Combined pretreatment by ultrasound and struvite precipitation of raw substrates: a strategy to overcome C/N ratio unbalance in nitrogen-rich anaerobic co-digestion systems

Detalhes bibliográficos
Autor(a) principal: Coura, Renata D'arc
Data de Publicação: 2021
Outros Autores: Rodrigues, Ana Cristina, Alonso, Joaquim Mamede, Ferraz, Ana Isabel, Brito, Luís Miguel, Abrantes, João Carlos Castro, Brito, Antonio Guerreiro De
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10400.5/21366
Resumo: The present study aimed to optimize the struvite chemical precipitation process in nitrogenrich anaerobic co-digestion systems. Struvite precipitation experiments were carried out using a mixture of cattle slurry liquid fraction and sewage sludge, with and without ultrasound pretreatment. Marine salt or MgCl2 were used as magnesium source in NH4 +:Mg2+ stoichiometric proportions of 1:1.5 and 1:3. Under the tested conditions, ammonium nitrogen and orthophosphate were removed from the mixed liquor with a maximum observed efficiency of 43% and 92%, respectively, when the ultrasound treatment was applied prior to struvite precipitation, using MgCl2 as source of magnesium (NH4 +:Mg2+ of 1:3). The operating time was 40 min. Different pretreatments were tested prior to the biomethanization experiments, struvite precipitation, ultrasound and a combination of both pretreatments. The application of ultrasound (with an energy input of 218 kJ L1) and struvite precipitation (NH4 +:Mg2+ of 1:3) increased the methane content in the biogas by 82% and reduced hydraulic retention time by 28%, when compared to the anaerobic co-digestion assays without pretreatment. The hydrolytic pretreatment increased the bioavailability of nitrogen by 5%, thus enhancing the removal efficiency of ammonium nitrogen by 20%. Consequently, an increase in the carbon to nitrogen ratio was observed, favoring the methanogenesis process
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spelling Combined pretreatment by ultrasound and struvite precipitation of raw substrates: a strategy to overcome C/N ratio unbalance in nitrogen-rich anaerobic co-digestion systemsultrasound pretreatmentstruvite precipitationnutrient recoverycircular economyanaerobic (co)digestionThe present study aimed to optimize the struvite chemical precipitation process in nitrogenrich anaerobic co-digestion systems. Struvite precipitation experiments were carried out using a mixture of cattle slurry liquid fraction and sewage sludge, with and without ultrasound pretreatment. Marine salt or MgCl2 were used as magnesium source in NH4 +:Mg2+ stoichiometric proportions of 1:1.5 and 1:3. Under the tested conditions, ammonium nitrogen and orthophosphate were removed from the mixed liquor with a maximum observed efficiency of 43% and 92%, respectively, when the ultrasound treatment was applied prior to struvite precipitation, using MgCl2 as source of magnesium (NH4 +:Mg2+ of 1:3). The operating time was 40 min. Different pretreatments were tested prior to the biomethanization experiments, struvite precipitation, ultrasound and a combination of both pretreatments. The application of ultrasound (with an energy input of 218 kJ L1) and struvite precipitation (NH4 +:Mg2+ of 1:3) increased the methane content in the biogas by 82% and reduced hydraulic retention time by 28%, when compared to the anaerobic co-digestion assays without pretreatment. The hydrolytic pretreatment increased the bioavailability of nitrogen by 5%, thus enhancing the removal efficiency of ammonium nitrogen by 20%. Consequently, an increase in the carbon to nitrogen ratio was observed, favoring the methanogenesis processMDPIRepositório da Universidade de LisboaCoura, Renata D'arcRodrigues, Ana CristinaAlonso, Joaquim MamedeFerraz, Ana IsabelBrito, Luís MiguelAbrantes, João Carlos CastroBrito, Antonio Guerreiro De2021-05-27T11:18:18Z20212021-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10400.5/21366engCoura, R.D.; Rodrigues, A.C.; Alonso, J.M.; Ferraz, A.I.; Brito, L.M.; Abrantes, J.C.C.; Brito, A.G. Combined Pretreatment by Ultrasound and Struvite Precipitation of Raw Substrates: A Strategy to Overcome C/N Ratio Unbalance in Nitrogen-Rich Anaerobic Co-Digestion Systems. Sustainability 2021, 13, 2175https://doi.org/ 10.3390/su13042175info: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:RCAAP2023-03-06T14:50:49Zoai:www.repository.utl.pt:10400.5/21366Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T17:05:58.009194Repositório 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 Combined pretreatment by ultrasound and struvite precipitation of raw substrates: a strategy to overcome C/N ratio unbalance in nitrogen-rich anaerobic co-digestion systems
