Efeito do ácido acético sobre o crescimento e fermentação da levedura Meyerozyma guilliermondii
Autor(a) principal: | |
---|---|
Data de Publicação: | 2016 |
Tipo de documento: | Dissertação |
Idioma: | por |
Título da fonte: | Repositório Institucional da UFSCAR |
Texto Completo: | https://repositorio.ufscar.br/handle/ufscar/8390 |
Resumo: | The viability of technologies that make possible to use all available plant biomass, such as the production of lignocellulosic ethanol, faces challenges as the search for microorganisms capable of fermenting pentoses with high tolerance to inhibitors released in the biomass hydrolysis step, such as acetic acid and furfural. This study aimed to evaluate the metabolizing capacity of pentoses and glucose by a yeast strain of Meyerozyma guilliermondii (CCT7783) in the presence of furfural and acetic acid. The first set of experiments comprised the evaluation of cell growth in a synthetic medium containing acetic acid as the sole carbon source at concentrations of 1.5; 2.5; 4.5; 10.5; 13.5; 16.5 and 19.5 g/L at 30°C, 160 rpm, pH 5.5, with initial concentration of 0.2 g/L of dry mass for a period of 96 hours of incubation. It was also evaluated the effect of pH (3.5 and 5.5) and the initial concentration of dry mass (0.2, 0.5 and 2.5 g/L). The second set of experiments consisted in the evaluation of the effect of furfural (20 and 40 mg/L) and acetic acid (5 and 10 g/L) in the fermentation of pentoses (arabinose and xylose) and glucose, biomass and ethanol production. The yeast M. guilliermondii was able to grow in synthetic medium in all the acetic acid concentrations tested, at pH 5.5. The concentrations of acetic acid evaluated were much higher than those commonly found in hemicellulosic hydrolysates. Growth inhibition occurred in concentrations of acetic acid beyond 10.5 g/L. The initial pH and the initial cell concentration influenced the growth and the acetic acid consumption. In synthetic medium containing glucose, pentoses and acetic acid as carbon sources, the highest specific growth rate was obtained in the treatment with the addition of 5 g/L of acetic acid, which was consumed concomitantly with the pentoses and glucose in all treatments, however the acetic acid was an inhibitor at the concentration of 10 g/L. Furfural inhibited the growth of the yeast in the concentration of 40 mg/L. The ethanol production by M. guilliermondii was lower comparing to the micro-organisms commonly utilized in the fermentation process. The yeast was able to grow and promote the biological detoxification even in the presence of the inhibitors like acetic acid and furfural, showing that the process requires optimization and that the yeast M. guilliermondii may be applied in biotechnological routes for the production of second generation ethanol. |
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Perna, Michelle dos Santos CordeiroCeccato-Antonini, Sandra Reginahttp://lattes.cnpq.br/7600793543184032baf5f31d-0ca8-4ac2-90c1-360e243a8c492017-01-13T19:42:10Z2017-01-13T19:42:10Z2016-08-26PERNA, Michelle dos Santos Cordeiro. Efeito do ácido acético sobre o crescimento e fermentação da levedura Meyerozyma guilliermondii. 2016. Dissertação (Mestrado em Produção Vegetal e Bioprocessos Associados) – Universidade Federal de São Carlos, Araras, 2016. Disponível em: https://repositorio.ufscar.br/handle/ufscar/8390.https://repositorio.ufscar.br/handle/ufscar/8390The viability of technologies that make possible to use all available plant biomass, such as the production of lignocellulosic ethanol, faces challenges as the search for microorganisms capable of fermenting pentoses with high tolerance to inhibitors released in the biomass hydrolysis step, such as acetic acid and furfural. This study aimed to evaluate the metabolizing capacity of pentoses and glucose by a yeast strain of Meyerozyma guilliermondii (CCT7783) in the presence of furfural and acetic acid. The first set of experiments comprised the evaluation of cell growth in a synthetic medium containing