Effects of LED lighting on Nannochloropsis oceanica grown in outdoor raceway ponds
Main Author: | |
---|---|
Publication Date: | 2022 |
Other Authors: | , , , , , , , , , , , |
Format: | Article |
Language: | eng |
Source: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Download full: | http://hdl.handle.net/10400.1/18419 |
Summary: | Growth in most microalgal mass cultivation systems is light-limited, particularly in raceway ponds (RWP) where the light path is higher. Artificial lighting can be a promising solution to diminishing dark zones and enhance microalgal productivity. Therefore, our goal was to prevent the cell shift from photosynthesis to a respiration-only stage by resorting to LED illumination. Nannochloropsis oceanica cultures were accordingly grown out-doors in a preliminary small-scaleexperiment, followed by pilot-scale trials. In the former, three 3.0-m(2) RWP were set up under three distinct conditions: 1) without LEDs (control); 2) LEDs turned on during the night; and 3) LEDs turned on for 24 h. In the pilot-scale trial, one of two 28.9-m(2) pilot-scale RWPs was coupled to the best LED setup - determined in the small-scale preliminary experiment - using the same light intensity (normal mode) and half of the intensity (economy mode), with the second RWP serving as a control. In the preliminary experiment, the use of LEDs for 24 h was deemed as not helpful during daytime, before the culture reached asymptotic to 0.5 g DW L-1 - when dark zones appeared during the day due to sunlight attenuation in the 0.1 m-deep cultures. Overall, use of LEDs increased biomass growth chiefly by increasing nighttime productivities - materialized in higher chlorophyll, protein, and carbohydrate productivities in LED-lit cultures. A higher impact of LED lighting was observed under lower sunlight irradiances. A preliminary economic analysis indicates that use of LEDs in RWPs outdoors should be considered for high-value metabolites only. |
id |
RCAP_9cae28ac7bb8b70fa4e9f510db67e63a |
---|---|
oai_identifier_str |
oai:sapientia.ualg.pt:10400.1/18419 |
network_acronym_str |
RCAP |
network_name_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
repository_id_str |
7160 |
spelling |
Effects of LED lighting on Nannochloropsis oceanica grown in outdoor raceway pondsArtificial lightNannochloropsisProductivityRaceway pondCircadian cycleGrowth in most microalgal mass cultivation systems is light-limited, particularly in raceway ponds (RWP) where the light path is higher. Artificial lighting can be a promising solution to diminishing dark zones and enhance microalgal productivity. Therefore, our goal was to prevent the cell shift from photosynthesis to a respiration-only stage by resorting to LED illumination. Nannochloropsis oceanica cultures were accordingly grown out-doors in a preliminary small-scaleexperiment, followed by pilot-scale trials. In the former, three 3.0-m(2) RWP were set up under three distinct conditions: 1) without LEDs (control); 2) LEDs turned on during the night; and 3) LEDs turned on for 24 h. In the pilot-scale trial, one of two 28.9-m(2) pilot-scale RWPs was coupled to the best LED setup - determined in the small-scale preliminary experiment - using the same light intensity (normal mode) and half of the intensity (economy mode), with the second RWP serving as a control. In the preliminary experiment, the use of LEDs for 24 h was deemed as not helpful during daytime, before the culture reached asymptotic to 0.5 g DW L-1 - when dark zones appeared during the day due to sunlight attenuation in the 0.1 m-deep cultures. Overall, use of LEDs increased biomass growth chiefly by increasing nighttime productivities - materialized in higher chlorophyll, protein, and carbohydrate productivities in LED-lit cultures. A higher impact of LED lighting was observed under lower sunlight irradiances. A preliminary economic analysis indicates that use of LEDs in RWPs outdoors should be considered for high-value metabolites only.EMBRC.PT ALG-01-0145-FEDER-022121; LISBOA-01-0247-FEDER-035234; POCI01-0247-FEDER-035234; ALG-010247-FEDER-035234ElsevierSapientiaCarneiro, M.Maia, Inês BeatrizCunha, P.Guerra, I.Magina, T.Santos, TamaraSchulze, Peter S.C.Pereira, H.Malcata, F. X.Navalho, J.Silva, J.Otero, A.Varela, João2022-10-24T13:23:54Z20222022-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10400.1/18419eng2211-926410.1016/j.algal.2022.102685info: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:RCAAP2024-03-06T02:03:35Zoai:sapientia.ualg.pt:10400.1/18419Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T20:08:11.446975Repositório 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 |
