Optimization of guava juice wastewater electrochemical treatment

Detalhes bibliográficos
Autor(a) principal: Santos, Gilmar dos
Data de Publicação: 2021
Outros Autores: Silva, Joel Marques da, Villegas-Aragón, Javier Alonso, Costa, Silvanio Silvério Lopes da, Palomino-Romero, Joel Alonso
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Research, Society and Development
Texto Completo: https://rsdjournal.org/index.php/rsd/article/view/12474
Resumo: Wastewater from guava juice production was treated by two electrochemical processes: Electroflotation (EF) and Electrocoagulation (EC). Using Box-Behnken experimental design, these processes were optimized in order to find the values of treatment time, initial pH and current density that lead to the maximum chemical oxygen demand (COD) removal efficiencies. Aluminum electrodes were used in EC treatment and an iron cathode and a ruthenium dioxide / titanium dioxide anode were applied in EF treatment. EC treatment resulted in maximum COD removal of 60%, when treating the wastewater for 40 minutes, with initial pH 4.5 and current density of 35 A/m2. On the other hand, EF only removed 25% of the wastewater COD (treatment time 40 minutes, initial pH 7.0 and current density 45 A/m2). Aluminum sulfate addition improved the wastewater conductivity, lowering electricity consumption rates. Moreover, the treatment combining EF and this chemical coagulant lead to better results than the ones found when using EF alone.
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spelling Optimization of guava juice wastewater electrochemical treatmentOptimización del tratamiento electroquímico del efluente de jugo de guayabaOtimização do tratamento eletroquímico do efluente de suco de goiabaEletroflotaçãoEletrocoagulaçãoSulfato de alumínio.ElectroflotaciónElectrocoagulaciónSulfato de aluminio.ElectroflotationElectrocoagulationAluminum sulphate.Wastewater from guava juice production was treated by two electrochemical processes: Electroflotation (EF) and Electrocoagulation (EC). Using Box-Behnken experimental design, these processes were optimized in order to find the values of treatment time, initial pH and current density that lead to the maximum chemical oxygen demand (COD) removal efficiencies. Aluminum electrodes were used in EC treatment and an iron cathode and a ruthenium dioxide / titanium dioxide anode were applied in EF treatment. EC treatment resulted in maximum COD removal of 60%, when treating the wastewater for 40 minutes, with initial pH 4.5 and current density of 35 A/m2. On the other hand, EF only removed 25% of the wastewater COD (treatment time 40 minutes, initial pH 7.0 and current density 45 A/m2). Aluminum sulfate addition improved the wastewater conductivity, lowering electricity consumption rates. Moreover, the treatment combining EF and this chemical coagulant lead to better results than the ones found when using EF alone.El efluente resultante de la producción de jugo de guayaba fue tratado por los procesos de electrocoagulación (EC) y electroflotación (EF). Utilizando la planificación experimental Box-Behnken, estos procesos se optimizaron para poder encontrar los valores de tiempo de tratamiento, pH inicial y densidad de corriente que lleven a obtener la máxima reducción de la demanda química de oxigeno (DQO). En el proceso de EC se utilizaron electrodos de aluminio, mientras que en el proceso de EF utilizaron un cátodo de hierro y un ánodo de dióxido de titanio / dióxido de rutenio. El efluente tratado por EC obtuvo una eficacia máxima de reducción de la DQO de 60%, con tiempo de tratamiento de 40 minutos, pH inicial de 4,5 y densidad de corriente de 3,5 mA/cm2. Por otro lado, con el proceso de EF se obtuvo una reducción de DQO de 25% cuando se trató el efluente por 40 minutos, con pH inicial de 7,0 y aplicando-se una densidad de corriente de 4,5 mA/cm2. La adición de sulfato de aluminio mejoró la conductividad del efluente, disminuyendo la demanda eléctrica. La combinación del proceso de EF con este coagulante químico llevó a obtener mejores resultados, si los comparamos a los obtenidos sólo por el proceso de EF.O efluente gerado na produção de suco de goiaba foi tratado por dois processos eletroquímicos: Eletroflotação (EF) e Eletrocoagulação (EC). Utilizando o planejamento experimental Box-Behnken, estes processos foram otimizados para poder encontrar os valores de tempo de tratamento, pH inicial e densidade de corrente que conduzam à obtenção da máxima remoção da demanda química de oxigênio (DQO). No processo de EC foram empregados eletrodos de alumínio, enquanto que no processo de EF foram utilizados um cátodo de ferro e um ânodo de dióxido de titânio / dióxido de rutênio. O tratamento do efluente por EC resultou em eficiência máxima de 60% na redução da DQO, com tempo de tratamento de 40 minutos, pH inicial de 4,5 e densidade de corrente de 3,5 mA/cm2. Por outro lado, no processo de EF foi obtida uma remoção de DQO de 25% ao se tratar o efluente por 40 minutos, com pH inicial de 7,0 e aplicando-se uma densidade de corrente de 4,5 mA/cm2. A adição do sulfato de alumínio melhorou a condutividade do efluente, reduzindo a demanda elétrica. A combinação do processo de EF com este coagulante químico conduziu à obtenção de melhores resultados se comparados aos obtidos unicamente pelo processo de EF.Research, Society and Development2021-02-21info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://rsdjournal.org/index.php/rsd/article/view/1247410.33448/rsd-v10i2.12474Research, Society and Development; Vol. 10 No. 2; e41910212474Research, Society and Development; Vol. 10 Núm. 2; e41910212474Research, Society and Development; v. 10 n. 2; e419102124742525-3409reponame:Research, Society and Developmentinstname:Universidade Federal de Itajubá (UNIFEI)instacron:UNIFEIenghttps://rsdjournal.org/index.php/rsd/article/view/12474/11428Copyright (c) 2021 Gilmar dos Santos; Joel Marques da Silva; Javier Alonso Villegas-Aragón; Silvanio Silvério Lopes da Costa; Joel Alonso Palomino-Romerohttps://creativecommons.org/licenses/by/4.0info:eu-repo/semantics/openAccessSantos, Gilmar dosSilva, Joel Marques daVillegas-Aragón, Javier AlonsoCosta, Silvanio Silvério Lopes daPalomino-Romero, Joel Alonso2021-03-02T09:32:39Zoai:ojs.pkp.sfu.ca:article/12474Revistahttps://rsdjournal.org/index.php/rsd/indexPUBhttps://rsdjournal.org/index.php/rsd/oairsd.articles@gmail.com2525-34092525-3409opendoar:2024-01-17T09:34:02.584049Research, Society and Development - Universidade Federal de Itajubá (UNIFEI)false
dc.title.none.fl_str_mv Optimization of guava juice wastewater electrochemical treatment
Optimización del tratamiento electroquímico del efluente de jugo de guayaba
Otimização do tratamento eletroquímico do efluente de suco de goiaba
title Optimization of guava juice wastewater electrochemical treatment
spellingShingle Optimization of guava juice wastewater electrochemical treatment
Santos, Gilmar dos
Eletroflotação
Eletrocoagulação
Sulfato de alumínio.
