Two-stage aeration fermentation strategy to improve bioethanol production by scheffersomyces stipitis
Autor(a) principal: | |
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Data de Publicação: | 2018 |
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/10773/31111 |
Resumo: | Hardwood spent sulfite liquor (HSSL) is a by-product from pulp industry with a high concentration of pentose sugars, besides some hexoses suitable for bioethanol production by Scheffersomyces stipitis. The establishment of optimal aeration process conditions that results in specific microaerophilic conditions required by S. stipitis is the main challenge for ethanol production. The present study aimed to improve the ethanol production from HSSL by S. stipitis through a two-stage aeration fermentation. Experiments with controlled dissolved oxygen tension (DOT) in the first stage and oxygen restriction in the second stage were carried out. The best results were obtained with DOT control at 50% in the first stage, where the increase of oxygen availability provided faster growth and higher biomass yield, and no oxygen supply with an agitation rate of 250 rpm, in the second stage allowed a successful induction of ethanol production. Fermentation using 60% of HSSL (v/v) as substrate for S. stipitis provided a maximum specific growth rate of 0.07 h−1 , an ethanol productivity of 0.04 g L h−1 and an ethanol yield of 0.39 g g−1 , respectively. This work showed a successful two-stage aeration strategy as a promising aeration alternative for bioethanol production from HSSL by S. stipitis. |
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Two-stage aeration fermentation strategy to improve bioethanol production by scheffersomyces stipitisBioethanolHardwood spent sulfite liquorScheffersomyces stipitisTwo-stage aeration strategyDissolved oxygen tensionHardwood spent sulfite liquor (HSSL) is a by-product from pulp industry with a high concentration of pentose sugars, besides some hexoses suitable for bioethanol production by Scheffersomyces stipitis. The establishment of optimal aeration process conditions that results in specific microaerophilic conditions required by S. stipitis is the main challenge for ethanol production. The present study aimed to improve the ethanol production from HSSL by S. stipitis through a two-stage aeration fermentation. Experiments with controlled dissolved oxygen tension (DOT) in the first stage and oxygen restriction in the second stage were carried out. The best results were obtained with DOT control at 50% in the first stage, where the increase of oxygen availability provided faster growth and higher biomass yield, and no oxygen supply with an agitation rate of 250 rpm, in the second stage allowed a successful induction of ethanol production. Fermentation using 60% of HSSL (v/v) as substrate for S. stipitis provided a maximum specific growth rate of 0.07 h−1 , an ethanol productivity of 0.04 g L h−1 and an ethanol yield of 0.39 g g−1 , respectively. This work showed a successful two-stage aeration strategy as a promising aeration alternative for bioethanol production from HSSL by S. stipitis.MDPI2021-04-06T15:30:59Z2018-11-20T00:00:00Z2018-11-20info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10773/31111eng10.3390/fermentation4040097Henriques, Tiago M.Pereira, Susana R.Serafim, Luísa S.Xavier, Ana M. R. B.info: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:RCAAP2024-02-22T12:00:05Zoai:ria.ua.pt:10773/31111Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T03:03:04.460635Repositório 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 |
Two-stage aeration fermentation strategy to improve bioethanol production by scheffersomyces stipitis |
title |
Two-stage aeration fermentation strategy to improve bioethanol production by scheffersomyces stipitis |
spellingShingle |
Two-stage aeration fermentation strategy to improve bioethanol production by scheffersomyces stipitis Henriques, Tiago M. Bioethanol Hardwood spent sulfite liquor Scheffersomyces stipitis Two-stage aeration strategy Dissolved oxygen tension |
title_short |
Two-stage aeration fermentation strategy to improve bioethanol production by scheffersomyces stipitis |
title_full |
Two-stage aeration fermentation strategy to improve bioethanol production by scheffersomyces stipitis |
title_fullStr |
Two-stage aeration fermentation strategy to improve bioethanol production by scheffersomyces stipitis |
title_full_unstemmed |
Two-stage aeration fermentation strategy to improve bioethanol production by scheffersomyces stipitis |
title_sort |
Two-stage aeration fermentation strategy to improve bioethanol production by scheffersomyces stipitis |
author |
Henriques, Tiago M. |
author_facet |
Henriques, Tiago M. Pereira, Susana R. Serafim, Luísa S. Xavier, Ana M. R. B. |
author_role |
author |
author2 |
Pereira, Susana R. Serafim, Luísa S. Xavier, Ana M. R. B. |
author2_role |
author author author |
dc.contributor.author.fl_str_mv |
Henriques, Tiago M. Pereira, Susana R. Serafim, Luísa S. Xavier, Ana M. R. B. |
dc.subject.por.fl_str_mv |
Bioethanol Hardwood spent sulfite liquor Scheffersomyces stipitis Two-stage aeration strategy Dissolved oxygen tension |
topic |
Bioethanol Hardwood spent sulfite liquor Scheffersomyces stipitis Two-stage aeration strategy Dissolved oxygen tension |
description |
Hardwood spent sulfite liquor (HSSL) is a by-product from pulp industry with a high concentration of pentose sugars, besides some hexoses suitable for bioethanol production by Scheffersomyces stipitis. The establishment of optimal aeration process conditions that results in specific microaerophilic conditions required by S. stipitis is the main challenge for ethanol production. The present study aimed to improve the ethanol production from HSSL by S. stipitis through a two-stage aeration fermentation. Experiments with controlled dissolved oxygen tension (DOT) in the first stage and oxygen restriction in the second stage were carried out. The best results were obtained with DOT control at 50% in the first stage, where the increase of oxygen availability provided faster growth and higher biomass yield, and no oxygen supply with an agitation rate of 250 rpm, in the second stage allowed a successful induction of ethanol production. Fermentation using 60% of HSSL (v/v) as substrate for S. stipitis provided a maximum specific growth rate of 0.07 h−1 , an ethanol productivity of 0.04 g L h−1 and an ethanol yield of 0.39 g g−1 , respectively. This work showed a successful two-stage aeration strategy as a promising aeration alternative for bioethanol production from HSSL by S. stipitis. |
publishDate |
2018 |
dc.date.none.fl_str_mv |
2018-11-20T00:00:00Z 2018-11-20 2021-04-06T15:30:59Z |
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/10773/31111 |
url |
http://hdl.handle.net/10773/31111 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.3390/fermentation4040097 |
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 |
MDPI |
publisher.none.fl_str_mv |
MDPI |
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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1799137686323200000 |