acetic acid as the sole carbon source at concentrations of 1.5; 2.5; 4.5; 10.5; 13.5; 16.5 and 19.5 g/L at 30°C, 160 rpm, pH 5.5, with initial concentration of 0.2 g/L of dry mass for a period of 96 hours of incubation. It was also evaluated the effect of pH (3.5 and 5.5) and the initial concentration of dry mass (0.2, 0.5 and 2.5 g/L). The second set of experiments consisted in the evaluation of the effect of furfural (20 and 40 mg/L) and acetic acid (5 and 10 g/L) in the fermentation of pentoses (arabinose and xylose) and glucose, biomass and ethanol production. The yeast M. guilliermondii was able to grow in synthetic medium in all the acetic acid concentrations tested, at pH 5.5. The concentrations of acetic acid evaluated were much higher than those commonly found in hemicellulosic hydrolysates. Growth inhibition occurred in concentrations of acetic acid beyond 10.5 g/L. The initial pH and the initial cell concentration influenced the growth and the acetic acid consumption. In synthetic medium containing glucose, pentoses and acetic acid as carbon sources, the highest specific growth rate was obtained in the treatment with the addition of 5 g/L of acetic acid, which was consumed concomitantly with the pentoses and glucose in all treatments, however the acetic acid was an inhibitor at the concentration of 10 g/L. Furfural inhibited the growth of the yeast in the concentration of 40 mg/L. The ethanol production by M. guilliermondii was lower comparing to the micro-organisms commonly utilized in the fermentation process. The yeast was able to grow and promote the biological detoxification even in the presence of the inhibitors like acetic acid and furfural, showing that the process requires optimization and that the yeast M. guilliermondii may be applied in biotechnological routes for the production of second generation ethanol.A viabilidade de tecnologias que aproveitem ao máximo toda a biomassa vegetal disponível, como a produção de etanol lignocelulósico, enfrenta desafios como a busca por micro-organismos capazes de fermentar pentoses, com alta tolerância aos inibidores liberados na etapa de hidrólise da biomassa, como o ácido acético e o furfural. O presente trabalho objetivou avaliar a capacidade de metabolização de pentoses e glicose por uma linhagem da levedura Meyerozyma guilliermondii (CCT7783), na presença de furfural e ácido acético. A primeira fase experimental consistiu da avaliação do crescimento celular em meio sintético contendo ácido acético como única fonte de carbono nas concentrações de 1,5; 2,5; 4,5; 10,5; 13,5; 16,5 e 19,5 g/L, a 30ºC, 160 rpm, pH 5,5, com concentração inicial de 0,2 g/L de massa seca durante um período de incubação de 96 h. Avaliou-se ainda nesta etapa a influência do pH (3,5 e 5,5) e concentração inicial de massa seca (0,2; 0,5 e 2,5 g/L). A segunda fase consistiu na avaliação do efeito do furfural (20 e 40 mg/L) e ácido acético (5 e 10 g/L) na fermentação de pentoses (arabinose e xilose) e glicose, produção de biomassa e etanol. A levedura M. guilliermondii foi capaz de crescer em meio sintético em todas as concentrações de ácido acético testadas, em pH 5,5, sendo essas concentrações muito acima daquelas normalmente encontradas em hidrolisados hemicelulósicos. A concentração a partir da qual ocorreu inibição do crescimento foi 10,5 g/L. O pH inicial teve influência no consumo do ácido acético e crescimento assim como a concentração celular inicial. Em meio sintético contendo glicose, pentoses e ácido acético como fontes de carbono, a maior velocidade específica de crescimento foi obtida no tratamento com adição de 5 g/L de ácido acético, o qual foi consumido concomitantemente com as pentoses e glicose em todos os tratamentos, porém o ácido acético atuou como inibidor na concentração de 10 g/L. O furfural inibiu o crescimento da levedura na concentração de 40 mg/L. A produção de etanol (g/L) foi baixa em relação aos micro-organismos comumente aplicados no processo de fermentação, porém a levedura foi capaz de crescer e promover a