The role of food/microorganism ratio in denitrification reactors: how it affects the sizing and operation of the denitrification process

Detalhes bibliográficos
Autor(a) principal: Gavasci,Renato
Data de Publicação: 2021
Outros Autores: Lombardi,Francesco, Raboni,Massimo
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Revista Ambiente & Água
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1980-993X2021000100311
Resumo: Abstract Two calculation models of the Specific Denitrification Rate (SDNR) are analyzed to highlight the sensitivity of this parameter to the Food:Microorganisms ratio in the denitrification reactor (F:MDEN). One of these models is empirical while the second was elaborated on a deterministic basis. Both models reveal a linear dependence of SDNR20°C on F:MDEN and in a first approximation they are comparable only in a narrow range of concentration of dissolved oxygen (DO) in denitrification, specifically DO=0.25-0.35 mg L-1. These values frequently occur in well designed and well operated sewage treatment plants. Outside this range, the role of F:MDEN must necessarily be examined in combination with DO because of the relevant influence of the latter on the efficiency of the denitrification process.
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spelling The role of food/microorganism ratio in denitrification reactors: how it affects the sizing and operation of the denitrification processactivated sludgebiological processdenitrificationnitrogen removalsewage treatmentAbstract Two calculation models of the Specific Denitrification Rate (SDNR) are analyzed to highlight the sensitivity of this parameter to the Food:Microorganisms ratio in the denitrification reactor (F:MDEN). One of these models is empirical while the second was elaborated on a deterministic basis. Both models reveal a linear dependence of SDNR20°C on F:MDEN and in a first approximation they are comparable only in a narrow range of concentration of dissolved oxygen (DO) in denitrification, specifically DO=0.25-0.35 mg L-1. These values frequently occur in well designed and well operated sewage treatment plants. Outside this range, the role of F:MDEN must necessarily be examined in combination with DO because of the relevant influence of the latter on the efficiency of the denitrification process.Instituto de Pesquisas Ambientais em Bacias Hidrográficas2021-01-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1980-993X2021000100311Revista Ambiente & Água v.16 n.1 2021reponame:Revista Ambiente & Águainstname:Instituto de Pesquisas Ambientais em Bacias Hidrográficas (IPABHI)instacron:IPABHI10.4136/ambi-agua.2656info:eu-repo/semantics/openAccessGavasci,RenatoLombardi,FrancescoRaboni,Massimoeng2021-02-09T00:00:00Zoai:scielo:S1980-993X2021000100311Revistahttp://www.ambi-agua.net/PUBhttps://old.scielo.br/oai/scielo-oai.php||ambi.agua@gmail.com1980-993X1980-993Xopendoar:2021-02-09T00:00Revista Ambiente & Água - Instituto de Pesquisas Ambientais em Bacias Hidrográficas (IPABHI)false
dc.title.none.fl_str_mv The role of food/microorganism ratio in denitrification reactors: how it affects the sizing and operation of the denitrification process
title The role of food/microorganism ratio in denitrification reactors: how it affects the sizing and operation of the denitrification process
spellingShingle The role of food/microorganism ratio in denitrification reactors: how it affects the sizing and operation of the denitrification process
Gavasci,Renato
activated sludge
biological process
denitrification
nitrogen removal
sewage treatment
title_short The role of food/microorganism ratio in denitrification reactors: how it affects the sizing and operation of the denitrification process
title_full The role of food/microorganism ratio in denitrification reactors: how it affects the sizing and operation of the denitrification process
title_fullStr The role of food/microorganism ratio in denitrification reactors: how it affects the sizing and operation of the denitrification process
title_full_unstemmed The role of food/microorganism ratio in denitrification reactors: how it affects the sizing and operation of the denitrification process
title_sort The role of food/microorganism ratio in denitrification reactors: how it affects the sizing and operation of the denitrification process
author Gavasci,Renato
author_facet Gavasci,Renato
Lombardi,Francesco
Raboni,Massimo
author_role author
author2 Lombardi,Francesco
Raboni,Massimo
author2_role author
author
dc.contributor.author.fl_str_mv Gavasci,Renato
Lombardi,Francesco
Raboni,Massimo
dc.subject.por.fl_str_mv activated sludge
biological process
denitrification
nitrogen removal
sewage treatment
topic activated sludge
biological process
denitrification
nitrogen removal
sewage treatment
description Abstract Two calculation models of the Specific Denitrification Rate (SDNR) are analyzed to highlight the sensitivity of this parameter to the Food:Microorganisms ratio in the denitrification reactor (F:MDEN). One of these models is empirical while the second was elaborated on a deterministic basis. Both models reveal a linear dependence of SDNR20°C on F:MDEN and in a first approximation they are comparable only in a narrow range of concentration of dissolved oxygen (DO) in denitrification, specifically DO=0.25-0.35 mg L-1. These values frequently occur in well designed and well operated sewage treatment plants. Outside this range, the role of F:MDEN must necessarily be examined in combination with DO because of the relevant influence of the latter on the efficiency of the denitrification process.
publishDate 2021
dc.date.none.fl_str_mv 2021-01-01
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1980-993X2021000100311
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1980-993X2021000100311
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.4136/ambi-agua.2656
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv text/html
dc.publisher.none.fl_str_mv Instituto de Pesquisas Ambientais em Bacias Hidrográficas
publisher.none.fl_str_mv Instituto de Pesquisas Ambientais em Bacias Hidrográficas
dc.source.none.fl_str_mv Revista Ambiente & Água v.16 n.1 2021
reponame:Revista Ambiente & Água
instname:Instituto de Pesquisas Ambientais em Bacias Hidrográficas (IPABHI)
instacron:IPABHI
instname_str Instituto de Pesquisas Ambientais em Bacias Hidrográficas (IPABHI)
instacron_str IPABHI
institution IPABHI
reponame_str Revista Ambiente & Água
collection Revista Ambiente & Água
repository.name.fl_str_mv Revista Ambiente & Água - Instituto de Pesquisas Ambientais em Bacias Hidrográficas (IPABHI)
repository.mail.fl_str_mv ||ambi.agua@gmail.com
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