Electroflotación
Electrocoagulación
Sulfato de aluminio.
Electroflotation
Electrocoagulation
Aluminum sulphate.
title_short Optimization of guava juice wastewater electrochemical treatment
title_full Optimization of guava juice wastewater electrochemical treatment
title_fullStr Optimization of guava juice wastewater electrochemical treatment
title_full_unstemmed Optimization of guava juice wastewater electrochemical treatment
title_sort Optimization of guava juice wastewater electrochemical treatment
author Santos, Gilmar dos
author_facet Santos, Gilmar dos
Silva, Joel Marques da
Villegas-Aragón, Javier Alonso
Costa, Silvanio Silvério Lopes da
Palomino-Romero, Joel Alonso
author_role author
author2 Silva, Joel Marques da
Villegas-Aragón, Javier Alonso
Costa, Silvanio Silvério Lopes da
Palomino-Romero, Joel Alonso
author2_role author
author
author
author
dc.contributor.author.fl_str_mv Santos, Gilmar dos
Silva, Joel Marques da
Villegas-Aragón, Javier Alonso
Costa, Silvanio Silvério Lopes da
Palomino-Romero, Joel Alonso
dc.subject.por.fl_str_mv Eletroflotação
Eletrocoagulação
Sulfato de alumínio.
Electroflotación
Electrocoagulación
Sulfato de aluminio.
Electroflotation
Electrocoagulation
Aluminum sulphate.
topic Eletroflotação
Eletrocoagulação
Sulfato de alumínio.
Electroflotación
Electrocoagulación
Sulfato de aluminio.
Electroflotation
Electrocoagulation
Aluminum sulphate.
description Wastewater from guava juice production was treated by two electrochemical processes: Electroflotation (EF) and Electrocoagulation (EC). Using Box-Behnken experimental design, these processes were optimized in order to find the values of treatment time, initial pH and current density that lead to the maximum chemical oxygen demand (COD) removal efficiencies. Aluminum electrodes were used in EC treatment and an iron cathode and a ruthenium dioxide / titanium dioxide anode were applied in EF treatment. EC treatment resulted in maximum COD removal of 60%, when treating the wastewater for 40 minutes, with initial pH 4.5 and current density of 35 A/m2. On the other hand, EF only removed 25% of the wastewater COD (treatment time 40 minutes, initial pH 7.0 and current density 45 A/m2). Aluminum sulfate addition improved the wastewater conductivity, lowering electricity consumption rates. Moreover, the treatment combining EF and this chemical coagulant lead to better results than the ones found when using EF alone.
publishDate 2021
dc.date.none.fl_str_mv 2021-02-21
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv https://rsdjournal.org/index.php/rsd/article/view/12474
10.33448/rsd-v10i2.12474
url https://rsdjournal.org/index.php/rsd/article/view/12474
identifier_str_mv 10.33448/rsd-v10i2.12474
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv https://rsdjournal.org/index.php/rsd/article/view/12474/11428
dc.rights.driver.fl_str_mv https://creativecommons.org/licenses/by/4.0
info:eu-repo/semantics/openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by/4.0
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Research, Society and Development
publisher.none.fl_str_mv Research, Society and Development
dc.source.none.fl_str_mv Research, Society and Development; Vol. 10 No. 2; e41910212474
Research, Society and Development; Vol. 10 Núm. 2; e41910212474
Research, Society and Development; v. 10 n. 2; e41910212474
2525-3409
reponame:Research, Society and Development
instname:Universidade Federal de Itajubá (UNIFEI)
instacron:UNIFEI
instname_str Universidade Federal de Itajubá (UNIFEI)
instacron_str UNIFEI
institution UNIFEI
reponame_str Research, Society and Development
collection Research, Society and Development
repository.name.fl_str_mv Research, Society and Development - Universidade Federal de Itajubá (UNIFEI)
repository.mail.fl_str_mv rsd.articles@gmail.com
_version_ 1797052745606234112

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