Effect of salinity and temperature on the extraction of extracellular polymeric substances from an anaerobic sludge and fouling in submerged hollow fibre membranes

The results of the characterisation of anaerobic sludge-derived extracellular polymeric substances (EPS) under different extraction conditions and their effects on the fouling in submerged hollow fibre membranes are presented. A wide range of EPS extraction results was obtained depending on the extr...

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Autores: Martínez Díaz, Raquel, Ruiz Pérez, María Olga, García Rodríguez, Ana, Ramos Rodríguez, Cipriano, Diez Blanco, Victorino
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2021
País:España
Institución:Universidad de Burgos (UBU)
Repositorio:Repositorio Institucional de la Universidad de Burgos (RIUBU)
OAI Identifier:oai:riubu.ubu.es:10259/6383
Acceso en línea:http://hdl.handle.net/10259/6383
Access Level:acceso abierto
Palabra clave:Extraction
Membrane fouling
Salinity
Extracellular polymeric substances
Humic substances
Ingeniería química
Chemical engineering
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spelling Effect of salinity and temperature on the extraction of extracellular polymeric substances from an anaerobic sludge and fouling in submerged hollow fibre membranesMartínez Díaz, RaquelRuiz Pérez, María OlgaGarcía Rodríguez, AnaRamos Rodríguez, CiprianoDiez Blanco, VictorinoExtractionMembrane foulingSalinityExtracellular polymeric substancesHumic substancesIngeniería químicaChemical engineeringThe results of the characterisation of anaerobic sludge-derived extracellular polymeric substances (EPS) under different extraction conditions and their effects on the fouling in submerged hollow fibre membranes are presented. A wide range of EPS extraction results was obtained depending on the extraction conditions. Proteins, polysaccharides, and humic substances represented 80–99% of the total organic matter extracted, with 54–60% identified as humic substances. Ultrasonication was more effective than vortex agitation, ensuring higher EPS extraction yields in a shorter contact time. The increase in temperature from 30 °C to 50 °C and the decrease in NaCl concentration favoured the EPS diffusion, but this positive temperature effect was negligible for an ultrasonic contact. Linear, quadratic, and combined effects of ultrasonication time and solvent salinity were statistically significant effects for ultrasonication-assisted EPS extraction. The highest extraction yield was achieved using ultrasonication at 30 ºC for at least 60 min with salt-free water as the solvent, and an EPS extract with 138.8 mg TOC/L was obtained. Batch ultrafiltration-backwash tests at different permeation rates allowed to determine the specific resistance to filtration of the EPS extracts, which increased from 103.8·1012 m/kg TOC to 169.4·1012 m/kg TOC in presence of 1.8 wt% of NaCl. Salinity also provided rigidity to the EPS gel layer, reducing the compressibility index from 0.23 to 0.03.TCUE 2018–2020 cofounded by European Regional Development Fund (ERDF) and Junta de Castilla y León, Spain. Ana García is grateful to the European Social Fund the Operative Program of Castile-Leon, the Regional Government of Castile-Leon, Spain, through the Ministry of Education, for her research contract (Orden EDU/310/2015).Elsevier202220222021info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttp://hdl.handle.net/10259/6383reponame:Repositorio Institucional de la Universidad de Burgos (RIUBU)instname:Universidad de Burgos (UBU)InglésColloids and Surfaces A: Physicochemical and Engineering Aspects. 2021, V. 625, 126910https://doi.org/10.1016/j.colsurfa.2021.126910Attribution-NonCommercial-NoDerivatives 4.0 Internacionalhttp://creativecommons.org/licenses/by-nc-nd/4.0/info:eu-repo/semantics/openAccessoai:riubu.ubu.es:10259/63832026-05-28T07:56:11Z
dc.title.none.fl_str_mv Effect of salinity and temperature on the extraction of extracellular polymeric substances from an anaerobic sludge and fouling in submerged hollow fibre membranes
title Effect of salinity and temperature on the extraction of extracellular polymeric substances from an anaerobic sludge and fouling in submerged hollow fibre membranes
spellingShingle Effect of salinity and temperature on the extraction of extracellular polymeric substances from an anaerobic sludge and fouling in submerged hollow fibre membranes
