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A novel bench-scale photobioreactor for continuous cultivation of microalgae [Poster]

2023-06Conference object Open access
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dc.contributor.authorSilva, Tiago
dc.contributor.authorTavares, João
dc.contributor.authorPaixão, Susana M.
dc.contributor.authorAlves, Luís
dc.date.accessioned2024-01-15T17:03:32Z
dc.date.available2024-01-15T17:03:32Z
dc.date.issued2023-06
dc.description.abstractABSTRACT: There are different types of carbon intensive industries. While some operate with daily intervals, others must be maintained in continuous operation, sometimes for weeks or months. Processes that depend on microbiological activity are usually of the second category, resulting in the continuous production of CO2 during extensive periods of time. In order to help mitigate climate change, alternative methods of carbon capture into added-value products have been the focus of research. Autotrophic microalgae cultures can be employed to sequester the carbon present in these streams, generating new products, while increasing process sustainability. However, to sequester these emissions microalgal bioreactors must also function under continuous constant conditions, requiring photobioreactors (PBRs) that can act as chemostats for long periods of time. Moreover, there is currently a lack of studies and design alternatives using microalgal chemostats. Most works tend to focus on batch assays or semi-continuous processes, presenting different responses depending on the growth stage of the culture, or the time of day. The present work is centred on the development of a novel continuous bench-scale PBR. This system uses an innovative recirculation concept to combine three different units (retention vessel, photocollector and degasser) that operate as a single autotrophic chemostat, allowing the study of carbon sequestration from a biogenic CO2-rich constant air stream. The novel PBR was tested by cultivating the microalga Haematococcus pluvialis at different dilution rates (0.1-0.5 d-1), while using as sole carbon source an air stream containing ≈0.35 vol% of CO2 (produced by a coupled heterotrophic bacterial chemostat). The results obtained revealed that the system could operate as a chemostat, allowing the production of stable cultures with proportional responses to the changes in dilution rates for more than 3 months, reaching a maximum biomass productivity of 183 mg/L/d, with a carbon fixation efficiency of ≈39% at 0.3 d-1. This makes the PBR prototype a promising tool to study/optimise integrated heterotrophic and autotrophic continuous processes, or constant sequestration of stable CO2-rich streams, making it easier to gather data for future scale-up.pt_PT
dc.description.versionN/Apt_PT
dc.identifier.citationSilva, Tiago... et.al - A novel bench-scale photobioreactor for continuous cultivation of microalgae. In: Abstract Book of 19th International Conference on Renewable Resources & Biorefineries (RRB’2023), 31 May – 2 June, Riga, Latvia, p. 105-106. (Poster 79)pt_PT
dc.identifier.urihttp://hdl.handle.net/10400.9/4216
dc.language.isoengpt_PT
dc.peerreviewednopt_PT
dc.relationLow-emissions system towards green fuels and high added-value bioactive compounds production based on Gordonia alkanivorans strain 1B biorefinery
dc.relationZero emissions system for fossil fuel desulfurization using Gordonia alkanivorans strain 1B
dc.relation.publisherversionhttps://rrbconference.compt_PT
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt_PT
dc.subjectMicroalgaept_PT
dc.subjectHaematococcus pluvialispt_PT
dc.subjectContinuous culturept_PT
dc.subjectBiogenic CO2pt_PT
dc.subjectCO2 sequestrationpt_PT
dc.subjectChemostatpt_PT
dc.titleA novel bench-scale photobioreactor for continuous cultivation of microalgae [Poster]pt_PT
dc.typeconference object
dspace.entity.typePublication
oaire.awardTitleLow-emissions system towards green fuels and high added-value bioactive compounds production based on Gordonia alkanivorans strain 1B biorefinery
oaire.awardTitleZero emissions system for fossil fuel desulfurization using Gordonia alkanivorans strain 1B
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/3599-PPCDT/PTDC%2FEAM-AMB%2F30975%2F2017/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT//SFRH%2FBD%2F104977%2F2014/PT
oaire.citation.conferencePlaceRiga, Latviapt_PT
oaire.citation.endPage106pt_PT
oaire.citation.startPage105pt_PT
oaire.citation.title19th International Conference on Renewable Resources & Biorefineries (RRB’2023)pt_PT
oaire.fundingStream3599-PPCDT
person.familyNameSilva
person.familyNameTavares
person.familyNamePaixão
person.familyNameAlves
person.givenNameTiago
person.givenNameJoão
person.givenNameSusana M.
person.givenNameLuís
person.identifier.ciencia-idE418-9EE4-9BB4
person.identifier.ciencia-id9B16-17EF-EBEE
person.identifier.ciencia-id7918-C133-C5FB
person.identifier.ciencia-id561B-53A5-7359
person.identifier.orcid0000-0003-0120-557X
person.identifier.orcid0000-0002-8671-0331
person.identifier.orcid0000-0003-0955-4467
person.identifier.orcid0000-0001-6245-775X
person.identifier.ridA-4832-2018
person.identifier.scopus-author-id57201151914
person.identifier.scopus-author-id6603112228
person.identifier.scopus-author-id6701310833
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsopenAccesspt_PT
rcaap.typeconferenceObjectpt_PT
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