Modelling of a wastewater treatment plant using GPS-X

Detalhes bibliográficos
Autor(a) principal: Pereira, Sofia Filipe
Data de Publicação: 2014
Tipo de documento: Dissertação
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10362/13621
Resumo: Dissertation to obtain the degree of Master in Chemical and Biochemical Engineering
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spelling Modelling of a wastewater treatment plant using GPS-XPulp and paper effluentsActivated sludge processModellingCalibrationUreaDissertation to obtain the degree of Master in Chemical and Biochemical EngineeringThe work present in this thesis was conducted in Portucel Soporcel mill, in the industrial complex of Setúbal, and had as main objective the modelling of the treatment process of the effluents from this industry, using for this purpose the software GPS-X. This program has a clear-cut graphical interface and uses a specialized translator that converts the graphical process into material balance equations, based on dynamic models. These models allow, besides the kinetic descripton of the treatment process carried out at the WWTP, to simulate new scenarios towards the study of critical parameters for the process as well as optimization and control of the WWTP. The effluent that arrives to Portucel’s WWTP, from the pulp and paper mills of the complex, is particularly rich on fibers (solids), lignin, chlorinated and sulphur compounds, resin acids, phenols and starch. It has a brown colour due to the presence of lignin and has a high oxygen chemical demand (about 1,095 g O2/m3). The WWTP uses the activated sludge process with extended aeration. This method allows an efficient removal of organics at the same time as it minimizes the sludge production. For the modelling of the process it was necessary to collect historical data related to the WWTP’s performance over the last 3 years. This data was used as input values for the influent characterisation and as output values to achieve the treated effluent characterisation. Since the first simulation did not lead to the desired output results, it was necessary to proceed to the model calibration, by means of a more detailed study concerning the nutrient and organic fractions of the influent. Once the model was calibrated, a study of the urea flowrate was conducted. The urea is added to the influent, before the beginning of the biological oxidation, as a way to satisfy the nitrogen requirements along the treatment process. However, this flowrate was never submitted to a study that evaluated, in a higher detail, the effective requirements of this nutrient. Thus, some simulations were done using the software, by decreasing successively the value of the urea flowrate and the results obtained were analyzed. Furthermore, these simulations were validated in the WWTP itself, at Portucel, through the decrease of the urea flowrate to half the normal value. Both the simulations and Portucel’s results showed that, actually, the addition of urea is not necessary because it does not affect the treatment process in a significant way, namely in terms of the removal of chemical oxygen demand. The simulations have also showed that the concentration of nitrogen in the final effluent diminishes significantly with the reduction of the urea flowrate, which could be advantageous in an environmental point of view.Faculdade de Ciências e TecnologiaFigueira, HenriqueOehmen, AdrianReis, Maria d'AscensãoRUNPereira, Sofia Filipe2014-11-05T11:22:56Z20142014-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisapplication/pdfhttp://hdl.handle.net/10362/13621enginfo: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:RCAAP2024-03-11T03:48:20Zoai:run.unl.pt:10362/13621Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T03:21:19.157401Repositório 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 Modelling of a wastewater treatment plant using GPS-X
title Modelling of a wastewater treatment plant using GPS-X
spellingShingle Modelling of a wastewater treatment plant using GPS-X
Pereira, Sofia Filipe
Pulp and paper effluents
Activated sludge process
Modelling
Calibration
Urea
title_short Modelling of a wastewater treatment plant using GPS-X
title_full Modelling of a wastewater treatment plant using GPS-X
title_fullStr Modelling of a wastewater treatment plant using GPS-X
title_full_unstemmed Modelling of a wastewater treatment plant using GPS-X
title_sort Modelling of a wastewater treatment plant using GPS-X
author Pereira, Sofia Filipe
author_facet Pereira, Sofia Filipe
author_role author
dc.contributor.none.fl_str_mv Figueira, Henrique
Oehmen, Adrian
Reis, Maria d'Ascensão
RUN
dc.contributor.author.fl_str_mv Pereira, Sofia Filipe
dc.subject.por.fl_str_mv Pulp and paper effluents
Activated sludge process
Modelling
Calibration
Urea
topic Pulp and paper effluents
Activated sludge process
Modelling
Calibration
Urea
description Dissertation to obtain the degree of Master in Chemical and Biochemical Engineering
publishDate 2014
dc.date.none.fl_str_mv 2014-11-05T11:22:56Z
2014
2014-01-01T00:00:00Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/masterThesis
format masterThesis
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://hdl.handle.net/10362/13621
url http://hdl.handle.net/10362/13621
dc.language.iso.fl_str_mv eng
language eng
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 Faculdade de Ciências e Tecnologia
publisher.none.fl_str_mv Faculdade de Ciências e Tecnologia
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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