Martínez Díaz, Raquel
Extraction
Membrane fouling
Salinity
Extracellular polymeric substances
Humic substances
Ingeniería química
Chemical engineering
title_short Effect of salinity and temperature on the extraction of extracellular polymeric substances from an anaerobic sludge and fouling in submerged hollow fibre membranes
title_full Effect of salinity and temperature on the extraction of extracellular polymeric substances from an anaerobic sludge and fouling in submerged hollow fibre membranes
title_fullStr Effect of salinity and temperature on the extraction of extracellular polymeric substances from an anaerobic sludge and fouling in submerged hollow fibre membranes
title_full_unstemmed Effect of salinity and temperature on the extraction of extracellular polymeric substances from an anaerobic sludge and fouling in submerged hollow fibre membranes
title_sort Effect of salinity and temperature on the extraction of extracellular polymeric substances from an anaerobic sludge and fouling in submerged hollow fibre membranes
dc.creator.none.fl_str_mv Martínez Díaz, Raquel
Ruiz Pérez, María Olga
García Rodríguez, Ana
Ramos Rodríguez, Cipriano
Diez Blanco, Victorino
author Martínez Díaz, Raquel
author_facet Martínez Díaz, Raquel
Ruiz Pérez, María Olga
García Rodríguez, Ana
Ramos Rodríguez, Cipriano
Diez Blanco, Victorino
author_role author
author2 Ruiz Pérez, María Olga
García Rodríguez, Ana
Ramos Rodríguez, Cipriano
Diez Blanco, Victorino
author2_role author
author
author
author
dc.subject.none.fl_str_mv Extraction
Membrane fouling
Salinity
Extracellular polymeric substances
Humic substances
Ingeniería química
Chemical engineering
topic Extraction
Membrane fouling
Salinity
Extracellular polymeric substances
Humic substances
Ingeniería química
Chemical engineering
description The results of the characterisation of anaerobic sludge-derived extracellular polymeric substances (EPS) under different extraction conditions and their effects on the fouling in submerged hollow fibre membranes are presented. A wide range of EPS extraction results was obtained depending on the extraction conditions. Proteins, polysaccharides, and humic substances represented 80–99% of the total organic matter extracted, with 54–60% identified as humic substances. Ultrasonication was more effective than vortex agitation, ensuring higher EPS extraction yields in a shorter contact time. The increase in temperature from 30 °C to 50 °C and the decrease in NaCl concentration favoured the EPS diffusion, but this positive temperature effect was negligible for an ultrasonic contact. Linear, quadratic, and combined effects of ultrasonication time and solvent salinity were statistically significant effects for ultrasonication-assisted EPS extraction. The highest extraction yield was achieved using ultrasonication at 30 ºC for at least 60 min with salt-free water as the solvent, and an EPS extract with 138.8 mg TOC/L was obtained. Batch ultrafiltration-backwash tests at different permeation rates allowed to determine the specific resistance to filtration of the EPS extracts, which increased from 103.8·1012 m/kg TOC to 169.4·1012 m/kg TOC in presence of 1.8 wt% of NaCl. Salinity also provided rigidity to the EPS gel layer, reducing the compressibility index from 0.23 to 0.03.
publishDate 2021
dc.date.none.fl_str_mv 2021
2022
2022
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10259/6383
url http://hdl.handle.net/10259/6383
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Colloids and Surfaces A: Physicochemical and Engineering Aspects. 2021, V. 625, 126910
https://doi.org/10.1016/j.colsurfa.2021.126910
dc.rights.none.fl_str_mv Attribution-NonCommercial-NoDerivatives 4.0 Internacional
http://creativecommons.org/licenses/by-nc-nd/4.0/
info:eu-repo/semantics/openAccess
rights_invalid_str_mv Attribution-NonCommercial-NoDerivatives 4.0 Internacional
http://creativecommons.org/licenses/by-nc-nd/4.0/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:Repositorio Institucional de la Universidad de Burgos (RIUBU)
instname:Universidad de Burgos (UBU)
instname_str Universidad de Burgos (UBU)
reponame_str Repositorio Institucional de la Universidad de Burgos (RIUBU)
collection Repositorio Institucional de la Universidad de Burgos (RIUBU)
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,301603

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