On to the impact of low cost substrates for BNC production
Autor(a) principal: | |
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Data de Publicação: | 2019 |
Outros Autores: | , , , , , |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/1822/61752 |
Resumo: | Bacterial nanocellulose (BNC) is an exopolysaccharide produced by certain acetic acid bacteria. It has high crystallinity, high mechanical strength, high purity and high water-holding capacity. These properties make it useful in making artificial skin (1), electronic paper, composite reinforcement, development of food and cosmetic applications (2). The cost of fermentation media is believed to contribute significantly to the operational costs, especially if synthetic commercial media are used. Hence, much research on BNC production using low-cost substrates has been done focusing on lowering the production costs (3). Also, to meet the requirement for industrial applications, effective large-scale BNC production systems need to be developed, which involves improving the fermentation conditions and identifying high yield BNC-producing strains (4). However, as with many fermentation systems, while promoting the recycling of low value-added products, the use of complex substrates may in fact represent a bottleneck in the BNC fermentation processes. Some of these substrates present, comparatively to synthetic nutrients, high chemical oxygen demand (COD), total and volatile solids (TS and VS), total nitrogen (TN), antimicrobial components (such as phenols) Consequently, these alternative substrates may place an economic problem either downhill, due to the need for wastewaters treatments and/or, uphill, due to the need of substrates pre-treatment. In this work, the optimization of alternative BNC culture medium (Molasses-Corn Steep Liquor, MOL-CSL), using Response surface methodology central composite design was used to evaluate the effect of inexpensive and widely available nutrients sources, namely MOL, ethanol (EtOH), CSL and ammonium sulphate on BNC production yield under static culture by komagataeibacter xylinus BPR 2001. The optimized parameters for maximum BNC production were: % (m/v): MOL 5.38, CSL 1.91, ammonium sulphate 0.63, disodium phosphate 0.270, citric acid 0.115 and ethanol 1.38 % (v/v). The maximum BNC production yield were 7.5 ± 0.54 g/L versus 1.79 ± 0.04 g/L for MOL-CSL and synthetic medium (HS-EtOH) culture medium, respectively. The resulting wastewater from each culture medium was characterized regarding COD, TN, TS and VS, leading to the conclusion that the wastewaters generated using MOL-CSL are more heavily charged with organic matter, increasing the final costs of BNC production due to the higher costs associated to wastewater treatment. Anaerobic digestion (AD) was studied for wastewater treatment and biogas production from the wastewaters of the BNC fermentation and purification process. Finally, a preliminary Life Cycle Assessment of BNC production was performed and will be presented. |
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On to the impact of low cost substrates for BNC productionEngenharia e Tecnologia::Biotecnologia IndustrialBacterial nanocellulose (BNC) is an exopolysaccharide produced by certain acetic acid bacteria. It has high crystallinity, high mechanical strength, high purity and high water-holding capacity. These properties make it useful in making artificial skin (1), electronic paper, composite reinforcement, development of food and cosmetic applications (2). The cost of fermentation media is believed to contribute significantly to the operational costs, especially if synthetic commercial media are used. Hence, much research on BNC production using low-cost substrates has been done focusing on lowering the production costs (3). Also, to meet the requirement for industrial applications, effective large-scale BNC production systems need to be developed, which involves improving the fermentation conditions and identifying high yield BNC-producing strains (4). However, as with many fermentation systems, while promoting the recycling of low value-added products, the use of complex substrates may in fact represent a bottleneck in the BNC fermentation processes. Some of these substrates present, comparatively to synthetic nutrients, high chemical oxygen demand (COD), total and volatile solids (TS and VS), total nitrogen (TN), antimicrobial components (such as phenols) Consequently, these alternative substrates may place an economic problem either downhill, due to the need for wastewaters treatments and/or, uphill, due to the need of substrates pre-treatment. In this work, the optimization of alternative BNC culture medium (Molasses-Corn Steep Liquor, MOL-CSL), using Response surface methodology central composite design was used to evaluate the effect of inexpensive and widely available nutrients sources, namely MOL, ethanol (EtOH), CSL and ammonium sulphate on BNC production yield under static culture by komagataeibacter xylinus BPR 2001. The optimized parameters for maximum BNC production were: % (m/v): MOL 5.38, CSL 1.91, ammonium sulphate 0.63, disodium phosphate 0.270, citric acid 0.115 and ethanol 1.38 % (v/v). The maximum BNC production yield were 7.5 ± 0.54 g/L versus 1.79 ± 0.04 g/L for MOL-CSL and synthetic medium (HS-EtOH) culture medium, respectively. The resulting wastewater from each culture medium was characterized regarding COD, TN, TS and VS, leading to the conclusion that the wastewaters generated using MOL-CSL are more heavily charged with organic matter, increasing the final costs of BNC production due to the higher costs associated to wastewater treatment. Anaerobic digestion (AD) was studied for wastewater treatment and biogas production from the wastewaters of the BNC fermentation and purification process. Finally, a preliminary Life Cycle Assessment of BNC production was performed and will be presented.info:eu-repo/semantics/publishedVersionUniversidade do MinhoRodrigues, Ana CristinaSoares da Silva, F. A. G.Oliveira, João V.Forte, AnaDourado, FernandoAlves, M. M.Gama, F. M.2019-10-032019-10-03T00:00:00Zconference objectinfo:eu-repo/semantics/publishedVersionapplication/pdfapplication/pdfhttp://hdl.handle.net/1822/61752engRodrigues, Ana Cristina; Soares da Silva, F. A. G.; Oliveira, João V.; Forte, Ana; Dourado, Fernando; Alves, M. Madalena; Gama, F. M., On to the impact of low cost substrates for BNC production. ISBNC 2019 - 4th International Symposium on Bacterial Nanocellulose. Porto, Portugal, Oct 3-4, 2019.http://www.4isbnc.com/Book%20of%20Abstracts_4ISBNC.pdfinfo: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:RCAAP2024-05-11T06:10:52Zoai:repositorium.sdum.uminho.pt:1822/61752Portal AgregadorONGhttps://www.rcaap.pt/oai/openairemluisa.alvim@gmail.comopendoar:71602024-05-11T06:10:52Repositório 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 |