Effects of LED lighting on Nannochloropsis oceanica grown in outdoor raceway ponds |
title |
Effects of LED lighting on Nannochloropsis oceanica grown in outdoor raceway ponds |
spellingShingle |
Effects of LED lighting on Nannochloropsis oceanica grown in outdoor raceway ponds Carneiro, M. Artificial light Nannochloropsis Productivity Raceway pond Circadian cycle |
title_short |
Effects of LED lighting on Nannochloropsis oceanica grown in outdoor raceway ponds |
title_full |
Effects of LED lighting on Nannochloropsis oceanica grown in outdoor raceway ponds |
title_fullStr |
Effects of LED lighting on Nannochloropsis oceanica grown in outdoor raceway ponds |
title_full_unstemmed |
Effects of LED lighting on Nannochloropsis oceanica grown in outdoor raceway ponds |
title_sort |
Effects of LED lighting on Nannochloropsis oceanica grown in outdoor raceway ponds |
author |
Carneiro, M. |
author_facet |
Carneiro, M. Maia, Inês Beatriz Cunha, P. Guerra, I. Magina, T. Santos, Tamara Schulze, Peter S.C. Pereira, H. Malcata, F. X. Navalho, J. Silva, J. Otero, A. Varela, João |
author_role |
author |
author2 |
Maia, Inês Beatriz Cunha, P. Guerra, I. Magina, T. Santos, Tamara Schulze, Peter S.C. Pereira, H. Malcata, F. X. Navalho, J. Silva, J. Otero, A. Varela, João |
author2_role |
author author author author author author author author author author author author |
dc.contributor.none.fl_str_mv |
Sapientia |
dc.contributor.author.fl_str_mv |
Carneiro, M. Maia, Inês Beatriz Cunha, P. Guerra, I. Magina, T. Santos, Tamara Schulze, Peter S.C. Pereira, H. Malcata, F. X. Navalho, J. Silva, J. Otero, A. Varela, João |
dc.subject.por.fl_str_mv |
Artificial light Nannochloropsis Productivity Raceway pond Circadian cycle |
topic |
Artificial light Nannochloropsis Productivity Raceway pond Circadian cycle |
description |
Growth in most microalgal mass cultivation systems is light-limited, particularly in raceway ponds (RWP) where the light path is higher. Artificial lighting can be a promising solution to diminishing dark zones and enhance microalgal productivity. Therefore, our goal was to prevent the cell shift from photosynthesis to a respiration-only stage by resorting to LED illumination. Nannochloropsis oceanica cultures were accordingly grown out-doors in a preliminary small-scaleexperiment, followed by pilot-scale trials. In the former, three 3.0-m(2) RWP were set up under three distinct conditions: 1) without LEDs (control); 2) LEDs turned on during the night; and 3) LEDs turned on for 24 h. In the pilot-scale trial, one of two 28.9-m(2) pilot-scale RWPs was coupled to the best LED setup - determined in the small-scale preliminary experiment - using the same light intensity (normal mode) and half of the intensity (economy mode), with the second RWP serving as a control. In the preliminary experiment, the use of LEDs for 24 h was deemed as not helpful during daytime, before the culture reached asymptotic to 0.5 g DW L-1 - when dark zones appeared during the day due to sunlight attenuation in the 0.1 m-deep cultures. Overall, use of LEDs increased biomass growth chiefly by increasing nighttime productivities - materialized in higher chlorophyll, protein, and carbohydrate productivities in LED-lit cultures. A higher impact of LED lighting was observed under lower sunlight irradiances. A preliminary economic analysis indicates that use of LEDs in RWPs outdoors should be considered for high-value metabolites only. |
publishDate |
2022 |
dc.date.none.fl_str_mv |
2022-10-24T13:23:54Z 2022 2022-01-01T00:00:00Z |
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/10400.1/18419 |
url |
http://hdl.handle.net/10400.1/18419 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
2211-9264 10.1016/j.algal.2022.102685 |
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_ |
1799133327390670848 |