Light regime characterization in an airlift photobioreactor for production of microalgae with high starch content
Autor(a) principal: | |
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Data de Publicação: | 2010 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/1822/11311 |
Resumo: | The slow development of microalgal biotechnology is due to the failure in the design of large-scale photobioreactors (PBRs) where light energy is efficiently utilized. In this work, both the quality and the amount of light reaching a given point of the PBR were determined and correlated with cell density, light path length, and PBR geometry. This was made for two different geometries of the downcomer of an airlift PBR using optical fiber technology that allows to obtain information about quantitative and qualitative aspects of light patterns. This is important since the ability of microalgae to use the energy of photons is different, depending on the wavelength of the radiation. The results show that the circular geometry allows a more efficient light penetration, especially in the locations with a higher radial coordinate (r) when compared to the plane geometry; these observations were confirmed by the occurrence of a higher fraction of illuminated volume of the PBR for this geometry. An equation is proposed to correlate the relative light intensity with the penetration distance for both geometries and different microalgae cell concentrations. It was shown that the attenuation of light intensity is dependent on its wavelength, cell concentration, geometry of PBR, and the penetration distance of light. |
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Light regime characterization in an airlift photobioreactor for production of microalgae with high starch contentMicroalgaeOptical fiberIncident light spectrumLight absorptionAirlift photobioreactorScience & TechnologyThe slow development of microalgal biotechnology is due to the failure in the design of large-scale photobioreactors (PBRs) where light energy is efficiently utilized. In this work, both the quality and the amount of light reaching a given point of the PBR were determined and correlated with cell density, light path length, and PBR geometry. This was made for two different geometries of the downcomer of an airlift PBR using optical fiber technology that allows to obtain information about quantitative and qualitative aspects of light patterns. This is important since the ability of microalgae to use the energy of photons is different, depending on the wavelength of the radiation. The results show that the circular geometry allows a more efficient light penetration, especially in the locations with a higher radial coordinate (r) when compared to the plane geometry; these observations were confirmed by the occurrence of a higher fraction of illuminated volume of the PBR for this geometry. An equation is proposed to correlate the relative light intensity with the penetration distance for both geometries and different microalgae cell concentrations. It was shown that the attenuation of light intensity is dependent on its wavelength, cell concentration, geometry of PBR, and the penetration distance of light.Fundação para a Ciência e a Tecnologia (FCT)Springer Science+Business MediaUniversidade do MinhoFernandes, Bruno DanielDragone, GiulianoTeixeira, J. A.Vicente, A. A.2010-052010-05-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/1822/11311eng"Applied Biochemistry and Biotechnology - part A". ISSN 0273-2289. 161:1-8 (May 2010) 218-226.0273-228910.1007/s12010-009-8783-920221863info: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:RCAAP2023-07-21T12:02:59Zoai:repositorium.sdum.uminho.pt:1822/11311Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T18:53:03.220357Repositório 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 |
Light regime characterization in an airlift photobioreactor for production of microalgae with high starch content |
title |
Light regime characterization in an airlift photobioreactor for production of microalgae with high starch content |
spellingShingle |
Light regime characterization in an airlift photobioreactor for production of microalgae with high starch content Fernandes, Bruno Daniel Microalgae Optical fiber Incident light spectrum Light absorption Airlift photobioreactor Science & Technology |
title_short |
Light regime characterization in an airlift photobioreactor for production of microalgae with high starch content |
title_full |
Light regime characterization in an airlift photobioreactor for production of microalgae with high starch content |
title_fullStr |
Light regime characterization in an airlift photobioreactor for production of microalgae with high starch content |
title_full_unstemmed |
Light regime characterization in an airlift photobioreactor for production of microalgae with high starch content |
title_sort |
Light regime characterization in an airlift photobioreactor for production of microalgae with high starch content |
author |
Fernandes, Bruno Daniel |
author_facet |
Fernandes, Bruno Daniel Dragone, Giuliano Teixeira, J. A. Vicente, A. A. |
author_role |
author |
author2 |
Dragone, Giuliano Teixeira, J. A. Vicente, A. A. |
author2_role |
author author author |
dc.contributor.none.fl_str_mv |
Universidade do Minho |
dc.contributor.author.fl_str_mv |
Fernandes, Bruno Daniel Dragone, Giuliano Teixeira, J. A. Vicente, A. A. |
dc.subject.por.fl_str_mv |
Microalgae Optical fiber Incident light spectrum Light absorption Airlift photobioreactor Science & Technology |
topic |
Microalgae Optical fiber Incident light spectrum Light absorption Airlift photobioreactor Science & Technology |
description |
The slow development of microalgal biotechnology is due to the failure in the design of large-scale photobioreactors (PBRs) where light energy is efficiently utilized. In this work, both the quality and the amount of light reaching a given point of the PBR were determined and correlated with cell density, light path length, and PBR geometry. This was made for two different geometries of the downcomer of an airlift PBR using optical fiber technology that allows to obtain information about quantitative and qualitative aspects of light patterns. This is important since the ability of microalgae to use the energy of photons is different, depending on the wavelength of the radiation. The results show that the circular geometry allows a more efficient light penetration, especially in the locations with a higher radial coordinate (r) when compared to the plane geometry; these observations were confirmed by the occurrence of a higher fraction of illuminated volume of the PBR for this geometry. An equation is proposed to correlate the relative light intensity with the penetration distance for both geometries and different microalgae cell concentrations. It was shown that the attenuation of light intensity is dependent on its wavelength, cell concentration, geometry of PBR, and the penetration distance of light. |
publishDate |
2010 |
dc.date.none.fl_str_mv |
2010-05 2010-05-01T00:00:00Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/1822/11311 |
url |
http://hdl.handle.net/1822/11311 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
"Applied Biochemistry and Biotechnology - part A". ISSN 0273-2289. 161:1-8 (May 2010) 218-226. 0273-2289 10.1007/s12010-009-8783-9 20221863 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Springer Science+Business Media |
publisher.none.fl_str_mv |
Springer Science+Business Media |
dc.source.none.fl_str_mv |
reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
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Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
instacron_str |
RCAAP |
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RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
collection |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
repository.name.fl_str_mv |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
repository.mail.fl_str_mv |
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1799132308251344896 |