Nannochloropsis gaditana grown outdoors in annular photobioreactors: operation strategies

Detalhes bibliográficos
Autor(a) principal: Nogueira, Natacha
Data de Publicação: 2020
Outros Autores: Nascimento, Francisco J.A., Cunha, César, Cordeiro, Nereida
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10400.13/3297
Resumo: Microalgae are a topic of intense research due to their potential applications in bio-based economy. However, sustainable commercial production is still overpriced due to high cultivation costs, harvesting and dewatering processes. In the present study, trials were conducted with the aim to improve daily operation strategies related to microalgae harvesting processes that did not compromise biomass productivity or the biochemical composition of the cultivated microalgae. Two experimental trials were performed in outdoor tubular annular photobioreactors to evaluate the effects of harvesting and medium dilution time (sunrise vs sunset) on Nannochloropsis gaditana biomass productivity, lipid and fatty acid content. Results showed that harvesting time had no significant effect on cell concentration and biomass productivity. Harvesting and medium dilution time did not affect lipid content. However, lipid content in samples collected at sunset was significantly higher than in samples collected at sunrise for both experimental treatments. The fatty acids profiles were mainly composed by polyunsaturated fatty acids, followed by mono-unsaturated fatty acids and saturated fatty acids. Regardless of medium dilution time, harvesting at sunset indicated that lipidic production (higher polyunsaturated fatty acids and lower saturated fatty acids) was favored without affecting the biomass productivity. The current study showed harvesting in the afternoon is a viable option for large production units that use semi-continuous strategy, without compromising biomass cell and lipid productivity.
id RCAP_62318e92938c4e0cbb2979c62bdcfb60
oai_identifier_str oai:digituma.uma.pt:10400.13/3297
network_acronym_str RCAP
network_name_str Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
repository_id_str 7160
spelling Nannochloropsis gaditana grown outdoors in annular photobioreactors: operation strategiesNannochloropsis gaditanaOutdoor productionHarvest and dilution timeLipid contentFatty acid profile.Faculdade de Ciências Exatas e da EngenhariaMicroalgae are a topic of intense research due to their potential applications in bio-based economy. However, sustainable commercial production is still overpriced due to high cultivation costs, harvesting and dewatering processes. In the present study, trials were conducted with the aim to improve daily operation strategies related to microalgae harvesting processes that did not compromise biomass productivity or the biochemical composition of the cultivated microalgae. Two experimental trials were performed in outdoor tubular annular photobioreactors to evaluate the effects of harvesting and medium dilution time (sunrise vs sunset) on Nannochloropsis gaditana biomass productivity, lipid and fatty acid content. Results showed that harvesting time had no significant effect on cell concentration and biomass productivity. Harvesting and medium dilution time did not affect lipid content. However, lipid content in samples collected at sunset was significantly higher than in samples collected at sunrise for both experimental treatments. The fatty acids profiles were mainly composed by polyunsaturated fatty acids, followed by mono-unsaturated fatty acids and saturated fatty acids. Regardless of medium dilution time, harvesting at sunset indicated that lipidic production (higher polyunsaturated fatty acids and lower saturated fatty acids) was favored without affecting the biomass productivity. The current study showed harvesting in the afternoon is a viable option for large production units that use semi-continuous strategy, without compromising biomass cell and lipid productivity.ElsevierDigitUMaNogueira, NatachaNascimento, Francisco J.A.Cunha, CésarCordeiro, Nereida2021-04-15T20:24:09Z2020-01-01T00:00:00Z2020-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10400.13/3297engNogueira, N., Nascimento, F. J., Cunha, C., & Cordeiro, N. (2020). Nannochloropsis gaditana grown outdoors in annular photobioreactors: operation strategies. Algal Research, 48, 101913.10.1016/j.algal.2020.101913info: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:RCAAP2022-09-05T12:56:14Zoai:digituma.uma.pt:10400.13/3297Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T15:06:19.368159Repositório 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 Nannochloropsis gaditana grown outdoors in annular photobioreactors: operation strategies
title Nannochloropsis gaditana grown outdoors in annular photobioreactors: operation strategies
spellingShingle Nannochloropsis gaditana grown outdoors in annular photobioreactors: operation strategies
Nogueira, Natacha
Nannochloropsis gaditana
Outdoor production
Harvest and dilution time
Lipid content
Fatty acid profile
.
Faculdade de Ciências Exatas e da Engenharia
title_short Nannochloropsis gaditana grown outdoors in annular photobioreactors: operation strategies
title_full Nannochloropsis gaditana grown outdoors in annular photobioreactors: operation strategies
title_fullStr Nannochloropsis gaditana grown outdoors in annular photobioreactors: operation strategies
title_full_unstemmed Nannochloropsis gaditana grown outdoors in annular photobioreactors: operation strategies
title_sort Nannochloropsis gaditana grown outdoors in annular photobioreactors: operation strategies
author Nogueira, Natacha
author_facet Nogueira, Natacha
Nascimento, Francisco J.A.
Cunha, César
Cordeiro, Nereida
author_role author
author2 Nascimento, Francisco J.A.
Cunha, César
Cordeiro, Nereida
author2_role author
author
author
dc.contributor.none.fl_str_mv DigitUMa
dc.contributor.author.fl_str_mv Nogueira, Natacha
Nascimento, Francisco J.A.
Cunha, César
Cordeiro, Nereida
dc.subject.por.fl_str_mv Nannochloropsis gaditana
Outdoor production
Harvest and dilution time
Lipid content
Fatty acid profile
.
Faculdade de Ciências Exatas e da Engenharia
topic Nannochloropsis gaditana
Outdoor production
Harvest and dilution time
Lipid content
Fatty acid profile
.
Faculdade de Ciências Exatas e da Engenharia
description Microalgae are a topic of intense research due to their potential applications in bio-based economy. However, sustainable commercial production is still overpriced due to high cultivation costs, harvesting and dewatering processes. In the present study, trials were conducted with the aim to improve daily operation strategies related to microalgae harvesting processes that did not compromise biomass productivity or the biochemical composition of the cultivated microalgae. Two experimental trials were performed in outdoor tubular annular photobioreactors to evaluate the effects of harvesting and medium dilution time (sunrise vs sunset) on Nannochloropsis gaditana biomass productivity, lipid and fatty acid content. Results showed that harvesting time had no significant effect on cell concentration and biomass productivity. Harvesting and medium dilution time did not affect lipid content. However, lipid content in samples collected at sunset was significantly higher than in samples collected at sunrise for both experimental treatments. The fatty acids profiles were mainly composed by polyunsaturated fatty acids, followed by mono-unsaturated fatty acids and saturated fatty acids. Regardless of medium dilution time, harvesting at sunset indicated that lipidic production (higher polyunsaturated fatty acids and lower saturated fatty acids) was favored without affecting the biomass productivity. The current study showed harvesting in the afternoon is a viable option for large production units that use semi-continuous strategy, without compromising biomass cell and lipid productivity.
publishDate 2020
dc.date.none.fl_str_mv 2020-01-01T00:00:00Z
2020-01-01T00:00:00Z
2021-04-15T20:24:09Z
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/10400.13/3297
url http://hdl.handle.net/10400.13/3297
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Nogueira, N., Nascimento, F. J., Cunha, C., & Cordeiro, N. (2020). Nannochloropsis gaditana grown outdoors in annular photobioreactors: operation strategies. Algal Research, 48, 101913.
10.1016/j.algal.2020.101913
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 Elsevier
publisher.none.fl_str_mv Elsevier
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
_version_ 1799129934429421568