Optimization of ω-3 fatty acid production by microalgae: Crossover effects of CO2 and light intensity under batch and continuous cultivation modes

Detalhes bibliográficos
Autor(a) principal: Carvalho, Ana P.
Data de Publicação: 2005
Outros Autores: Malcata, F. Xavier
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10400.14/6736
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.
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spelling Optimization of ω-3 fatty acid production by microalgae: Crossover effects of CO2 and light intensity under batch and continuous cultivation modesPhotobioreactorDocosahexaenoic acidEicosapentaenoic acideicosapentaenoic acidPolyunsaturated fatty acidsThe 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.SpringerVeritati - Repositório Institucional da Universidade Católica PortuguesaCarvalho, Ana P.Malcata, F. Xavier2011-10-21T16:21:13Z2005-062005-06-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10400.14/6736eng"Marine Biotechnology" . ISSN 1436-2228. 7:4 (2005) 381-388info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-07-12T17:09:26Zoai:repositorio.ucp.pt:10400.14/6736Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T18:05:04.256255Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse
dc.title.none.fl_str_mv Optimization of ω-3 fatty acid production by microalgae: Crossover effects of CO2 and light intensity under batch and continuous cultivation modes
title Optimization of ω-3 fatty acid production by microalgae: Crossover effects of CO2 and light intensity under batch and continuous cultivation modes
spellingShingle Optimization of ω-3 fatty acid production by microalgae: Crossover effects of CO2 and light intensity under batch and continuous cultivation modes
Carvalho, Ana P.
Photobioreactor
Docosahexaenoic acid
Eicosapentaenoic acideicosapentaenoic acid
Polyunsaturated fatty acids
title_short Optimization of ω-3 fatty acid production by microalgae: Crossover effects of CO2 and light intensity under batch and continuous cultivation modes
title_full Optimization of ω-3 fatty acid production by microalgae: Crossover effects of CO2 and light intensity under batch and continuous cultivation modes
title_fullStr Optimization of ω-3 fatty acid production by microalgae: Crossover effects of CO2 and light intensity under batch and continuous cultivation modes
title_full_unstemmed Optimization of ω-3 fatty acid production by microalgae: Crossover effects of CO2 and light intensity under batch and continuous cultivation modes
title_sort Optimization of ω-3 fatty acid production by microalgae: Crossover effects of CO2 and light intensity under batch and continuous cultivation modes
author Carvalho, Ana P.
author_facet Carvalho, Ana P.
Malcata, F. Xavier
author_role author
author2 Malcata, F. Xavier
author2_role author
dc.contributor.none.fl_str_mv Veritati - Repositório Institucional da Universidade Católica Portuguesa
dc.contributor.author.fl_str_mv Carvalho, Ana P.
Malcata, F. Xavier
dc.subject.por.fl_str_mv Photobioreactor
Docosahexaenoic acid
Eicosapentaenoic acideicosapentaenoic acid
Polyunsaturated fatty acids
topic Photobioreactor
Docosahexaenoic acid
Eicosapentaenoic acideicosapentaenoic acid
Polyunsaturated fatty acids
description 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.
publishDate 2005
dc.date.none.fl_str_mv 2005-06
2005-06-01T00:00:00Z
2011-10-21T16:21:13Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
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dc.identifier.uri.fl_str_mv http://hdl.handle.net/10400.14/6736
url http://hdl.handle.net/10400.14/6736
dc.language.iso.fl_str_mv eng
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dc.relation.none.fl_str_mv "Marine Biotechnology" . ISSN 1436-2228. 7:4 (2005) 381-388
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dc.publisher.none.fl_str_mv Springer
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