detoxificação biológica mesmo na presença de inibidores como ácido acético e furfural, denotando que o processo requer otimização e que a levedura M. guilliermondii pode ser aplicada em rotas biotecnológicas de produção de etanol de segunda geração.Não recebi financiamentoporUniversidade Federal de São CarlosCâmpus ArarasPrograma de Pós-Graduação em Produção Vegetal e Bioprocessos Associados - PPGPVBA-ArUFSCarFermentaçãoLevedurasÁcido acéticoMeyerozyma guilliermondiiEtanolCIENCIAS AGRARIASEfeito do ácido acético sobre o crescimento e fermentação da levedura Meyerozyma guilliermondiiEffect of the acetic acid on the growth and fermentation of the yeast Meyerozyma guilliermondiiinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisOnline600600a50ec035-f628-483b-8af0-31d0c9756f2ainfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFSCARinstname:Universidade Federal de São Carlos (UFSCAR)instacron:UFSCARORIGINALDissMSCP.pdfDissMSCP.pdfapplication/pdf2238237https://repositorio.ufscar.br/bitstream/ufscar/8390/1/DissMSCP.pdf45491802360ff30f68b05e329839935bMD51LICENSElicense.txtlicense.txttext/plain; charset=utf-81957https://repositorio.ufscar.br/bitstream/ufscar/8390/2/license.txtae0398b6f8b235e40ad82cba6c50031dMD52TEXTDissMSCP.pdf.txtDissMSCP.pdf.txtExtracted texttext/plain154849https://repositorio.ufscar.br/bitstream/ufscar/8390/3/DissMSCP.pdf.txtdea1e5fdccc2390bfe85089fc4bb6581MD53THUMBNAILDissMSCP.pdf.jpgDissMSCP.pdf.jpgIM Thumbnailimage/jpeg7234https://repositorio.ufscar.br/bitstream/ufscar/8390/4/DissMSCP.pdf.jpg678cc1ad74de1b9ca6b9436d61f53749MD54ufscar/83902024-02-15 18:15:32.714oai:repositorio.ufscar.br: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Repositório InstitucionalPUBhttps://repositorio.ufscar.br/oai/requestopendoar:43222024-02-15T18:15:32Repositório Institucional da UFSCAR - Universidade Federal de São Carlos (UFSCAR)false |
dc.title.por.fl_str_mv |
Efeito do ácido acético sobre o crescimento e fermentação da levedura Meyerozyma guilliermondii |
dc.title.alternative.eng.fl_str_mv |
Effect of the acetic acid on the growth and fermentation of the yeast Meyerozyma guilliermondii |
title |
Efeito do ácido acético sobre o crescimento e fermentação da levedura Meyerozyma guilliermondii |
spellingShingle |
Efeito do ácido acético sobre o crescimento e fermentação da levedura Meyerozyma guilliermondii Perna, Michelle dos Santos Cordeiro Fermentação Leveduras Ácido acético Meyerozyma guilliermondii Etanol CIENCIAS AGRARIAS |
title_short |
Efeito do ácido acético sobre o crescimento e fermentação da levedura Meyerozyma guilliermondii |
title_full |
Efeito do ácido acético sobre o crescimento e fermentação da levedura Meyerozyma guilliermondii |
title_fullStr |
Efeito do ácido acético sobre o crescimento e fermentação da levedura Meyerozyma guilliermondii |
title_full_unstemmed |
Efeito do ácido acético sobre o crescimento e fermentação da levedura Meyerozyma guilliermondii |
title_sort |
Efeito do ácido acético sobre o crescimento e fermentação da levedura Meyerozyma guilliermondii |
author |
Perna, Michelle dos Santos Cordeiro |
author_facet |
Perna, Michelle dos Santos Cordeiro |
author_role |
author |
dc.contributor.author.fl_str_mv |
Perna, Michelle dos Santos Cordeiro |
dc.contributor.advisor1.fl_str_mv |
Ceccato-Antonini, Sandra Regina |
dc.contributor.advisor1Lattes.fl_str_mv |
http://lattes.cnpq.br/7600793543184032 |
dc.contributor.authorID.fl_str_mv |
baf5f31d-0ca8-4ac2-90c1-360e243a8c49 |
contributor_str_mv |
Ceccato-Antonini, Sandra Regina |
dc.subject.por.fl_str_mv |
Fermentação Leveduras Ácido acético Meyerozyma guilliermondii Etanol |
topic |
Fermentação Leveduras Ácido acético Meyerozyma guilliermondii Etanol CIENCIAS AGRARIAS |
dc.subject.cnpq.fl_str_mv |
CIENCIAS AGRARIAS |
description |
