Fly ash as stimulant for anaerobic digestion: effect over hydrolytic stage and methane generation rate

Thermoelectric fly ash was used as a micronutrient source for microorganisms in the anaerobic digestion process of thermally pretreated (1 hour, 120 °C) secondary sludge. The obtained results not only suggest that fly ash improves methane generation in the conversion of volatile fatty acids into met...

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Detalhes bibliográficos
Autores: Guerrero, Lorna, Da Silva, Cristopher, Barahona, Andrea, Montalvo, Silvio, Huiliñir, César, Borja Padilla, Rafael, Peirano, Clio, Toledo, Mario, Carvajal, Andrea
Tipo de documento: artigo
Data de publicação:2019
País:España
Recursos:Consejo Superior de Investigaciones Científicas (CSIC)
Repositório:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/200697
Acesso em linha:http://hdl.handle.net/10261/200697
Access Level:Acceso aberto
Palavra-chave:Anaerobic degradation
Fly ash
Kinetics
Methane
Metals
Secondary sludge
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spelling Fly ash as stimulant for anaerobic digestion: effect over hydrolytic stage and methane generation rateGuerrero, LornaDa Silva, CristopherBarahona, AndreaMontalvo, SilvioHuiliñir, CésarBorja Padilla, RafaelPeirano, ClioToledo, MarioCarvajal, AndreaAnaerobic degradationFly ashKineticsMethaneMetalsSecondary sludgeThermoelectric fly ash was used as a micronutrient source for microorganisms in the anaerobic digestion process of thermally pretreated (1 hour, 120 °C) secondary sludge. The obtained results not only suggest that fly ash improves methane generation in the conversion of volatile fatty acids into methane, but also show a new observation, that the fly ash contributes in the particulate organic solubilization. The maximum methane production rate increased from 6.52 mL/L/d to 22.59 mL/L/d when fly ash was added at a dosage of 150 mg/L in biochemical methane potential tests compared with tests with no added ash. Additionally, the kinetic constants of the hydrolysis of particulate organic matter were obtained in both cases (with and without added ash) in batch reactors using a first-order kinetic model; in the case of no addition, the first-order kinetic parameter was 0.019 ± 0.002 d−1, while with ashes this value increased to 0.045 ± 0.000 d−1. Therefore, the addition of fly ash improves methane generation and hydrolytic kinetics in different orders of magnitude.Peer reviewedIWA PublishingConsejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]202020202019info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501http://hdl.handle.net/10261/200697reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Ingléshttp://dx.doi.org/10.2166/wst.2019.391Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/2006972026-05-22T06:33:51Z
dc.title.none.fl_str_mv Fly ash as stimulant for anaerobic digestion: effect over hydrolytic stage and methane generation rate
title Fly ash as stimulant for anaerobic digestion: effect over hydrolytic stage and methane generation rate
spellingShingle Fly ash as stimulant for anaerobic digestion: effect over hydrolytic stage and methane generation rate
Guerrero, Lorna
Anaerobic degradation
Fly ash
Kinetics
Methane
Metals
Secondary sludge
title_short Fly ash as stimulant for anaerobic digestion: effect over hydrolytic stage and methane generation rate
title_full Fly ash as stimulant for anaerobic digestion: effect over hydrolytic stage and methane generation rate
title_fullStr Fly ash as stimulant for anaerobic digestion: effect over hydrolytic stage and methane generation rate
title_full_unstemmed Fly ash as stimulant for anaerobic digestion: effect over hydrolytic stage and methane generation rate
title_sort Fly ash as stimulant for anaerobic digestion: effect over hydrolytic stage and methane generation rate
dc.creator.none.fl_str_mv Guerrero, Lorna
Da Silva, Cristopher
Barahona, Andrea
Montalvo, Silvio
Huiliñir, César
Borja Padilla, Rafael
Peirano, Clio
Toledo, Mario
Carvajal, Andrea
author Guerrero, Lorna
author_facet Guerrero, Lorna
Da Silva, Cristopher
Barahona, Andrea
Montalvo, Silvio
Huiliñir, César
Borja Padilla, Rafael
Peirano, Clio
Toledo, Mario
Carvajal, Andrea
author_role author
author2 Da Silva, Cristopher
Barahona, Andrea
Montalvo, Silvio
Huiliñir, César
Borja Padilla, Rafael
Peirano, Clio
Toledo, Mario
Carvajal, Andrea
author2_role author
author
author
author
author
author
author
author
dc.contributor.none.fl_str_mv Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Anaerobic degradation
Fly ash
Kinetics
Methane
Metals
Secondary sludge
topic Anaerobic degradation
Fly ash
Kinetics
Methane
Metals
Secondary sludge
description Thermoelectric fly ash was used as a micronutrient source for microorganisms in the anaerobic digestion process of thermally pretreated (1 hour, 120 °C) secondary sludge. The obtained results not only suggest that fly ash improves methane generation in the conversion of volatile fatty acids into methane, but also show a new observation, that the fly ash contributes in the particulate organic solubilization. The maximum methane production rate increased from 6.52 mL/L/d to 22.59 mL/L/d when fly ash was added at a dosage of 150 mg/L in biochemical methane potential tests compared with tests with no added ash. Additionally, the kinetic constants of the hydrolysis of particulate organic matter were obtained in both cases (with and without added ash) in batch reactors using a first-order kinetic model; in the case of no addition, the first-order kinetic parameter was 0.019 ± 0.002 d−1, while with ashes this value increased to 0.045 ± 0.000 d−1. Therefore, the addition of fly ash improves methane generation and hydrolytic kinetics in different orders of magnitude.
publishDate 2019
dc.date.none.fl_str_mv 2019
2020
2020
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
format article
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/200697
url http://hdl.handle.net/10261/200697
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv http://dx.doi.org/10.2166/wst.2019.391
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv IWA Publishing
publisher.none.fl_str_mv IWA Publishing
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
_version_ 1869415634525224960
score 15,812429

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