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Master's Dissertation
DOI
https://doi.org/10.11606/D.18.2016.tde-31102016-142553
Document
Author
Full name
Donizeti de Paula
Institute/School/College
Knowledge Area
Date of Defense
Published
São Carlos, 2003
Supervisor
Committee
Di Bernardo, Luiz (President)
Isaac, Ricardo de Lima
Pádua, Valter Lúcio de
Title in Portuguese
Avaliação da dupla filtração para tratamento de água superficial utilizando filtração ascendente em areia grossa
Keywords in Portuguese
Dupla filtração
Filtração direta ascendente em areia grossa
Filtração rápida descendente
Abstract in Portuguese
Este trabalho consiste na avaliação do desempenho de uma instalação piloto de dupla filtração no tratamento de água superficial, apresentando turbidez entre 8,5 e 21 uT. A instalação piloto constituída de um sistema de filtração de duas fases, com filtração direta ascendente em areia grossa seguida da filtração rápida descendente em areia fina. A taxa de filtração variou de 120 a 360 m3/m2.dia no filtro ascendente e de 200 a 400 m3/m2.dia no filtro ascendente. Foram executadas descargas de fundo intermediários no filtro ascendente durante a carreira de filtração para avaliar a instalação piloto. Além disso, simulou pico de turbidez, para avaliar as condições. Baseado no trabalho experimental concluiu-se que: (i) a eficiência global do sistema de dupla filtração ascendente em areia grossa foi satisfatória, apresentando efluente final com turbidez inferior a 1 uT e cor verdadeira inferior a 1 uH; (ii) a distribuição da perda de carga nas camadas do meio granular do FAAG não apresentou diferenças significativas para as variadas taxas de filtração e modo de operação (com e sem execução de DIFs); (iii) os ensaios que foram realizados com a execução de DIFs apresentaram carreiras de filtração mais longas.
Title in English
Evaluation of double filtration systems for treatment of surface water using direct upflow filtration in coarse sand
Keywords in English
Double filtration
Rapid downflow filtration
Upflow direct filtration in coarse sand
Abstract in English
This work concerns the study of the performance of a double filtration pilot plant whom treating surface water, presenting turbidity between 8,5 and 21,0 NTU. The pilot plant consisted of a two-stage filtration system, with an upflow coarse sand direct filtrer followed by a dowflow fine sand filter. Filtration rats varied from 120 to 360 m/day in the upflow filter and from 200 to 400 m/day in the downflow filter. Intermediate downflow in the upflow filter were performed during the run length do evaluate the performance of the pilot plant in addition, a peak of turbidity in the for influent selected filter operating varabile, was studied here in. Based on the experimental work carried out, it was concluded that: (i) the global efficiency of the system of double filtration with upflow filtration in coarse sand was satisfactory, presenting final efflents with inferior turbidity to 1,0 NTU and inferior true color to 1 uH; (ii) the distribution of the load loss in the layers of the granular middle of FAAG didn't present significant differences for the varied filtration taxes and operation way (with and without execution of DFIs); (iii) the rehearsals that were accomplished with the execution of DFIs presented longer filtration runs.
 
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Publishing Date
2016-10-31
 
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