A modified method to determine biomass concentration as COD in pure cultures and in activated sludge systems

A simple technique to determine biomass concentration as chemical oxygen demand (COD) was developed as an alternative to the standard volatile suspended solid (VSS) method. The proposed technique for biomass measurement as COD is based on the determination of the biomass COD (CODB) as the difference...

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Autores: Contreras, Edgardo Martín, Bértola, Nora Cristina, Giannuzzi, Leda, Zaritzky, Noemí Elisabet
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2002
País:Argentina
Institución:Universidad Nacional de La Plata
Repositorio:SEDICI (UNLP)
Idioma:inglés
OAI Identifier:oai:sedici.unlp.edu.ar:10915/83419
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/83419
Access Level:acceso abierto
Palabra clave:Química
biomass
chemical oxygen demand
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spelling A modified method to determine biomass concentration as COD in pure cultures and in activated sludge systemsContreras, Edgardo MartínBértola, Nora CristinaGiannuzzi, LedaZaritzky, Noemí ElisabetQuímicabiomasschemical oxygen demandA simple technique to determine biomass concentration as chemical oxygen demand (COD) was developed as an alternative to the standard volatile suspended solid (VSS) method. The proposed technique for biomass measurement as COD is based on the determination of the biomass COD (CODB) as the difference between total COD (CODT) and the soluble COD (CODS) of the sample. The obtained results show that this technique was quicker and simpler than the traditional VSS method. The validity of the proposed methods was tested with pure cultures of a filamentous micro-organisms (Sphaerotilus natans), a floc-forming bacteria and activated sludges. The method was also used for estimating the conversion factor (fCV) from VSS to COD units. A modification of the standard VSS technique was also proposed using two membranes in the filtration device; this technique allowed the biomass determination in 1 μm size bacteria cultures that cannot be detected by the standard VSS method because cells are not retained by the 1.5 μm diameter pore glass-fibre filter.Facultad de IngenieríaCentro de Investigación y Desarrollo en Criotecnología de Alimentos2002info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf463-467http://sedici.unlp.edu.ar/handle/10915/83419enginfo:eu-repo/semantics/altIdentifier/issn/0378-4738info:eu-repo/semantics/altIdentifier/doi/10.4314/wsa.v28i4.4920info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-sa/4.0/Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2024-05-08T12:53:54Zoai:sedici.unlp.edu.ar:10915/83419Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292024-05-08 12:53:54.933SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv A modified method to determine biomass concentration as COD in pure cultures and in activated sludge systems
title A modified method to determine biomass concentration as COD in pure cultures and in activated sludge systems
spellingShingle A modified method to determine biomass concentration as COD in pure cultures and in activated sludge systems
Contreras, Edgardo Martín
Química
biomass
chemical oxygen demand
title_short A modified method to determine biomass concentration as COD in pure cultures and in activated sludge systems
title_full A modified method to determine biomass concentration as COD in pure cultures and in activated sludge systems
title_fullStr A modified method to determine biomass concentration as COD in pure cultures and in activated sludge systems
title_full_unstemmed A modified method to determine biomass concentration as COD in pure cultures and in activated sludge systems
title_sort A modified method to determine biomass concentration as COD in pure cultures and in activated sludge systems
dc.creator.none.fl_str_mv Contreras, Edgardo Martín
Bértola, Nora Cristina
Giannuzzi, Leda
Zaritzky, Noemí Elisabet
author Contreras, Edgardo Martín
author_facet Contreras, Edgardo Martín
Bértola, Nora Cristina
Giannuzzi, Leda
Zaritzky, Noemí Elisabet
author_role author
author2 Bértola, Nora Cristina
Giannuzzi, Leda
Zaritzky, Noemí Elisabet
author2_role author
author
author
dc.subject.none.fl_str_mv Química
biomass
chemical oxygen demand
topic Química
biomass
chemical oxygen demand
description A simple technique to determine biomass concentration as chemical oxygen demand (COD) was developed as an alternative to the standard volatile suspended solid (VSS) method. The proposed technique for biomass measurement as COD is based on the determination of the biomass COD (CODB) as the difference between total COD (CODT) and the soluble COD (CODS) of the sample. The obtained results show that this technique was quicker and simpler than the traditional VSS method. The validity of the proposed methods was tested with pure cultures of a filamentous micro-organisms (Sphaerotilus natans), a floc-forming bacteria and activated sludges. The method was also used for estimating the conversion factor (fCV) from VSS to COD units. A modification of the standard VSS technique was also proposed using two membranes in the filtration device; this technique allowed the biomass determination in 1 μm size bacteria cultures that cannot be detected by the standard VSS method because cells are not retained by the 1.5 μm diameter pore glass-fibre filter.
publishDate 2002
dc.date.none.fl_str_mv 2002
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
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info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://sedici.unlp.edu.ar/handle/10915/83419
url http://sedici.unlp.edu.ar/handle/10915/83419
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/issn/0378-4738
info:eu-repo/semantics/altIdentifier/doi/10.4314/wsa.v28i4.4920
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
dc.format.none.fl_str_mv application/pdf
463-467
dc.source.none.fl_str_mv reponame:SEDICI (UNLP)
instname:Universidad Nacional de La Plata
instacron:UNLP
instname_str Universidad Nacional de La Plata
instacron_str UNLP
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collection SEDICI (UNLP)
repository.name.fl_str_mv SEDICI (UNLP) - Universidad Nacional de La Plata
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