revistas internacionais com Arbitragem / Papers in international journals with Peer-review

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