Logo do repositório
 
Publicação

Long term operation of a phototrophic biological nutrient removal system

2023-05-15Artigo científico Acesso aberto
Ver registo simples
dc.contributor.authorCarvalho, V. C. F.
dc.contributor.authorFradinho, J. C.
dc.contributor.authorOehmen, A.
dc.contributor.authorReis, M. A. M.
dc.contributor.institutionUCIBIO - Applied Molecular Biosciences Unit
dc.contributor.institutionDQ - Departamento de Química
dc.contributor.pblAcademic Press | Elsevier
dc.date.accessioned2023-07-03T22:17:36Z
dc.date.available2023-07-03T22:17:36Z
dc.date.issued2023-05-15
dc.descriptionFunding Information: This research was financed by national funds from FCT-Fundação para a Ciência e a Tecnologia , I.P., in the scope of the project LA/P/0140/2020 of the Associate Laboratory Institute for Health and Bioeconomy—i4HB. Publisher Copyright: © 2023 The Authors
dc.description.abstractThe utilization of non-aerated microalgae-bacterial consortia for phototrophic biological nutrient removal (photo-BNR) has emerged as an alternative to conventional wastewater treatment. Photo-BNR systems are operated under transient illumination, with alternating dark-anaerobic, light-aerobic and dark-anoxic conditions. A deep understanding of the impact of operational parameters on the microbial consortium and respective nutrient removal efficiency in photo-BNR systems is required. The present study evaluates, for the first time, the long-term operation (260 days) of a photo-BNR system, fed with a COD:N:P mass ratio of 7.5:1:1, to understand its operational limitations. In particular, different CO2 concentrations in the feed (between 22 and 60 mg C/L of Na2CO3) and variations of light exposure (from 2.75 h to 5.25 h per 8 h cycle) were studied to determine their impact on key parameters, like oxygen production and availability of polyhydroxyalkanoates (PHA), on the performance of anoxic denitrification by polyphosphate accumulating organisms. Results indicate that oxygen production was more dependent on the light availability than on the CO2 concentration. Also, under operational conditions with a COD:Na2CO3 ratio of 8.3 mg COD/mg C and an average light availability of 5.4 ± 1.3 W h/g TSS, no internal PHA limitation was observed, and 95 ± 7%, 92 ± 5% and 86 ± 5% of removal efficiency could be achieved for phosphorus, ammonia and total nitrogen, respectively. 81 ± 1.7% of the ammonia was assimilated into the microbial biomass and 19 ± 1.7% was nitrified, showing that biomass assimilation was the main N removal mechanism taking place in the bioreactor. Overall, the photo-BNR system presented a good settling capacity (SVI ∼60 mL/g TSS) and was able to remove 38 ± 3.3 mg P/L and 33 ± 1.7 mg N/L, highlighting its potential for achieving wastewater treatment without the need of aeration.en
dc.description.versionpublishersversion
dc.description.versionpublished
dc.format.extent10
dc.format.extent4644457
dc.identifier.doi10.1016/j.jenvman.2023.117490
dc.identifier.issn0301-4797
dc.identifier.otherPURE: 65212279
dc.identifier.otherPURE UUID: ba00a3d6-87b7-452d-ac8a-5f6bd437d210
dc.identifier.otherScopus: 85148053996
dc.identifier.otherWOS: 000965318100001
dc.identifier.otherPubMed: 36801686
dc.identifier.urihttp://hdl.handle.net/10362/154775
dc.identifier.urlhttps://www.scopus.com/pages/publications/85148053996
dc.language.isoeng
dc.peerreviewedyes
dc.relationinfo:eu-repo/grantAgreement/FCT/OE/PD%2FBD%2F114574%2F2016/PT
dc.relationUtilization of photosynthetic mixed cultures PMC as new technology for biopolymer production sing agro-industrial residues as feedstock
dc.relationApplied Molecular Biosciences Unit
dc.relationApplied Molecular Biosciences Unit
dc.subjectAlgae for nutrients removal
dc.subjectAnoxic systems
dc.subjectDenitrifying polyphosphate accumulating organisms (DPAOs)
dc.subjectMicroalgae-bacterial systems
dc.subjectPhotosynthetic microorganisms
dc.subjectPhototrophic biological nutrient removal (photo-BNR)
dc.subjectEnvironmental Engineering
dc.subjectWaste Management and Disposal
dc.subjectManagement, Monitoring, Policy and Law
dc.subjectSDG 6 - Clean Water and Sanitation
dc.subjectSDG 14 - Life Below Water
dc.titleLong term operation of a phototrophic biological nutrient removal systemen
dc.title.subtitleImpact of CO2 concentration and light exposure on process performanceen
dc.typejournal article
degois.publication.titleJournal of Environmental Management
degois.publication.volume334
dspace.entity.typePublication
oaire.awardNumberPD/BD/114574/2016
oaire.awardNumberUIDP/04378/2020
oaire.awardNumberUIDB/04378/2020
oaire.awardTitleUtilization of photosynthetic mixed cultures PMC as new technology for biopolymer production sing agro-industrial residues as feedstock
oaire.awardTitleApplied Molecular Biosciences Unit
oaire.awardTitleApplied Molecular Biosciences Unit
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/OE/PD%2FBD%2F114574%2F2016/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDP%2F04378%2F2020/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDB%2F04378%2F2020/PT
oaire.fundingStreamOE
oaire.fundingStream6817 - DCRRNI ID
oaire.fundingStream6817 - DCRRNI ID
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
rcaap.rightsopenAccess
relation.isProjectOfPublication2d9840dc-cd16-4e01-be81-2a5f925d2ff4
relation.isProjectOfPublication38373452-5c9c-4724-8def-f03314ecce0e
relation.isProjectOfPublicatione07cf232-4705-4b5b-b2c4-af8f25311076
relation.isProjectOfPublication.latestForDiscovery38373452-5c9c-4724-8def-f03314ecce0e

Ficheiros

Principais
A mostrar 1 - 1 de 1
Miniatura
Nome:
Long_term.pdf
Tamanho:
4.43 MB
Formato:
Adobe Portable Document Format
Ver/Abrir

Coleções

Home collection (FCT)