Digested sludge quality in mesophilic, thermophilic and temperature-phased anaerobic digestion systems

Anaerobic digestion (AD) technology is commonly used to treat sewage sludge from activated sludge systems, meanwhile alleviating the energy demand (and costs) for wastewater treatment. Most often, anaerobic digestion is run in single-stage systems under mesophilic conditions, as this temperature reg...

Descripción completa

Detalles Bibliográficos
Autores: Lanko, Iryna|||0000-0002-3746-0057, Hejnic, Jakob, Rihová Ambrozová, Jana, Ferrer Martí, Ivet|||0000-0002-4568-4843, Jenicek, Pavel
Tipo de recurso: artículo
Fecha de publicación:2021
País:España
Institución:Universitat Politècnica de Catalunya (UPC)
Repositorio:UPCommons. Portal del coneixement obert de la UPC
Idioma:inglés
OAI Identifier:oai:upcommons.upc.edu:2117/364886
Acceso en línea:https://hdl.handle.net/2117/364886
https://dx.doi.org/10.3390/w13202839
Access Level:acceso abierto
Palabra clave:Sewage sludge -- Management
Mesophilic
Thermophilic
Temperature-phased anaerobic digestion (TPAD)
Dewaterability
Sludge quality
Sludge valorisation
Llots de depuradora
Àrees temàtiques de la UPC::Desenvolupament humà i sostenible::Enginyeria ambiental::Tractament dels residus
id ES_abcffd8032b63ee99c3632d58d83ea75
oai_identifier_str oai:upcommons.upc.edu:2117/364886
network_acronym_str ES
network_name_str España
repository_id_str
spelling Digested sludge quality in mesophilic, thermophilic and temperature-phased anaerobic digestion systemsLanko, Iryna|||0000-0002-3746-0057Hejnic, JakobRihová Ambrozová, JanaFerrer Martí, Ivet|||0000-0002-4568-4843Jenicek, PavelSewage sludge -- ManagementMesophilicThermophilicTemperature-phased anaerobic digestion (TPAD)DewaterabilitySludge qualitySludge valorisationLlots de depuradoraÀrees temàtiques de la UPC::Desenvolupament humà i sostenible::Enginyeria ambiental::Tractament dels residusAnaerobic digestion (AD) technology is commonly used to treat sewage sludge from activated sludge systems, meanwhile alleviating the energy demand (and costs) for wastewater treatment. Most often, anaerobic digestion is run in single-stage systems under mesophilic conditions, as this temperature regime is considered to be more stable than the thermophilic one. However, it is known that thermophilic conditions are advantageous over mesophilic ones in terms of methane production and digestate hygienisation, while it is unclear which one is better concerning the digestate dewaterability. Temperature-phased anaerobic digestion (TPAD) is a double-stage AD process that combines the above-mentioned temperature regimes, by operating a thermophilic digester followed by a mesophilic one. The aim of this study is to compare the digestate quality of single-stage mesophilic and thermophilic AD and TPAD systems, in terms of the dewaterability, pathogenic safety and lower calorific value (LCV) and, based on the comparison, consider digested sludge final disposal alternatives. The research is conducted in lab-scale reactors treating waste-activated sludge. The dewaterability is tested by two methods, namely, centrifugation and mechanical pressing. The experimental results show that the TPAD system is the most beneficial in terms of organic matter degradation efficiency (32.4% against 27.2 for TAD and 26.0 for MAD), producing a digestate with a high dewaterability (8.1–9.8% worse than for TAD and 6.2–12.0% better than for MAD) and pathogenic safety (coliforms and Escherichia coli were not detected, and Clostridium perfringens were counted up to 4.8–4.9 × 103, when for TAD it was only 1.4–2.5 × 103, and for MAD it was 1.3–1.8 × 104), with the lowest LCV (19.2% against 15.4% and 15.8% under thermophilic and mesophilic conditions, respectively). Regarding the final disposal, the digested sludge after TAD can be applied directly in agriculture; after TPAD, it can be used as a fertilizer only in the case where the fermenter HRT assures the pathogenic safety. The MAD digestate is the best for being used as a fuel preserving a higher portion of organic matter, not transforming into biogas during AD.This research was funded by the European Union’s Horizon 2020 research and innovation programme under the Marie Skłodowska-Curie grant agreement no 676070. This communication reflects only the authors’ view and the Research Executive Agency of the EU is not responsible for any use that may be made of the information it contains.Peer Reviewed20212021-10-0120222022-03-25journal articlehttp://purl.org/coar/resource_type/c_6501VoRhttp://purl.org/coar/version/c_970fb48d4fbd8a85info:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/2117/364886https://dx.doi.org/10.3390/w13202839reponame:UPCommons. Portal del coneixement obert de la UPCinstname:Universitat Politècnica de Catalunya (UPC)InglésengEuropean Commission http://doi.org/10.13039/100010661 Horizon 2020 Framework Programme 676070 Sustainable Product, Energy and Resource Recovery from Wastewateropen accesshttp://purl.org/coar/access_right/c_abf2Attribution 3.0 Spainhttp://creativecommons.org/licenses/by/3.0/es/info:eu-repo/semantics/openAccessoai:upcommons.upc.edu:2117/3648862026-05-27T15:37:01Z
dc.title.none.fl_str_mv Digested sludge quality in mesophilic, thermophilic and temperature-phased anaerobic digestion systems
title Digested sludge quality in mesophilic, thermophilic and temperature-phased anaerobic digestion systems
spellingShingle Digested sludge quality in mesophilic, thermophilic and temperature-phased anaerobic digestion systems
