The role of extracellular polymeric substances in micropollutant removal
Main Author: | |
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Publication Date: | 2022 |
Other Authors: | , , |
Format: | Article |
Language: | eng |
Source: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Download full: | https://hdl.handle.net/1822/77529 |
Summary: | In biological wastewater treatment (WWT), microorganisms live and grow held together by a slime matrix comprised of extracellular polymeric substances (EPS), forming a three-dimensional microbial structure of aggregates (flocs or granules) and by chemical binding forces. Furthermore, microscopic observations showed that microbial cells within the flocs were cross linked with EPS, forming a network of polymers with pores and channels. The EPS are typically composed of organic substances such as polysaccharides (PS), proteins (PNs), humic acid substances (HAS), nucleic acids, and lipids. It has been established that EPS play an essential role in aggregate flocculation, settling, and dewatering. Moreover, in the presence of toxic substances, such as pharmaceutical compounds and pesticides, EPS form a protective layer for the aggregated biomass against environmental disturbances that might play an important role in the transport and transformation of micropollutants. Some researchers indicated that there is an increase in EPS concentration under toxic conditions, which can induce an increase in the size of microbial aggregates. In this contribution, we critically review the available information on the impact of micropollutants on microbial EPS production and the relationship between EPS and microbial aggregate structure. Also, a general definition, composition, and factors that affect EPS production are presented. |
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The role of extracellular polymeric substances in micropollutant removalaggregatespolysaccharidesproteinsbioflocculationmicropollutantsIn biological wastewater treatment (WWT), microorganisms live and grow held together by a slime matrix comprised of extracellular polymeric substances (EPS), forming a three-dimensional microbial structure of aggregates (flocs or granules) and by chemical binding forces. Furthermore, microscopic observations showed that microbial cells within the flocs were cross linked with EPS, forming a network of polymers with pores and channels. The EPS are typically composed of organic substances such as polysaccharides (PS), proteins (PNs), humic acid substances (HAS), nucleic acids, and lipids. It has been established that EPS play an essential role in aggregate flocculation, settling, and dewatering. Moreover, in the presence of toxic substances, such as pharmaceutical compounds and pesticides, EPS form a protective layer for the aggregated biomass against environmental disturbances that might play an important role in the transport and transformation of micropollutants. Some researchers indicated that there is an increase in EPS concentration under toxic conditions, which can induce an increase in the size of microbial aggregates. In this contribution, we critically review the available information on the impact of micropollutants on microbial EPS production and the relationship between EPS and microbial aggregate structure. Also, a general definition, composition, and factors that affect EPS production are presented.The authors thank the Portuguese Foundation for Science and Technology (FCT) under the scope of the strategic funding of UIDB/04469/2020 unit. The authors also acknowledge the financial support to AM through the Grant Number 240–20170220 provided by Instituto Federal de Educação, Ciência e Tecnologia de Pernambuco (IFPE). DM and CQ thank FCT for funding through program DL 57/2016— Norma transitória.info:eu-repo/semantics/publishedVersionFrontiers MediaUniversidade do MinhoMelo, A. R. B.Quintelas, CristinaFerreira, Eugénio C.Mesquita, D. P.2022-05-042022-05-04T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/1822/77529engMelo A, Quintelas C, Ferreira EC and Mesquita DP (2022) The Role of Extracellular Polymeric Substances in Micropollutant Removal. Front. Chem. Eng. 4:778469. doi: 10.3389/fceng.2022.7784692673-271810.3389/fceng.2022.778469778469https://www.frontiersin.org/articles/10.3389/fceng.2022.778469/fullinfo: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:RCAAP2023-07-21T11:59:13Zoai:repositorium.sdum.uminho.pt:1822/77529Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T18:48:58.206779Repositório 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 |
The role of extracellular polymeric substances in micropollutant removal |
title |
The role of extracellular polymeric substances in micropollutant removal |
spellingShingle |
The role of extracellular polymeric substances in micropollutant removal Melo, A. R. B. aggregates polysaccharides proteins bioflocculation micropollutants |
title_short |
The role of extracellular polymeric substances in micropollutant removal |
title_full |
The role of extracellular polymeric substances in micropollutant removal |
title_fullStr |
The role of extracellular polymeric substances in micropollutant removal |
title_full_unstemmed |
The role of extracellular polymeric substances in micropollutant removal |
title_sort |
The role of extracellular polymeric substances in micropollutant removal |
author |
Melo, A. R. B. |
author_facet |
Melo, A. R. B. Quintelas, Cristina Ferreira, Eugénio C. Mesquita, D. P. |
author_role |
author |
author2 |
Quintelas, Cristina Ferreira, Eugénio C. Mesquita, D. P. |
author2_role |
author author author |
dc.contributor.none.fl_str_mv |
Universidade do Minho |
dc.contributor.author.fl_str_mv |
Melo, A. R. B. Quintelas, Cristina Ferreira, Eugénio C. Mesquita, D. P. |
dc.subject.por.fl_str_mv |
aggregates polysaccharides proteins bioflocculation micropollutants |
topic |
aggregates polysaccharides proteins bioflocculation micropollutants |
description |
In biological wastewater treatment (WWT), microorganisms live and grow held together by a slime matrix comprised of extracellular polymeric substances (EPS), forming a three-dimensional microbial structure of aggregates (flocs or granules) and by chemical binding forces. Furthermore, microscopic observations showed that microbial cells within the flocs were cross linked with EPS, forming a network of polymers with pores and channels. The EPS are typically composed of organic substances such as polysaccharides (PS), proteins (PNs), humic acid substances (HAS), nucleic acids, and lipids. It has been established that EPS play an essential role in aggregate flocculation, settling, and dewatering. Moreover, in the presence of toxic substances, such as pharmaceutical compounds and pesticides, EPS form a protective layer for the aggregated biomass against environmental disturbances that might play an important role in the transport and transformation of micropollutants. Some researchers indicated that there is an increase in EPS concentration under toxic conditions, which can induce an increase in the size of microbial aggregates. In this contribution, we critically review the available information on the impact of micropollutants on microbial EPS production and the relationship between EPS and microbial aggregate structure. Also, a general definition, composition, and factors that affect EPS production are presented. |
publishDate |
2022 |
dc.date.none.fl_str_mv |
2022-05-04 2022-05-04T00:00:00Z |
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 |
https://hdl.handle.net/1822/77529 |
url |
https://hdl.handle.net/1822/77529 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Melo A, Quintelas C, Ferreira EC and Mesquita DP (2022) The Role of Extracellular Polymeric Substances in Micropollutant Removal. Front. Chem. Eng. 4:778469. doi: 10.3389/fceng.2022.778469 2673-2718 10.3389/fceng.2022.778469 778469 https://www.frontiersin.org/articles/10.3389/fceng.2022.778469/full |
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info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Frontiers Media |
publisher.none.fl_str_mv |
Frontiers Media |
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Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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RCAAP |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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