Long term operation of a phototrophic biological nutrient removal system

Bibliographic Details
Main Author: Carvalho, V. C. F.
Publication Date: 2023
Other Authors: Fradinho, J. C., Oehmen, A., Reis, M. A. M.
Format: Article
Language: eng
Source: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Download full: http://hdl.handle.net/10362/154775
Summary: Funding 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
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spelling Long term operation of a phototrophic biological nutrient removal systemImpact of CO2 concentration and light exposure on process performanceAlgae for nutrients removalAnoxic systemsDenitrifying polyphosphate accumulating organisms (DPAOs)Microalgae-bacterial systemsPhotosynthetic microorganismsPhototrophic biological nutrient removal (photo-BNR)Environmental EngineeringWaste Management and DisposalManagement, Monitoring, Policy and LawSDG 6 - Clean Water and SanitationSDG 14 - Life Below WaterFunding 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 AuthorsThe 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.UCIBIO - Applied Molecular Biosciences UnitDQ - Departamento de QuímicaRUNCarvalho, V. C. F.Fradinho, J. C.Oehmen, A.Reis, M. A. M.2023-07-03T22:17:36Z2023-05-152023-05-15T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article10application/pdfhttp://hdl.handle.net/10362/154775eng0301-4797PURE: 65212279https://doi.org/10.1016/j.jenvman.2023.117490info: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:RCAAP2024-03-11T05:37:13Zoai:run.unl.pt:10362/154775Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T03:55:44.998624Repositório 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 Long term operation of a phototrophic biological nutrient removal system
Impact of CO2 concentration and light exposure on process performance
title Long term operation of a phototrophic biological nutrient removal system
spellingShingle Long term operation of a phototrophic biological nutrient removal system
Carvalho, V. C. F.
Algae for nutrients removal
Anoxic systems
Denitrifying polyphosphate accumulating organisms (DPAOs)
Microalgae-bacterial systems
Photosynthetic microorganisms
Phototrophic biological nutrient removal (photo-BNR)
Environmental Engineering
Waste Management and Disposal
Management, Monitoring, Policy and Law
SDG 6 - Clean Water and Sanitation
SDG 14 - Life Below Water
title_short Long term operation of a phototrophic biological nutrient removal system
title_full Long term operation of a phototrophic biological nutrient removal system
title_fullStr Long term operation of a phototrophic biological nutrient removal system
title_full_unstemmed Long term operation of a phototrophic biological nutrient removal system
title_sort Long term operation of a phototrophic biological nutrient removal system
author Carvalho, V. C. F.
author_facet Carvalho, V. C. F.
Fradinho, J. C.
Oehmen, A.
Reis, M. A. M.
author_role author
author2 Fradinho, J. C.
Oehmen, A.
Reis, M. A. M.
author2_role author
author
author
dc.contributor.none.fl_str_mv UCIBIO - Applied Molecular Biosciences Unit
DQ - Departamento de Química
RUN
dc.contributor.author.fl_str_mv Carvalho, V. C. F.
Fradinho, J. C.
Oehmen, A.
Reis, M. A. M.
dc.subject.por.fl_str_mv Algae for nutrients removal
Anoxic systems
Denitrifying polyphosphate accumulating organisms (DPAOs)
Microalgae-bacterial systems
Photosynthetic microorganisms
Phototrophic biological nutrient removal (photo-BNR)
Environmental Engineering
Waste Management and Disposal
Management, Monitoring, Policy and Law
SDG 6 - Clean Water and Sanitation
SDG 14 - Life Below Water
topic Algae for nutrients removal
Anoxic systems
Denitrifying polyphosphate accumulating organisms (DPAOs)
Microalgae-bacterial systems
Photosynthetic microorganisms
Phototrophic biological nutrient removal (photo-BNR)
Environmental Engineering
Waste Management and Disposal
Management, Monitoring, Policy and Law
SDG 6 - Clean Water and Sanitation
SDG 14 - Life Below Water
description Funding 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
publishDate 2023
dc.date.none.fl_str_mv 2023-07-03T22:17:36Z
2023-05-15
2023-05-15T00:00:00Z
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/10362/154775
url http://hdl.handle.net/10362/154775
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 0301-4797
PURE: 65212279
https://doi.org/10.1016/j.jenvman.2023.117490
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 10
application/pdf
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
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