Increasing the energy production in an urban wastewater treatment plant using a high-rate activated sludge
The use of high-rate activated sludge (HRAS) reactors for the removal of COD in urban wastewater treatment plants (WWTPs) has been investigated because its potential contribution to energy generating WWTPs. A one-year operation period of a pilot plant treating the effluent of the primary settler of...
| Autores: | , , , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2022 |
| País: | España |
| Institución: | Universitat Autònoma de Barcelona |
| Repositorio: | Dipòsit Digital de Documents de la UAB |
| Idioma: | inglés |
| OAI Identifier: | oai:ddd.uab.cat:257996 |
| Acceso en línea: | https://ddd.uab.cat/record/257996 https://dx.doi.org/urn:doi:10.1016/j.jclepro.2022.131734 |
| Access Level: | acceso abierto |
| Palabra clave: | Biomethane potential Observed sludge yield coefficient COD mass balance Partial nitritation Autotrophic nitrogen removal |
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Increasing the energy production in an urban wastewater treatment plant using a high-rate activated sludgePilot plant demonstration and energy balanceCarrera, Julian|||0000-0002-2599-2312Carbó Monmany, Oriol|||0000-0001-5701-3775Doñate, Silvia|||0000-0003-0055-4970Suárez Ojeda, María Eugenia|||0000-0003-2520-2701Pérez Cañestro, Julio|||0000-0002-0119-5570Biomethane potentialObserved sludge yield coefficientCOD mass balancePartial nitritationAutotrophic nitrogen removalThe use of high-rate activated sludge (HRAS) reactors for the removal of COD in urban wastewater treatment plants (WWTPs) has been investigated because its potential contribution to energy generating WWTPs. A one-year operation period of a pilot plant treating the effluent of the primary settler of a full-scale WWTP was analyzed. The HRAS pilot plant operated without iron salts addition at temperatures between 12 and 28 ºC at an average organic loading rate 2.8 ± 0.5 kg COD m-3 d-1 and with an average inflow COD concentration of 330 ± 86 mg O2 L-1. The influence of sludge retention time (SRT) on COD recovery and biomethane potential of the produced sludge was investigated and compared to the full scale WWTP performance. The highest observed sludge yield coefficient and biomethane potential of the sludge were achieved at SRT of 0.6 days. The weak point of the HRAS performance at STR of 0.6 days is the high loss of organic matter in the effluent due to the limited efficiency of the solids separation in the secondary settler. At higher SRT (in the range 1.0-2.1 days), the secondary settler efficiency and the COD recovery are higher than those achieved at SRT of 0.6 days but part of the inlet ammonium can be nitrified in the HRAS system at temperatures above 20 ºC. A detailed energy balance indicated that two-thirds reduction of aeration requirements and one-third increase of biogas production could be achieved in a plant configuration in which HRAS is coupled to autotrophic biological nitrogen removal (BNR) compared to the heterotrophic BNR configuration, yielding a net energy production of ca. 0.1 kWh m-3 of treated water. 22022-01-0120222022-01-01Articlehttp://purl.org/coar/resource_type/c_6501VoRhttp://purl.org/coar/version/c_970fb48d4fbd8a85info:eu-repo/semantics/articleapplication/pdfhttps://ddd.uab.cat/record/257996https://dx.doi.org/urn:doi:10.1016/j.jclepro.2022.131734reponame:Dipòsit Digital de Documents de la UABinstname:Universitat Autònoma de BarcelonaInglésengopen accesshttp://purl.org/coar/access_right/c_abf2Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, sempre que no sigui amb finalitats comercials, i sempre que es reconegui l'autoria de l'obra original.https://creativecommons.org/licenses/by-nc/4.0/info:eu-repo/semantics/openAccessoai:ddd.uab.cat:2579962026-06-06T12:50:31Z |
| dc.title.none.fl_str_mv |
Increasing the energy production in an urban wastewater treatment plant using a high-rate activated sludge Pilot plant demonstration and energy balance |
| title |
Increasing the energy production in an urban wastewater treatment plant using a high-rate activated sludge |
| spellingShingle |
Increasing the energy production in an urban wastewater treatment plant using a high-rate activated sludge Carrera, Julian|||0000-0002-2599-2312 Biomethane potential Observed sludge yield coefficient COD mass balance Partial nitritation Autotrophic nitrogen removal |
| title_short |
Increasing the energy production in an urban wastewater treatment plant using a high-rate activated sludge |
| title_full |