Lanko, Iryna|||0000-0002-3746-0057
Sewage sludge -- Management
Mesophilic
Thermophilic
Temperature-phased anaerobic digestion (TPAD)
Dewaterability
Sludge quality
Sludge valorisation
Llots de depuradora
Àrees temàtiques de la UPC::Desenvolupament humà i sostenible::Enginyeria ambiental::Tractament dels residus
title_short Digested sludge quality in mesophilic, thermophilic and temperature-phased anaerobic digestion systems
title_full Digested sludge quality in mesophilic, thermophilic and temperature-phased anaerobic digestion systems
title_fullStr Digested sludge quality in mesophilic, thermophilic and temperature-phased anaerobic digestion systems
title_full_unstemmed Digested sludge quality in mesophilic, thermophilic and temperature-phased anaerobic digestion systems
title_sort Digested sludge quality in mesophilic, thermophilic and temperature-phased anaerobic digestion systems
dc.creator.none.fl_str_mv Lanko, Iryna|||0000-0002-3746-0057
Hejnic, Jakob
Rihová Ambrozová, Jana
Ferrer Martí, Ivet|||0000-0002-4568-4843
Jenicek, Pavel
author Lanko, Iryna|||0000-0002-3746-0057
author_facet Lanko, Iryna|||0000-0002-3746-0057
Hejnic, Jakob
Rihová Ambrozová, Jana
Ferrer Martí, Ivet|||0000-0002-4568-4843
Jenicek, Pavel
author_role author
author2 Hejnic, Jakob
Rihová Ambrozová, Jana
Ferrer Martí, Ivet|||0000-0002-4568-4843
Jenicek, Pavel
author2_role author
author
author
author
dc.subject.none.fl_str_mv Sewage sludge -- Management
Mesophilic
Thermophilic
Temperature-phased anaerobic digestion (TPAD)
Dewaterability
Sludge quality
Sludge valorisation
Llots de depuradora
Àrees temàtiques de la UPC::Desenvolupament humà i sostenible::Enginyeria ambiental::Tractament dels residus
topic Sewage sludge -- Management
Mesophilic
Thermophilic
Temperature-phased anaerobic digestion (TPAD)
Dewaterability
Sludge quality
Sludge valorisation
Llots de depuradora
Àrees temàtiques de la UPC::Desenvolupament humà i sostenible::Enginyeria ambiental::Tractament dels residus
description Anaerobic digestion (AD) technology is commonly used to treat sewage sludge from activated sludge systems, meanwhile alleviating the energy demand (and costs) for wastewater treatment. Most often, anaerobic digestion is run in single-stage systems under mesophilic conditions, as this temperature regime is considered to be more stable than the thermophilic one. However, it is known that thermophilic conditions are advantageous over mesophilic ones in terms of methane production and digestate hygienisation, while it is unclear which one is better concerning the digestate dewaterability. Temperature-phased anaerobic digestion (TPAD) is a double-stage AD process that combines the above-mentioned temperature regimes, by operating a thermophilic digester followed by a mesophilic one. The aim of this study is to compare the digestate quality of single-stage mesophilic and thermophilic AD and TPAD systems, in terms of the dewaterability, pathogenic safety and lower calorific value (LCV) and, based on the comparison, consider digested sludge final disposal alternatives. The research is conducted in lab-scale reactors treating waste-activated sludge. The dewaterability is tested by two methods, namely, centrifugation and mechanical pressing. The experimental results show that the TPAD system is the most beneficial in terms of organic matter degradation efficiency (32.4% against 27.2 for TAD and 26.0 for MAD), producing a digestate with a high dewaterability (8.1–9.8% worse than for TAD and 6.2–12.0% better than for MAD) and pathogenic safety (coliforms and Escherichia coli were not detected, and Clostridium perfringens were counted up to 4.8–4.9 × 103, when for TAD it was only 1.4–2.5 × 103, and for MAD it was 1.3–1.8 × 104), with the lowest LCV (19.2% against 15.4% and 15.8% under thermophilic and mesophilic conditions, respectively). Regarding the final disposal, the digested sludge after TAD can be applied directly in agriculture; after TPAD, it can be used as a fertilizer only in the case where the fermenter HRT assures the pathogenic safety. The MAD digestate is the best for being used as a fuel preserving a higher portion of organic matter, not transforming into biogas during AD.
publishDate 2021
dc.date.none.fl_str_mv 2021
2021-10-01
2022
2022-03-25
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
VoR
http://purl.org/coar/version/c_970fb48d4fbd8a85
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://hdl.handle.net/2117/364886
https://dx.doi.org/10.3390/w13202839
url https://hdl.handle.net/2117/364886
https://dx.doi.org/10.3390/w13202839
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.relation.none.fl_str_mv European Commission http://doi.org/10.13039/100010661 Horizon 2020 Framework Programme 676070 Sustainable Product, Energy and Resource Recovery from Wastewater
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
Attribution 3.0 Spain
http://creativecommons.org/licenses/by/3.0/es/
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
Attribution 3.0 Spain
http://creativecommons.org/licenses/by/3.0/es/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv reponame:UPCommons. Portal del coneixement obert de la UPC
instname:Universitat Politècnica de Catalunya (UPC)
instname_str Universitat Politècnica de Catalunya (UPC)
reponame_str UPCommons. Portal del coneixement obert de la UPC
collection UPCommons. Portal del coneixement obert de la UPC
repository.name.fl_str_mv
repository.mail.fl_str_mv
_version_ 1869416301734133760
score 15,300724

Similares en LA Referencia