The viability of technologies that make possible to use all available plant biomass, such as the production of lignocellulosic ethanol, faces challenges as the search for microorganisms capable of fermenting pentoses with high tolerance to inhibitors released in the biomass hydrolysis step, such as acetic acid and furfural. This study aimed to evaluate the metabolizing capacity of pentoses and glucose by a yeast strain of Meyerozyma guilliermondii (CCT7783) in the presence of furfural and acetic acid. The first set of experiments comprised the evaluation of cell growth in a synthetic medium containing acetic acid as the sole carbon source at concentrations of 1.5; 2.5; 4.5; 10.5; 13.5; 16.5 and 19.5 g/L at 30°C, 160 rpm, pH 5.5, with initial concentration of 0.2 g/L of dry mass for a period of 96 hours of incubation. It was also evaluated the effect of pH (3.5 and 5.5) and the initial concentration of dry mass (0.2, 0.5 and 2.5 g/L). The second set of experiments consisted in the evaluation of the effect of furfural (20 and 40 mg/L) and acetic acid (5 and 10 g/L) in the fermentation of pentoses (arabinose and xylose) and glucose, biomass and ethanol production. The yeast M. guilliermondii was able to grow in synthetic medium in all the acetic acid concentrations tested, at pH 5.5. The concentrations of acetic acid evaluated were much higher than those commonly found in hemicellulosic hydrolysates. Growth inhibition occurred in concentrations of acetic acid beyond 10.5 g/L. The initial pH and the initial cell concentration influenced the growth and the acetic acid consumption. In synthetic medium containing glucose, pentoses and acetic acid as carbon sources, the highest specific growth rate was obtained in the treatment with the addition of 5 g/L of acetic acid, which was consumed concomitantly with the pentoses and glucose in all treatments, however the acetic acid was an inhibitor at the concentration of 10 g/L. Furfural inhibited the growth of the yeast in the concentration of 40 mg/L. The ethanol production by M. guilliermondii was lower comparing to the micro-organisms commonly utilized in the fermentation process. The yeast was able to grow and promote the biological detoxification even in the presence of the inhibitors like acetic acid and furfural, showing that the process requires optimization and that the yeast M. guilliermondii may be applied in biotechnological routes for the production of second generation ethanol. |
publishDate |
2016 |
dc.date.issued.fl_str_mv |
2016-08-26 |
dc.date.accessioned.fl_str_mv |
2017-01-13T19:42:10Z |
dc.date.available.fl_str_mv |
2017-01-13T19:42:10Z |
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info:eu-repo/semantics/publishedVersion |
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info:eu-repo/semantics/masterThesis |
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masterThesis |
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dc.identifier.citation.fl_str_mv |
PERNA, Michelle dos Santos Cordeiro. Efeito do ácido acético sobre o crescimento e fermentação da levedura Meyerozyma guilliermondii. 2016. Dissertação (Mestrado em Produção Vegetal e Bioprocessos Associados) – Universidade Federal de São Carlos, Araras, 2016. Disponível em: https://repositorio.ufscar.br/handle/ufscar/8390. |
dc.identifier.uri.fl_str_mv |
https://repositorio.ufscar.br/handle/ufscar/8390 |
identifier_str_mv |
PERNA, Michelle dos Santos Cordeiro. Efeito do ácido acético sobre o crescimento e fermentação da levedura Meyerozyma guilliermondii. 2016. Dissertação (Mestrado em Produção Vegetal e Bioprocessos Associados) – Universidade Federal de São Carlos, Araras, 2016. Disponível em: https://repositorio.ufscar.br/handle/ufscar/8390. |
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https://repositorio.ufscar.br/handle/ufscar/8390 |
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Universidade Federal de São Carlos Câmpus Araras |
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Programa de Pós-Graduação em Produção Vegetal e Bioprocessos Associados - PPGPVBA-Ar |
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UFSCar |
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Universidade Federal de São Carlos Câmpus Araras |
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