Increasing the energy production in an urban wastewater treatment plant using a high-rate activated sludge |
| title_fullStr |
Increasing the energy production in an urban wastewater treatment plant using a high-rate activated sludge |
| title_full_unstemmed |
Increasing the energy production in an urban wastewater treatment plant using a high-rate activated sludge |
| title_sort |
Increasing the energy production in an urban wastewater treatment plant using a high-rate activated sludge |
| dc.creator.none.fl_str_mv |
Carrera, Julian|||0000-0002-2599-2312 Carbó Monmany, Oriol|||0000-0001-5701-3775 Doñate, Silvia|||0000-0003-0055-4970 Suárez Ojeda, María Eugenia|||0000-0003-2520-2701 Pérez Cañestro, Julio|||0000-0002-0119-5570 |
| author |
Carrera, Julian|||0000-0002-2599-2312 |
| author_facet |
Carrera, Julian|||0000-0002-2599-2312 Carbó Monmany, Oriol|||0000-0001-5701-3775 Doñate, Silvia|||0000-0003-0055-4970 Suárez Ojeda, María Eugenia|||0000-0003-2520-2701 Pérez Cañestro, Julio|||0000-0002-0119-5570 |
| author_role |
author |
| author2 |
Carbó Monmany, Oriol|||0000-0001-5701-3775 Doñate, Silvia|||0000-0003-0055-4970 Suárez Ojeda, María Eugenia|||0000-0003-2520-2701 Pérez Cañestro, Julio|||0000-0002-0119-5570 |
| author2_role |
author author author author |
| dc.subject.none.fl_str_mv |
Biomethane potential Observed sludge yield coefficient COD mass balance Partial nitritation Autotrophic nitrogen removal |
| topic |
Biomethane potential Observed sludge yield coefficient COD mass balance Partial nitritation Autotrophic nitrogen removal |
| description |
The use of high-rate activated sludge (HRAS) reactors for the removal of COD in urban wastewater treatment plants (WWTPs) has been investigated because its potential contribution to energy generating WWTPs. A one-year operation period of a pilot plant treating the effluent of the primary settler of a full-scale WWTP was analyzed. The HRAS pilot plant operated without iron salts addition at temperatures between 12 and 28 ºC at an average organic loading rate 2.8 ± 0.5 kg COD m-3 d-1 and with an average inflow COD concentration of 330 ± 86 mg O2 L-1. The influence of sludge retention time (SRT) on COD recovery and biomethane potential of the produced sludge was investigated and compared to the full scale WWTP performance. The highest observed sludge yield coefficient and biomethane potential of the sludge were achieved at SRT of 0.6 days. The weak point of the HRAS performance at STR of 0.6 days is the high loss of organic matter in the effluent due to the limited efficiency of the solids separation in the secondary settler. At higher SRT (in the range 1.0-2.1 days), the secondary settler efficiency and the COD recovery are higher than those achieved at SRT of 0.6 days but part of the inlet ammonium can be nitrified in the HRAS system at temperatures above 20 ºC. A detailed energy balance indicated that two-thirds reduction of aeration requirements and one-third increase of biogas production could be achieved in a plant configuration in which HRAS is coupled to autotrophic biological nitrogen removal (BNR) compared to the heterotrophic BNR configuration, yielding a net energy production of ca. 0.1 kWh m-3 of treated water. |
| publishDate |
2022 |
| dc.date.none.fl_str_mv |
2 2022-01-01 2022 2022-01-01 |
| dc.type.none.fl_str_mv |
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 |
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article |
| dc.identifier.none.fl_str_mv |
https://ddd.uab.cat/record/257996 https://dx.doi.org/urn:doi:10.1016/j.jclepro.2022.131734 |
| url |
https://ddd.uab.cat/record/257996 https://dx.doi.org/urn:doi:10.1016/j.jclepro.2022.131734 |
| dc.language.none.fl_str_mv |
Inglés eng |
| language_invalid_str_mv |
Inglés |
| language |
eng |
| dc.rights.none.fl_str_mv |
open access http://purl.org/coar/access_right/c_abf2 https://creativecommons.org/licenses/by-nc/4.0/ |
| dc.rights.openaire.fl_str_mv |
info:eu-repo/semantics/openAccess |
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open access http://purl.org/coar/access_right/c_abf2 https://creativecommons.org/licenses/by-nc/4.0/ |
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openAccess |
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application/pdf |
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reponame:Dipòsit Digital de Documents de la UAB instname:Universitat Autònoma de Barcelona |
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Universitat Autònoma de Barcelona |
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Dipòsit Digital de Documents de la UAB |
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