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Metadados | Descrição | Idioma |
---|---|---|
Autor(es): dc.contributor.author | JUNIOR, BENVINDO SIRTOLI GARDIMAN | - |
Autor(es): dc.contributor.author | GARCIA, GIOVANNI DE OLIVEIRA | - |
Autor(es): dc.contributor.author | REIS, EDVALDO FIALHO DOS | - |
Autor(es): dc.contributor.author | GUIMARÃES, DAMARIS | - |
Autor(es): dc.contributor.author | FREITAS, WALLISSON DA SILVA | - |
Data de aceite: dc.date.accessioned | 2023-08-08T12:27:33Z | - |
Data de disponibilização: dc.date.available | 2023-08-08T12:27:33Z | - |
Data de envio: dc.date.issued | 2023-07-24 | - |
Fonte: dc.identifier.uri | http://educapes.capes.gov.br/handle/capes/735725 | - |
Resumo: dc.description.abstract | Residual water from coffee without recirculation can cause serious impacts if released into the environment without treatment. The electrolytic technique appears as a promising alternative to minimize this damage. However, high effluent times in the reactor can make the treatment unfeasible, consuming a lot of electrical energy and increasing the wear of the electrodes. For this reason, the objective of this study was to optimize the Hydraulic Detention Time (Time) based on the removal of turbidity, Total Solids (TS) and Chemical Oxygen Demand (COD), monitoring the behavior of pH and electrical conductivity. In the experiments, a glass electrolytic reactor with a volume of 1000 cm 3 was used. Batch experiments were performed following a completely randomized design in a subscript scheme, varying the factors: plate distance (PD: 10, 20 and 30 mm) current density (CD: 25, 50, 75 and 100 A m -2 ) and hydraulic detention time of the reactor effluent (Time: 0, 60, 121, 183, 247, 312, 378, 446, 516 and 586 s). After using optimization techniques, it was found that the averages of the optimal operating conditions of the 2 monitored variables are in Time intervals of 376 seconds, 70 A m -2 of CD and 26 mm of PD, reflecting the greater removal of pollutants. The values predicted by the models generated overestimated turbidity by 59% and underestimated TS and COD by 14% and 2%, respectively. The validation in the optimized conditions, showed removal of 68.35%, 25.55% and 3.68%, for turbidity, total solids and COD, respectively. The overall electrical consumption was 1.75 kW.h m -3 , while the operational treatment cost was US$ 0.13 m -3 . Electricity represents the highest cost in electrolytic treatment, about 78.8% of the total operating cost under the conditions of the studied system, which can be reduced with the capture of photovoltaic electricity. | pt_BR |
Idioma: dc.language.iso | en | pt_BR |
Palavras-chave: dc.subject | Electroflotation | pt_BR |
Título: dc.title | Optimization and validation of an electrolytic system in the treatment of Coffee Wastewater without recirculation via Response Surface Methodology (RSM) (Atena Editora) | pt_BR |
Tipo de arquivo: dc.type | livro digital | pt_BR |
Aparece nas coleções: | Livros digitais |
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