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Optimization of an Indoor DWC Hydroponic Lettuce Production System to Generate a Low N and P Content Wastewater

2023-01-24Artigo científico Acesso aberto
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datacite.subject.fosEngenharia e Tecnologia
datacite.subject.sdg06:Água Potável e Saneamento
datacite.subject.sdg14:Proteger a Vida Marinha
dc.contributor.authorAires, Luis M. I.
dc.contributor.authorIspolnov, Kirill
dc.contributor.authorLuz, Tomás R.
dc.contributor.authorPala, Helena
dc.contributor.authorVieira, Judite S.
dc.date.accessioned2026-03-25T15:44:26Z
dc.date.available2026-03-25T15:44:26Z
dc.date.issued2023-01-24
dc.descriptionArticle number - 365
dc.descriptionThis article belongs to the Section Environmental and Green Processes.
dc.description.abstractHydroponic production raises economic and environmental issues related to the treatment, recovery or disposal of hydroponic wastewater, which can be rich in eutrophication-related nutrients, nitrogen (N) and phosphorus (P). Little focus has been put on the influence of the growth conditions on the N and P content in hydroponic wastewater, which is of uttermost importance when it is intended to reuse the wastewater for irrigation or other purposes with reduced impact on the environment. This study aimed to optimize an indoor non-recirculating deep-water culture (DWC) hydroponic system for lettuce (Lactuca sativa L. var. crispa) production, in terms of daily light integral (DLI) and volume of nutrient solution (NS) per plant, to maximize both the biomass production and the N and P removal, allowing for the wastewater to meet the criteria established for reusing in irrigation and minimizing the eutrophication impacts. A small-scale DWC hydroponic system with a fluorescent light fixture was built to study lettuce growth indoors for 35 days after transplanting (DAT). A first experiment was conducted under 14, 20 or 23 mol m−2 d−1 DLI and with 1.5 or 2 L of NS per plant. A pronounced inner leaf tip burn was observed, regardless of the volume of NS solution used, related to the unventilated conditions under high radiation. Total biomass was similar in all treatments and N and P removal was higher than 95% and 94%, respectively, at 35 DAT. Lettuces grown in 2 L of NS per plant exhibited higher average biomass. A second experiment was performed under 8, 10 or 12 mol m−2 d−1 DLI and with 2 or 3 L of NS per plant, making it possible to achieve healthy biomass at 35 DAT with higher water and light-use efficiency when compared to the first experiment. A DLI of 10 or 12 mol m−2 d−1 with 2 L of NS per plant and a DLI of 12 mol m−2 d−1 with 3 L of NS per plant made it possible to achieve both the best total biomass production and the highest N and P removal from water. Under those conditions, hydroponic wastewater complied with N and P criteria for reuse in irrigation, showing potential to be used as an alternative resource for agriculture and to minimize negative impacts on the environment.eng
dc.description.sponsorshipThis work was financially supported by LA/P/0045/2020 (ALiCE), UIDB/50020/2020 and UIDP/50020/2020 (LSRE-LCM), funded by national funds through FCT/MCTES (PIDDAC).
dc.identifier.citationAires, L. M. I., Ispolnov, K., Luz, T. R., Pala, H., & Vieira, J. S. (2023). Optimization of an Indoor DWC Hydroponic Lettuce Production System to Generate a Low N and P Content Wastewater. Processes, 11(2), 365. https://doi.org/10.3390/pr11020365
dc.identifier.doi10.3390/pr11020365
dc.identifier.issn2227-9717
dc.identifier.urihttp://hdl.handle.net/10400.8/15996
dc.language.isoeng
dc.peerreviewedyes
dc.publisherMDPI
dc.relationALICE - Associate Laboratory in Chemical Engineering
dc.relationLaboratory of Separation and Reaction Engineering - Laboratory of Catalysis and Materials
dc.relationLaboratory of Separation and Reaction Engineering - Laboratory of Catalysis and Materials
dc.relation.hasversionhttps://www.mdpi.com/2227-9717/11/2/365
dc.relation.ispartofProcesses
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subjectdaily light integral
dc.subjectdeep-water culture
dc.subjectLactuca sativaL
dc.subjectlight-use efficiency
dc.subjectN and P removal
dc.subjectwater-use efficiency
dc.titleOptimization of an Indoor DWC Hydroponic Lettuce Production System to Generate a Low N and P Content Wastewatereng
dc.typejournal article
dspace.entity.typePublication
oaire.awardNumberLA/P/0045/2020
oaire.awardNumberUIDP/50020/2020
oaire.awardNumberUIDB/50020/2020
oaire.awardTitleALICE - Associate Laboratory in Chemical Engineering
oaire.awardTitleLaboratory of Separation and Reaction Engineering - Laboratory of Catalysis and Materials
oaire.awardTitleLaboratory of Separation and Reaction Engineering - Laboratory of Catalysis and Materials
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/LA%2FP%2F0045%2F2020/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDP%2F50020%2F2020/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDB%2F50020%2F2020/PT
oaire.citation.endPage19
oaire.citation.issue2
oaire.citation.startPage1
oaire.citation.titleProcesses
oaire.citation.volume11
oaire.fundingStream6817 - DCRRNI ID
oaire.fundingStream6817 - DCRRNI ID
oaire.fundingStream6817 - DCRRNI ID
oaire.versionhttp://purl.org/coar/version/c_970fb48d4fbd8a85
person.familyNameIgreja Aires
person.familyNameIspolnov
person.familyNameLuz
person.familyNamePala
person.familyNameVieira
person.givenNameLuis Miguel
person.givenNameKirill
person.givenNameTomás
person.givenNameHelena
person.givenNameJudite
person.identifier.ciencia-id6C18-E6C2-F582
person.identifier.ciencia-id3015-DED5-A6B5
person.identifier.ciencia-id7B1B-7C11-411B
person.identifier.ciencia-idEA1B-12E3-7703
person.identifier.gsidhttps://scholar.google.com.br/citations?hl=pt-PT&user=7Wv10lIAAAAJ
person.identifier.orcid0000-0003-2052-6045
person.identifier.orcid0000-0003-0928-6714
person.identifier.orcid0000-0002-1533-1414
person.identifier.orcid0000-0001-7162-9621
person.identifier.orcid0000-0001-7982-5686
person.identifier.ridH-5018-2017
person.identifier.scopus-author-id16027706000
person.identifier.scopus-author-id23977995300
person.identifier.scopus-author-id6603182617
person.identifier.scopus-author-id36869854300
project.funder.identifierhttp://doi.org/10.13039/501100001871
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
project.funder.nameFundação para a Ciência e a Tecnologia
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LSRE-LCM - Artigos em Revistas Nacionais e de Circulação Internacional
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