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Summer production of lettuce grown in a hydroponic system using wastewater

2022-11-02Comunicação em conferência Acesso aberto
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datacite.subject.fosEngenharia e Tecnologia::Engenharia Química
datacite.subject.sdg12:Produção e Consumo Sustentáveis
dc.contributor.authorVieira, Judite
dc.contributor.authorVaz, Daniela C.
dc.contributor.authorSantos, Ounísia
dc.contributor.authorPala, Helena
dc.date.accessioned2026-03-23T09:47:53Z
dc.date.available2026-03-23T09:47:53Z
dc.date.issued2022-11-02
dc.descriptionConference paper: Summer production of lettuce grown in a hydroponic system using wastewater - Artigo nº 5 Conference name: World Conference on Climate Change & Sustainability Local/Date: Frankfurt, Germany, 1–3 September 2022. Journal: Carbon Footprints, 2022; 2:5 – Meeting Abstracts.
dc.description.abstractPopulation growth leads to an increasing need for food production, which causes negative impacts on the environment, namely a higher use of water, and fast depleting land. The search for more efficient technologies in the agricultural sector aims for sustainable production, reducing water consumption and waste, inducing wastewater reuse, and the use of soilless cropping systems as an alternative to traditional agriculture. The aim of this study was to evaluate the growth of lettuces in wastewater from an urban treatment plant in a small hydroponic system, without recirculation, during the summer period, when the scarcity of water is higher thus increasing the impacts of crop production with soil. The crop growth was studied under three different conditions: wastewater (after primary or secondary treatment); wastewater with potassium supplementation; and synthetic medium, as control. Physical and chemical parameters of the wastewater, crop growth, and the environmental conditions of the greenhouse were monitored. At end of the assay the crop fresh weight was determined, and toxicity analysis were carried out through cell viability assays with the Caco-2 cell line. Results point to a limited crop growth in the wastewater with a secondary treatment, due to low nutrients concentrations, which affects the plants fresh weight. Solids load, pH value and nitrite concentration in wastewater seem to affect crop growth. Wastewater with a primary treatment had a large organic load, and the system allowed the removal of over 98% of BOD5 and the removal of over 68% of COD. The system provided an improvement in the wastewater quality, allowing the removal of the nutrient load (minimum value) of 43% N, 53% K, and 46% P (total phosphorus). For extract percentages up to 1% (w/v) there is no evidence of toxicity associated with the lettuce culture from the hydroponic system. The reuse of urban wastewater in hydroponics seems to be a sustainable promising technology that may complement the lack of crop production in soil due to water scarce.eng
dc.description.sponsorshipBase Funding UIDB/50020/2020 Programmatic Funding UIDP/50020/2020
dc.identifier.citationVieira, J. S., Vaz, D. C., Sousa, H. P. D., & Santos, O. (2022). Summer production of lettuce grown in a hydroponic system using wastewater. In World Conference on Climate Change & Sustainability (Frankfurt, Germany, 1–3 September 2022). Carbon Footprints – Meeting Abstracts. https://doi.org/10.20517/cf.2022.19
dc.identifier.doi10.20517/cf.2022.19
dc.identifier.eissn2831-932X
dc.identifier.urihttp://hdl.handle.net/10400.8/15941
dc.language.isoeng
dc.peerreviewedyes
dc.publisherOAE Publishing Inc.
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.oaepublish.com/articles/cf.2022.19
dc.relation.ispartofCarbon Footprints
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subjecthydroponic system
dc.subjectwastewater
dc.subjectlettuce
dc.titleSummer production of lettuce grown in a hydroponic system using wastewatereng
dc.title.alternativeMeeting Abstracts of World Conference on Climate Change & Sustainability, 1-3 September 2022eng
dc.typeconference paper
dspace.entity.typePublication
oaire.awardNumberUIDB/50020/2020
oaire.awardNumberUIDP/50020/2020
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/UIDB%2F50020%2F2020/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDP%2F50020%2F2020/PT
oaire.citation.conferenceDate2022-09
oaire.citation.conferencePlaceFrankfurt, Germany
oaire.citation.endPage21
oaire.citation.startPage21
oaire.citation.titleCarbon Footprints
oaire.citation.volume2
oaire.fundingStream6817 - DCRRNI ID
oaire.fundingStream6817 - DCRRNI ID
oaire.versionhttp://purl.org/coar/version/c_970fb48d4fbd8a85
person.familyNameVieira
person.familyNameBarroso de Moura Cipreste Vaz
person.familyNameDelgado dos Santos
person.familyNamePala
person.givenNameJudite
person.givenNameDaniela
person.givenNameOunísia
person.givenNameHelena
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person.identifier.ciencia-id801A-7761-328C
person.identifier.ciencia-idE810-0C68-0494
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person.identifier.orcid0000-0001-5007-5252
person.identifier.orcid0000-0001-7162-9621
person.identifier.ridH-5018-2017
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person.identifier.scopus-author-id36869854300
person.identifier.scopus-author-id6602838931
person.identifier.scopus-author-id6603182617
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
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31. Summer production of lettuce grown in a hydroponic system using wastewater Judite S. Vieira1,2, Daniela C. Vaz1,2,3, Helena Pala D. Sousa1,2, Ounísia Santos1,2 1School of Technology and Management, Polytechnic Institute of Leiria, Campus 2, Morro do Lena–Alto do Vieiro, Leiria 2411-901, Portugal. 2Laboratory of Separation and Reaction Engineering, Chemical Engineering Department, Faculty of Engineering, University of Porto, Porto 4200-465, Portugal. 3Coimbra Chemistry Center, Department of Chemistry, Institute of Molecular Sciences, University of Coimbra, Coimbra 3004-535, Portugal. Population growth leads to an increasing need for food production, which causes negative impacts on the environment, namely a higher use of water, and fast depleting land. The search for more efficient technologies in the agricultural sector aims for sustainable production, reducing water consumption and waste, inducing wastewater reuse, and the use of soilless cropping systems as an alternative to traditional agriculture. The aim of this study was to evaluate the growth of lettuces in wastewater from an urban treatment plant in a small hydroponic system, without recirculation, during the summer period, when the scarcity of water is higher thus increasing the impacts of crop production with soil. The crop growth was studied under three different conditions: wastewater (after primary or secondary treatment); wastewater with potassium supplementation; and synthetic medium, as control. Physical and chemical parameters of the wastewater, crop growth, and the environmental conditions of the greenhouse were monitored. At end of the assay the crop fresh weight was determined, and toxicity analysis were carried out through cell viability assays with the Caco-2 cell line. Results point to a limited crop growth in the wastewater with a secondary treatment, due to low nutrients concentrations, which affects the plants fresh weight. Solids load, pH value and nitrite concentration in wastewater seem to affect crop growth. Wastewater with a primary treatment had a large organic load, and the system allowed the removal of over 98% of BOD5 and the removal of over 68% of COD. The system provided an improvement in the wastewater quality, allowing the removal of the nutrient load (minimum value) of 43% N, 53% K, and 46% P (total phosphorus). For extract percentages up to 1% (w/v) there is no evidence of toxicity associated with the lettuce culture from the hydroponic system. The reuse of urban wastewater in hydroponics seems to be a sustainable promising technology that may complement the lack of crop production in soil due to water scarce.
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