Perdas de carga em filtros rápidos de fluxo ascendente e descendente
The following study of the head loss in filters, whether of upstream or downstream flow, is of main importance in the projection and mainly in the operational control of such units in a water treatment plant (WTP). However, its mathematical prediction modeling is still relatively unsatisfactory due...
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Tratamento de água Water treatment Filtração rápida Fast filtration Taxa de filtração Filtration rate Dupla filtração Double filtration |
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Tratamento de água Water treatment Filtração rápida Fast filtration Taxa de filtração Filtration rate Dupla filtração Double filtration Araújo, Ygo Magno de Perdas de carga em filtros rápidos de fluxo ascendente e descendente |
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The following study of the head loss in filters, whether of upstream or downstream flow, is of main importance in the projection and mainly in the operational control of such units in a water treatment plant (WTP). However, its mathematical prediction modeling is still relatively unsatisfactory due to the different intrinsic variables in the filtration efficiency process, such as filtration mechanisms, previous treatment processes, filtration rate and, above all, composition and grain size filter media. This paper presents the study of the charge losses in double filtration treatability tests carried out in a pilot dual filtration system (PDFS), in order to evaluate the influence of the granulometry of the filter layers on the upstream and downstream filters and applied rates in the variation of laminar and turbulent head loss with the retention of impurities that is interpreted in the turbidity. It were performed four 24-hour duration tests, which were tested one upstream filter gravel (UFG) and then three quick sand downflow filters (SDF) with varying particle sizes to each other, preceded by pre-oxidation and coagulation, with variation of filtration rates of 230 and 255 m³ / m².day and 310 and 340 m³ / m².day, respectively. The results of the PDFS samples show that the UFG had great efficiency in the removal of turbidity with loss of load influenced by the false bottom, since the SDF evidence that the lower the granulometry of the filters, the greater the efficiency of removal of impurities, loss of load and less filtration career. The SDF 3 was chosen because of operational issues, as the remaining turbidities of the SDF were close. Closing the following paper, the increase of the applied filtration rates conferred increase of the loss of load and decreases of the removal of impurities and filtering career. |
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Tinôco, Juliana Delgado |
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Tinôco, Juliana Delgado Araújo, Ygo Magno de |
| format |
bachelorThesis |
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Araújo, Ygo Magno de |
| author_sort |
Araújo, Ygo Magno de |
| title |
Perdas de carga em filtros rápidos de fluxo ascendente e descendente |
| title_short |
Perdas de carga em filtros rápidos de fluxo ascendente e descendente |
| title_full |
Perdas de carga em filtros rápidos de fluxo ascendente e descendente |
| title_fullStr |
Perdas de carga em filtros rápidos de fluxo ascendente e descendente |
| title_full_unstemmed |
Perdas de carga em filtros rápidos de fluxo ascendente e descendente |
| title_sort |
perdas de carga em filtros rápidos de fluxo ascendente e descendente |
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Universidade Federal do Rio Grande do Norte |
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2018 |
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https://repositorio.ufrn.br/handle/123456789/40451 |
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AT araujoygomagnode perdasdecargaemfiltrosrapidosdefluxoascendenteedescendente |
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1773960585804775424 |
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ri-123456789-404512021-09-29T14:26:26Z Perdas de carga em filtros rápidos de fluxo ascendente e descendente Araújo, Ygo Magno de Tinôco, Juliana Delgado Marco Antonio Calazans Duarte Tratamento de água Water treatment Filtração rápida Fast filtration Taxa de filtração Filtration rate Dupla filtração Double filtration The following study of the head loss in filters, whether of upstream or downstream flow, is of main importance in the projection and mainly in the operational control of such units in a water treatment plant (WTP). However, its mathematical prediction modeling is still relatively unsatisfactory due to the different intrinsic variables in the filtration efficiency process, such as filtration mechanisms, previous treatment processes, filtration rate and, above all, composition and grain size filter media. This paper presents the study of the charge losses in double filtration treatability tests carried out in a pilot dual filtration system (PDFS), in order to evaluate the influence of the granulometry of the filter layers on the upstream and downstream filters and applied rates in the variation of laminar and turbulent head loss with the retention of impurities that is interpreted in the turbidity. It were performed four 24-hour duration tests, which were tested one upstream filter gravel (UFG) and then three quick sand downflow filters (SDF) with varying particle sizes to each other, preceded by pre-oxidation and coagulation, with variation of filtration rates of 230 and 255 m³ / m².day and 310 and 340 m³ / m².day, respectively. The results of the PDFS samples show that the UFG had great efficiency in the removal of turbidity with loss of load influenced by the false bottom, since the SDF evidence that the lower the granulometry of the filters, the greater the efficiency of removal of impurities, loss of load and less filtration career. The SDF 3 was chosen because of operational issues, as the remaining turbidities of the SDF were close. Closing the following paper, the increase of the applied filtration rates conferred increase of the loss of load and decreases of the removal of impurities and filtering career. O estudo da perda de carga em filtros, sejam eles de fluxos ascendente ou descendente, tem fundamental importância na projeção e, principalmente, no controle operacional de tais unidades em uma estação de tratamento de água (ETA). Entretanto, sua modelação matemática de previsão ainda é, relativamente, insatisfatória devido as diversas variáveis intrínsecas no processo de eficiência da filtração, como os mecanismos de filtração, os processos de tratamento anteriores, a taxa de filtração e, sobretudo, a composição e granulometria do meio filtrante. Diante disso, este artigo traz o estudo das perdas de carga em ensaios de tratabilidade de dupla filtração realizados em uma instalação piloto de dupla filtração (IPDF), com o objetivo de avaliar a influência das granulometrias das camadas filtrantes nos filtros de escoamentos ascendente e descendente e taxas aplicadas na variação da perda de carga laminar e turbulenta com a retenção de impurezas que se interpreta na turbidez. Foram realizados quatro ensaios de 24 h de duração, onde foram testados um filtro de fluxo ascendente de pedregulho (FAP) e, em seguida, três filtros rápidos de fluxo descendente de areia (FDA) com granulometrias variadas entre si, antecedidos de pré-oxidação e coagulação, com variação das taxas de filtração de 230 e 255 m³/m².dia e 310 e 340 m³/m².dia, respectivamente. Os resultados das amostras da IPDF apresentam que o FAP teve grande eficiência na remoção de turbidez com perda de carga influenciada pelo fundo falso, já os FDA evidenciam que quanto menor a granulometria dos filtros, maiores são a eficiência de remoção de impurezas e perda de carga e menor a carreira de filtração. O FDA 3 foi escolhido devido questões operacionais, visto que as turbidezes remanescentes dos FDA eram próximas. Por fim, o aumento das taxas de filtração aplicadas conferiu crescimento da perda de carga e diminuição da remoção de impurezas e carreira de filtração. 2018-07-09T17:34:09Z 2021-09-29T14:26:26Z 2018-07-09T17:34:09Z 2021-09-29T14:26:26Z 2018 bachelorThesis 2013085340 ARAUJO, Ygo Magno de. Perdas de carga em filtros rápidos de fluxo ascendente e descendente. 2018. 20 f. Artigo Científico - Trabalho de Conclusão de Curso (Graduação) - Curso de Engenharia Civil, Centro de Tecnologia, Universidade Federal do Rio Grande do Norte, Natal, 2018. https://repositorio.ufrn.br/handle/123456789/40451 pt_BR openAccess application/pdf Universidade Federal do Rio Grande do Norte Brasil UFRN Engenharia Civil |