Robust industrial Saccharomyces cerevisiae strains for very high gravity bio-ethanol fermentations
Autor(a) principal: | |
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Data de Publicação: | 2011 |
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/1822/16712 |
Resumo: | The application and physiological background of two industrial Saccharomyces cerevisiae strains, isolated from harsh industrial environments, were studied in Very High Gravity (VHG) bio-ethanol fermentations. VHG laboratory fermentations, mimicking industrially relevant conditions, were performed with PE-2 and CA1185 industrial strains and the CEN.PK113-7D laboratory strain. The industrial isolates produced remarkable high ethanol titres (>19%, v/v) and accumulated an increased content of sterols (2 to 5-fold), glycogen (2 to 4-fold) and trehalose (1.1-fold), relatively to laboratory strain. For laboratory and industrial strains, a sharp decrease in the viability and trehalose concentration was observed above 90 g l-1 and 140 g l-1 ethanol, respectively. PE-2 and CA1185 industrial strains presented important physiological differences relatively to CEN.PK113-7D strain and showed to be more prepared to cope with VHG stresses. The identification of a critical ethanol concentration above which viability and trehalose concentration decrease significantly is of great importance to guide VHG process engineering strategies. This study contributes to the improvement of VHG processes by identifying yeast isolates and gathering yeast physiological information during the intensified fermentation process, which, besides elucidating important differences between these industrial and laboratory strains, can drive further process optimization. |
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Robust industrial Saccharomyces cerevisiae strains for very high gravity bio-ethanol fermentationsBio-ethanol productionVery high gravity fermentationSaccharomyces cerevisiaeIndustrial strainsStress toleranceScience & TechnologyThe application and physiological background of two industrial Saccharomyces cerevisiae strains, isolated from harsh industrial environments, were studied in Very High Gravity (VHG) bio-ethanol fermentations. VHG laboratory fermentations, mimicking industrially relevant conditions, were performed with PE-2 and CA1185 industrial strains and the CEN.PK113-7D laboratory strain. The industrial isolates produced remarkable high ethanol titres (>19%, v/v) and accumulated an increased content of sterols (2 to 5-fold), glycogen (2 to 4-fold) and trehalose (1.1-fold), relatively to laboratory strain. For laboratory and industrial strains, a sharp decrease in the viability and trehalose concentration was observed above 90 g l-1 and 140 g l-1 ethanol, respectively. PE-2 and CA1185 industrial strains presented important physiological differences relatively to CEN.PK113-7D strain and showed to be more prepared to cope with VHG stresses. The identification of a critical ethanol concentration above which viability and trehalose concentration decrease significantly is of great importance to guide VHG process engineering strategies. This study contributes to the improvement of VHG processes by identifying yeast isolates and gathering yeast physiological information during the intensified fermentation process, which, besides elucidating important differences between these industrial and laboratory strains, can drive further process optimization.The authors thank Daniel Gomes for performing some of the fermentation samples analyses, COPAM - Companhia Portuguesa de Amidos S.A. (Portugal) for kindly providing the CSL, and Rosane Schwan (Federal University of Lavras, Brazil) for kindly providing the yeast strains PE-2 and CA1185. The financial support of Fundacao para a Ciencia e a Tecnologia (FCT), Portugal, is acknowledged: project ProBioethanol PTDC/BIO/66151/2006, grant SFRH/BD/64776/2009 to F.B. Pereira and grant SFRH/BPD/44328/2008 to P.M.R. Guimaraes.The Society for BiotechnologyUniversidade do MinhoPereira, Francisco B.Guimarães, Pedro M. R.Teixeira, J. A.Domingues, Lucília20112011-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/1822/16712eng1389-172310.1016/j.jbiosc.2011.03.02221543257info: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:RCAAP2023-07-21T12:06:43Zoai:repositorium.sdum.uminho.pt:1822/16712Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T18:57:30.234306Repositório 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 |
Robust industrial Saccharomyces cerevisiae strains for very high gravity bio-ethanol fermentations |
title |
Robust industrial Saccharomyces cerevisiae strains for very high gravity bio-ethanol fermentations |
spellingShingle |
Robust industrial Saccharomyces cerevisiae strains for very high gravity bio-ethanol fermentations Pereira, Francisco B. Bio-ethanol production Very high gravity fermentation Saccharomyces cerevisiae Industrial strains Stress tolerance Science & Technology |
title_short |
Robust industrial Saccharomyces cerevisiae strains for very high gravity bio-ethanol fermentations |
title_full |
Robust industrial Saccharomyces cerevisiae strains for very high gravity bio-ethanol fermentations |
title_fullStr |
Robust industrial Saccharomyces cerevisiae strains for very high gravity bio-ethanol fermentations |
title_full_unstemmed |
Robust industrial Saccharomyces cerevisiae strains for very high gravity bio-ethanol fermentations |
title_sort |
Robust industrial Saccharomyces cerevisiae strains for very high gravity bio-ethanol fermentations |
author |
Pereira, Francisco B. |
author_facet |
Pereira, Francisco B. Guimarães, Pedro M. R. Teixeira, J. A. Domingues, Lucília |
author_role |
author |
author2 |
Guimarães, Pedro M. R. Teixeira, J. A. Domingues, Lucília |
author2_role |
author author author |
dc.contributor.none.fl_str_mv |
Universidade do Minho |
dc.contributor.author.fl_str_mv |
Pereira, Francisco B. Guimarães, Pedro M. R. Teixeira, J. A. Domingues, Lucília |
dc.subject.por.fl_str_mv |
Bio-ethanol production Very high gravity fermentation Saccharomyces cerevisiae Industrial strains Stress tolerance Science & Technology |
topic |
Bio-ethanol production Very high gravity fermentation Saccharomyces cerevisiae Industrial strains Stress tolerance Science & Technology |
description |
The application and physiological background of two industrial Saccharomyces cerevisiae strains, isolated from harsh industrial environments, were studied in Very High Gravity (VHG) bio-ethanol fermentations. VHG laboratory fermentations, mimicking industrially relevant conditions, were performed with PE-2 and CA1185 industrial strains and the CEN.PK113-7D laboratory strain. The industrial isolates produced remarkable high ethanol titres (>19%, v/v) and accumulated an increased content of sterols (2 to 5-fold), glycogen (2 to 4-fold) and trehalose (1.1-fold), relatively to laboratory strain. For laboratory and industrial strains, a sharp decrease in the viability and trehalose concentration was observed above 90 g l-1 and 140 g l-1 ethanol, respectively. PE-2 and CA1185 industrial strains presented important physiological differences relatively to CEN.PK113-7D strain and showed to be more prepared to cope with VHG stresses. The identification of a critical ethanol concentration above which viability and trehalose concentration decrease significantly is of great importance to guide VHG process engineering strategies. This study contributes to the improvement of VHG processes by identifying yeast isolates and gathering yeast physiological information during the intensified fermentation process, which, besides elucidating important differences between these industrial and laboratory strains, can drive further process optimization. |
publishDate |
2011 |
dc.date.none.fl_str_mv |
2011 2011-01-01T00:00:00Z |
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/1822/16712 |
url |
http://hdl.handle.net/1822/16712 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
1389-1723 10.1016/j.jbiosc.2011.03.022 21543257 |
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 |
The Society for Biotechnology |
publisher.none.fl_str_mv |
The Society for Biotechnology |
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 |
instname_str |
Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
instacron_str |
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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1799132363242864640 |