title Combined pretreatment by ultrasound and struvite precipitation of raw substrates: a strategy to overcome C/N ratio unbalance in nitrogen-rich anaerobic co-digestion systems
spellingShingle Combined pretreatment by ultrasound and struvite precipitation of raw substrates: a strategy to overcome C/N ratio unbalance in nitrogen-rich anaerobic co-digestion systems
Coura, Renata D'arc
ultrasound pretreatment
struvite precipitation
nutrient recovery
circular economy
anaerobic (co)digestion
title_short Combined pretreatment by ultrasound and struvite precipitation of raw substrates: a strategy to overcome C/N ratio unbalance in nitrogen-rich anaerobic co-digestion systems
title_full Combined pretreatment by ultrasound and struvite precipitation of raw substrates: a strategy to overcome C/N ratio unbalance in nitrogen-rich anaerobic co-digestion systems
title_fullStr Combined pretreatment by ultrasound and struvite precipitation of raw substrates: a strategy to overcome C/N ratio unbalance in nitrogen-rich anaerobic co-digestion systems
title_full_unstemmed Combined pretreatment by ultrasound and struvite precipitation of raw substrates: a strategy to overcome C/N ratio unbalance in nitrogen-rich anaerobic co-digestion systems
title_sort Combined pretreatment by ultrasound and struvite precipitation of raw substrates: a strategy to overcome C/N ratio unbalance in nitrogen-rich anaerobic co-digestion systems
author Coura, Renata D'arc
author_facet Coura, Renata D'arc
Rodrigues, Ana Cristina
Alonso, Joaquim Mamede
Ferraz, Ana Isabel
Brito, Luís Miguel
Abrantes, João Carlos Castro
Brito, Antonio Guerreiro De
author_role author
author2 Rodrigues, Ana Cristina
Alonso, Joaquim Mamede
Ferraz, Ana Isabel
Brito, Luís Miguel
Abrantes, João Carlos Castro
Brito, Antonio Guerreiro De
author2_role author
author
author
author
author
author
dc.contributor.none.fl_str_mv Repositório da Universidade de Lisboa
dc.contributor.author.fl_str_mv Coura, Renata D'arc
Rodrigues, Ana Cristina
Alonso, Joaquim Mamede
Ferraz, Ana Isabel
Brito, Luís Miguel
Abrantes, João Carlos Castro
Brito, Antonio Guerreiro De
dc.subject.por.fl_str_mv ultrasound pretreatment
struvite precipitation
nutrient recovery
circular economy
anaerobic (co)digestion
topic ultrasound pretreatment
struvite precipitation
nutrient recovery
circular economy
anaerobic (co)digestion
description The present study aimed to optimize the struvite chemical precipitation process in nitrogenrich anaerobic co-digestion systems. Struvite precipitation experiments were carried out using a mixture of cattle slurry liquid fraction and sewage sludge, with and without ultrasound pretreatment. Marine salt or MgCl2 were used as magnesium source in NH4 +:Mg2+ stoichiometric proportions of 1:1.5 and 1:3. Under the tested conditions, ammonium nitrogen and orthophosphate were removed from the mixed liquor with a maximum observed efficiency of 43% and 92%, respectively, when the ultrasound treatment was applied prior to struvite precipitation, using MgCl2 as source of magnesium (NH4 +:Mg2+ of 1:3). The operating time was 40 min. Different pretreatments were tested prior to the biomethanization experiments, struvite precipitation, ultrasound and a combination of both pretreatments. The application of ultrasound (with an energy input of 218 kJ L1) and struvite precipitation (NH4 +:Mg2+ of 1:3) increased the methane content in the biogas by 82% and reduced hydraulic retention time by 28%, when compared to the anaerobic co-digestion assays without pretreatment. The hydrolytic pretreatment increased the bioavailability of nitrogen by 5%, thus enhancing the removal efficiency of ammonium nitrogen by 20%. Consequently, an increase in the carbon to nitrogen ratio was observed, favoring the methanogenesis process
publishDate 2021
dc.date.none.fl_str_mv 2021-05-27T11:18:18Z
2021
2021-01-01T00:00:00Z
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/10400.5/21366
url http://hdl.handle.net/10400.5/21366
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Coura, R.D.; Rodrigues, A.C.; Alonso, J.M.; Ferraz, A.I.; Brito, L.M.; Abrantes, J.C.C.; Brito, A.G. Combined Pretreatment by Ultrasound and Struvite Precipitation of Raw Substrates: A Strategy to Overcome C/N Ratio Unbalance in Nitrogen-Rich Anaerobic Co-Digestion Systems. Sustainability 2021, 13, 2175
https://doi.org/ 10.3390/su13042175
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv MDPI
publisher.none.fl_str_mv MDPI
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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