Innovative design and operational strategies to improve CO2 mass transfer during photosynthetic biogas upgrading

Photosynthetic biogas upgrading in algal-bacterial photobioreactors represents a cost-effective and environmentally friendly process for simultaneously removing CO2 and H2S from biogas. Recent research has focused on process optimization for high performance of photosynthetic biogas upgrading. Previ...

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Detalles Bibliográficos
Autor: Kuri, Rentaro
Tipo de recurso: tesis de maestría
Fecha de publicación:2023
País:España
Institución:Universidad de Valladolid
Repositorio:UVaDOC. Repositorio Documental de la Universidad de Valladolid
OAI Identifier:oai:uvadoc.uva.es:10324/61620
Acceso en línea:https://uvadoc.uva.es/handle/10324/61620
Access Level:acceso abierto
Palabra clave:Algal-bacterial photobioreactor
Biomethane quality
CO2 mass transfer
Liquid nanoparticles
Photosynthetic biogas upgrading
3308 Ingeniería y Tecnología del Medio Ambiente
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spelling Innovative design and operational strategies to improve CO2 mass transfer during photosynthetic biogas upgradingKuri, RentaroAlgal-bacterial photobioreactorBiomethane qualityCO2 mass transferLiquid nanoparticlesPhotosynthetic biogas upgrading3308 Ingeniería y Tecnología del Medio AmbientePhotosynthetic biogas upgrading in algal-bacterial photobioreactors represents a cost-effective and environmentally friendly process for simultaneously removing CO2 and H2S from biogas. Recent research has focused on process optimization for high performance of photosynthetic biogas upgrading. Previous studies revealed that maintaining a high pH in the medium in a biogas absorption column allowed for consistent and significant CO2 removals. Therefore, innovative operating strategies to achieve such conditions are needed to improve biomethane quality. In this study, six operational strategies were evaluated to enhance CO2 mass transfer in a biogas absorption column: ⅰ) internal gas recirculation, ⅱ) direct centrate feeding to the column, an increase of pH in the centrate/digestate ⅲ) with and ⅳ) without ammonium stripping and ⅴ) an addition of liquid nanoparticles (NPs). The simultaneous implementation of strategies ⅲ) and ⅳ) in combination with ⅱ) managed to reduce the CO2 concentration from 29.5% to 5.7% and 2.5% and increase the CH4 concentration in the biomethane from 70% to 91.3% and 94.3%, respectively, which fulfilled with the current legislation on the use of biogas as vehicle fuel. The addition of NPs in the culture broth boosted photosynthetic activity, resulting in an increase in biomass concentration from 1.32 to 3.48 g VSS L-1. However, the higher biomass concentration reduced light penetration in the cultivation broth, which induced a limitation in the photosynthetic activity.Departamento de Ingeniería Química y Tecnología del Medio AmbienteMáster en Ingeniería AmbientalHoyos Durán, Edwin GilbertMuñoz Torre, RaúlUniversidad de Valladolid. Escuela de Ingenierías Industriales2023info:eu-repo/semantics/masterThesisapplication/pdfhttps://uvadoc.uva.es/handle/10324/61620reponame:UVaDOC. Repositorio Documental de la Universidad de Valladolidinstname:Universidad de ValladolidInglésinfo:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-nd/4.0/oai:uvadoc.uva.es:10324/616202026-06-13T12:44:47Z
dc.title.none.fl_str_mv Innovative design and operational strategies to improve CO2 mass transfer during photosynthetic biogas upgrading
title Innovative design and operational strategies to improve CO2 mass transfer during photosynthetic biogas upgrading
spellingShingle Innovative design and operational strategies to improve CO2 mass transfer during photosynthetic biogas upgrading
Kuri, Rentaro
Algal-bacterial photobioreactor
Biomethane quality
CO2 mass transfer
Liquid nanoparticles
Photosynthetic biogas upgrading
3308 Ingeniería y Tecnología del Medio Ambiente
title_short Innovative design and operational strategies to improve CO2 mass transfer during photosynthetic biogas upgrading
title_full Innovative design and operational strategies to improve CO2 mass transfer during photosynthetic biogas upgrading
title_fullStr Innovative design and operational strategies to improve CO2 mass transfer during photosynthetic biogas upgrading
title_full_unstemmed Innovative design and operational strategies to improve CO2 mass transfer during photosynthetic biogas upgrading
title_sort Innovative design and operational strategies to improve CO2 mass transfer during photosynthetic biogas upgrading
dc.creator.none.fl_str_mv Kuri, Rentaro
author Kuri, Rentaro
author_facet Kuri, Rentaro
author_role author
dc.contributor.none.fl_str_mv Hoyos Durán, Edwin Gilbert
Muñoz Torre, Raúl
Universidad de Valladolid. Escuela de Ingenierías Industriales
dc.subject.none.fl_str_mv Algal-bacterial photobioreactor
Biomethane quality
CO2 mass transfer
Liquid nanoparticles
Photosynthetic biogas upgrading
3308 Ingeniería y Tecnología del Medio Ambiente
topic Algal-bacterial photobioreactor
Biomethane quality
CO2 mass transfer
Liquid nanoparticles
Photosynthetic biogas upgrading
3308 Ingeniería y Tecnología del Medio Ambiente
description Photosynthetic biogas upgrading in algal-bacterial photobioreactors represents a cost-effective and environmentally friendly process for simultaneously removing CO2 and H2S from biogas. Recent research has focused on process optimization for high performance of photosynthetic biogas upgrading. Previous studies revealed that maintaining a high pH in the medium in a biogas absorption column allowed for consistent and significant CO2 removals. Therefore, innovative operating strategies to achieve such conditions are needed to improve biomethane quality. In this study, six operational strategies were evaluated to enhance CO2 mass transfer in a biogas absorption column: ⅰ) internal gas recirculation, ⅱ) direct centrate feeding to the column, an increase of pH in the centrate/digestate ⅲ) with and ⅳ) without ammonium stripping and ⅴ) an addition of liquid nanoparticles (NPs). The simultaneous implementation of strategies ⅲ) and ⅳ) in combination with ⅱ) managed to reduce the CO2 concentration from 29.5% to 5.7% and 2.5% and increase the CH4 concentration in the biomethane from 70% to 91.3% and 94.3%, respectively, which fulfilled with the current legislation on the use of biogas as vehicle fuel. The addition of NPs in the culture broth boosted photosynthetic activity, resulting in an increase in biomass concentration from 1.32 to 3.48 g VSS L-1. However, the higher biomass concentration reduced light penetration in the cultivation broth, which induced a limitation in the photosynthetic activity.
publishDate 2023
dc.date.none.fl_str_mv 2023
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dc.identifier.none.fl_str_mv https://uvadoc.uva.es/handle/10324/61620
url https://uvadoc.uva.es/handle/10324/61620
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by-nc-nd/4.0/
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by-nc-nd/4.0/
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv reponame:UVaDOC. Repositorio Documental de la Universidad de Valladolid
instname:Universidad de Valladolid
instname_str Universidad de Valladolid
reponame_str UVaDOC. Repositorio Documental de la Universidad de Valladolid
collection UVaDOC. Repositorio Documental de la Universidad de Valladolid
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