On to the impact of low cost substrates for BNC production |
title |
On to the impact of low cost substrates for BNC production |
spellingShingle |
On to the impact of low cost substrates for BNC production Rodrigues, Ana Cristina Engenharia e Tecnologia::Biotecnologia Industrial |
title_short |
On to the impact of low cost substrates for BNC production |
title_full |
On to the impact of low cost substrates for BNC production |
title_fullStr |
On to the impact of low cost substrates for BNC production |
title_full_unstemmed |
On to the impact of low cost substrates for BNC production |
title_sort |
On to the impact of low cost substrates for BNC production |
author |
Rodrigues, Ana Cristina |
author_facet |
Rodrigues, Ana Cristina Soares da Silva, F. A. G. Oliveira, João V. Forte, Ana Dourado, Fernando Alves, M. M. Gama, F. M. |
author_role |
author |
author2 |
Soares da Silva, F. A. G. Oliveira, João V. Forte, Ana Dourado, Fernando Alves, M. M. Gama, F. M. |
author2_role |
author author author author author author |
dc.contributor.none.fl_str_mv |
Universidade do Minho |
dc.contributor.author.fl_str_mv |
Rodrigues, Ana Cristina Soares da Silva, F. A. G. Oliveira, João V. Forte, Ana Dourado, Fernando Alves, M. M. Gama, F. M. |
dc.subject.por.fl_str_mv |
Engenharia e Tecnologia::Biotecnologia Industrial |
topic |
Engenharia e Tecnologia::Biotecnologia Industrial |
description |
Bacterial nanocellulose (BNC) is an exopolysaccharide produced by certain acetic acid bacteria. It has high crystallinity, high mechanical strength, high purity and high water-holding capacity. These properties make it useful in making artificial skin (1), electronic paper, composite reinforcement, development of food and cosmetic applications (2). The cost of fermentation media is believed to contribute significantly to the operational costs, especially if synthetic commercial media are used. Hence, much research on BNC production using low-cost substrates has been done focusing on lowering the production costs (3). Also, to meet the requirement for industrial applications, effective large-scale BNC production systems need to be developed, which involves improving the fermentation conditions and identifying high yield BNC-producing strains (4). However, as with many fermentation systems, while promoting the recycling of low value-added products, the use of complex substrates may in fact represent a bottleneck in the BNC fermentation processes. Some of these substrates present, comparatively to synthetic nutrients, high chemical oxygen demand (COD), total and volatile solids (TS and VS), total nitrogen (TN), antimicrobial components (such as phenols) Consequently, these alternative substrates may place an economic problem either downhill, due to the need for wastewaters treatments and/or, uphill, due to the need of substrates pre-treatment. In this work, the optimization of alternative BNC culture medium (Molasses-Corn Steep Liquor, MOL-CSL), using Response surface methodology central composite design was used to evaluate the effect of inexpensive and widely available nutrients sources, namely MOL, ethanol (EtOH), CSL and ammonium sulphate on BNC production yield under static culture by komagataeibacter xylinus BPR 2001. The optimized parameters for maximum BNC production were: % (m/v): MOL 5.38, CSL 1.91, ammonium sulphate 0.63, disodium phosphate 0.270, citric acid 0.115 and ethanol 1.38 % (v/v). The maximum BNC production yield were 7.5 ± 0.54 g/L versus 1.79 ± 0.04 g/L for MOL-CSL and synthetic medium (HS-EtOH) culture medium, respectively. The resulting wastewater from each culture medium was characterized regarding COD, TN, TS and VS, leading to the conclusion that the wastewaters generated using MOL-CSL are more heavily charged with organic matter, increasing the final costs of BNC production due to the higher costs associated to wastewater treatment. Anaerobic digestion (AD) was studied for wastewater treatment and biogas production from the wastewaters of the BNC fermentation and purification process. Finally, a preliminary Life Cycle Assessment of BNC production was performed and will be presented. |
publishDate |
2019 |
dc.date.none.fl_str_mv |
2019-10-03 2019-10-03T00:00:00Z |
dc.type.driver.fl_str_mv |
conference object |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/1822/61752 |
url |
http://hdl.handle.net/1822/61752 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Rodrigues, Ana Cristina; Soares da Silva, F. A. G.; Oliveira, João V.; Forte, Ana; Dourado, Fernando; Alves, M. Madalena; Gama, F. M., On to the impact of low cost substrates for BNC production. ISBNC 2019 - 4th International Symposium on Bacterial Nanocellulose. Porto, Portugal, Oct 3-4, 2019. http://www.4isbnc.com/Book%20of%20Abstracts_4ISBNC.pdf |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf application/pdf |
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 |
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RCAAP |
institution |
RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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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 |
mluisa.alvim@gmail.com |
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1817544879901769728 |