Increase of ethanol productivity in an airlift reactor with a modified draught tube
Autor(a) principal: | |
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Data de Publicação: | 1999 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | https://hdl.handle.net/1822/1592 |
Resumo: | Static mixers were introduced in the draught tube of a three-phase, concentric tube type airlift bioreactor, resulting in a 30% increase in ethanol productivity during glucose fermentation with a highly flocculent strain of Saccharomyces cerevisiae. Increased productivity was obtained as a consequence of the floc size reduction provoked by the new design of the draught tube and of the smaller applied aeration rates, allowing a higher dilution rate to be used. Steady state data at different dilution rates were measured for both systems and the results were compared in terms of specific consumption / production rates and ethanol productivity. An approach based on heterogeneous catalysis principles was used in order to consider the presence of porous yeast flocs. Total glucose conversion was achieved at a dilution rate of 0.34 hˉ¹. The smaller floc size contributed to the higher observed reaction rates by reducing diffusional limitations inside the flocs. The respiratory quotient had a constant value (around 23) at all dilution rates, meaning that the metabolic state of the cells in the flocs remained constant, having a strong fermentative metabolism. |
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Increase of ethanol productivity in an airlift reactor with a modified draught tubeEthanol productivityAirliftFermentationYeast flocsStatic mixersYeast floesScience & TechnologyStatic mixers were introduced in the draught tube of a three-phase, concentric tube type airlift bioreactor, resulting in a 30% increase in ethanol productivity during glucose fermentation with a highly flocculent strain of Saccharomyces cerevisiae. Increased productivity was obtained as a consequence of the floc size reduction provoked by the new design of the draught tube and of the smaller applied aeration rates, allowing a higher dilution rate to be used. Steady state data at different dilution rates were measured for both systems and the results were compared in terms of specific consumption / production rates and ethanol productivity. An approach based on heterogeneous catalysis principles was used in order to consider the presence of porous yeast flocs. Total glucose conversion was achieved at a dilution rate of 0.34 hˉ¹. The smaller floc size contributed to the higher observed reaction rates by reducing diffusional limitations inside the flocs. The respiratory quotient had a constant value (around 23) at all dilution rates, meaning that the metabolic state of the cells in the flocs remained constant, having a strong fermentative metabolism.Junta Nacional de Investigação Científica e Tecnológica (JNICT); Instituto de Biotecnologia e Química Fina (IBQF).Wiley-BlackwellUniversidade do MinhoVicente, A. A.Dluhý, M.Teixeira, J. A.1999-061999-06-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/1822/1592engVicente, A.A., Dluhý, M. and Teixeira, J.A. (1999), Increase of ethanol productivity in an airlift reactor with a modified draught tube. Can. J. Chem. Eng., 77: 497-502. https://doi.org/10.1002/cjce.54507703090008-403410.1002/cjce.5450770309info: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:RCAAP2023-07-21T12:51:07Zoai:repositorium.sdum.uminho.pt:1822/1592Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T19:49:57.455642Repositório 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 |
Increase of ethanol productivity in an airlift reactor with a modified draught tube |
title |
Increase of ethanol productivity in an airlift reactor with a modified draught tube |
spellingShingle |
Increase of ethanol productivity in an airlift reactor with a modified draught tube Vicente, A. A. Ethanol productivity Airlift Fermentation Yeast flocs Static mixers Yeast floes Science & Technology |
title_short |
Increase of ethanol productivity in an airlift reactor with a modified draught tube |
title_full |
Increase of ethanol productivity in an airlift reactor with a modified draught tube |
title_fullStr |
Increase of ethanol productivity in an airlift reactor with a modified draught tube |
title_full_unstemmed |
Increase of ethanol productivity in an airlift reactor with a modified draught tube |
title_sort |
Increase of ethanol productivity in an airlift reactor with a modified draught tube |
author |
Vicente, A. A. |
author_facet |
Vicente, A. A. Dluhý, M. Teixeira, J. A. |
author_role |
author |
author2 |
Dluhý, M. Teixeira, J. A. |
author2_role |
author author |
dc.contributor.none.fl_str_mv |
Universidade do Minho |
dc.contributor.author.fl_str_mv |
Vicente, A. A. Dluhý, M. Teixeira, J. A. |
dc.subject.por.fl_str_mv |
Ethanol productivity Airlift Fermentation Yeast flocs Static mixers Yeast floes Science & Technology |
topic |
Ethanol productivity Airlift Fermentation Yeast flocs Static mixers Yeast floes Science & Technology |
description |
Static mixers were introduced in the draught tube of a three-phase, concentric tube type airlift bioreactor, resulting in a 30% increase in ethanol productivity during glucose fermentation with a highly flocculent strain of Saccharomyces cerevisiae. Increased productivity was obtained as a consequence of the floc size reduction provoked by the new design of the draught tube and of the smaller applied aeration rates, allowing a higher dilution rate to be used. Steady state data at different dilution rates were measured for both systems and the results were compared in terms of specific consumption / production rates and ethanol productivity. An approach based on heterogeneous catalysis principles was used in order to consider the presence of porous yeast flocs. Total glucose conversion was achieved at a dilution rate of 0.34 hˉ¹. The smaller floc size contributed to the higher observed reaction rates by reducing diffusional limitations inside the flocs. The respiratory quotient had a constant value (around 23) at all dilution rates, meaning that the metabolic state of the cells in the flocs remained constant, having a strong fermentative metabolism. |
publishDate |
1999 |
dc.date.none.fl_str_mv |
1999-06 1999-06-01T00:00:00Z |
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 |
https://hdl.handle.net/1822/1592 |
url |
https://hdl.handle.net/1822/1592 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Vicente, A.A., Dluhý, M. and Teixeira, J.A. (1999), Increase of ethanol productivity in an airlift reactor with a modified draught tube. Can. J. Chem. Eng., 77: 497-502. https://doi.org/10.1002/cjce.5450770309 0008-4034 10.1002/cjce.5450770309 |
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 |
Wiley-Blackwell |
publisher.none.fl_str_mv |
Wiley-Blackwell |
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 |
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RCAAP |
institution |
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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1799133083013742592 |