Processo da retrolavagem em filtros de areia usados na irrigação localizada

Salcedo, Juan Camilo; Testezlaf, Roberto; Mesquita, Márcio

doi:10.1590/s0100-69162011000600020

Cited by 10 publications

(13 citation statements)

References 7 publications

(2 reference statements)

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“…In the case of small and medium gravel, the opposite happens, making it difficult to wash the material and in some occasions, making it impossible to reuse these elements, in agreement with the statements of Salcedo et al (2011) andTestezlaf et al (2014). However, the small and medium gravels have a higher capacity of retention of suspended solids in the water, obtaining a higher filtration efficiency, as observed in this study (Figure 2).…”

Section: Resultssupporting

confidence: 76%

“…According to Salcedo et al (2011) and Testezlaf et al (2014), it is extremely necessary to know the characteristics of filters for irrigated agriculture, in which the correct choice and proper handling of the filter media can guarantee the efficiency in the removal of undesirable contaminants in the irrigation system. Among the many studies (Crozariollo Neto et al, 2011;Paterniani et al, 2011;Carmo et al, 2012;Miranda et al, 2012;Silva et al, 2012;Ribeiro & Paterniani, 2013;Oliveira et al, 2016) in the development of alternative filters emphasize the importance of good results for irrigation, due to its low cost and easy acquisition of the filtering material, being able to be incorporated within the agriculture irrigated by the small farmer and allowing to attend small projects of localized irrigation, providing quality water and favoring optimal operation throughout the irrigation system.…”

Section: Resultsmentioning

confidence: 99%

“…), maintaining efficiency and reducing costs for maintenance and renovation of irrigation systems. Therefore, the use of commercial filter elements, such as disc, screen and sand filters, among others, has the objective of improving the physical-chemical quality of the water, aiming at the proper functioning of the system (Salcedo et al, 2011;Testezlaf et al, 2014). However, commercial filters usually have a high cost per acquisition and maintenance, low durability over time and consequently low filtering efficiency, making it less viable for rural agricultural regions (Oliveira et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

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Efficiency of Artesian Filters to Eliminate Solids Present in Irrigation Water

Silva¹,

Oliveira²,

Miranda³

et al. 2017

Anais Do IV Inovagri International Meeting - 2017

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SUMMARY:The objective of this study was to determine the efficiency of artesian filters using different diameters in comparison with a commercial filter, using water with suspended solids sediments. The handmade sand filter was constructed from a reservoir cylindrical of gas cooking 13kg. The different sizes of gravel were used (small, medium and large: 0.2; 1.58 e 2.85 mm, respectively). It was adopted in the experiment completely randomized design with 4 treatments and 8 replications. For analysis of the results were submitted to descriptive statistics, normality test and coefficient of variation in each of the treatments and were also performed by analysis of variance. The conventional disc filter was used as control treatment.The handmade sand filter with use of gravels of different diameters, small (36.64 %), medium (35.16 %) and large (29.26 %), were more efficient than the market filter (25.57 %). Artisanal and commercial filters presented similar efficiencies, as they did not present statistical differences, so these filters with gravel use become a viable alternative for irrigated agriculture.KEYWORDS: localized irrigation, water quality, clogging emitters. EFICIÊNCIA DE FILTROS ARTESANAIS

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Section: Resultssupporting

confidence: 76%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Efficiency of Artesian Filters to Eliminate Solids Present in Irrigation Water

Silva¹,

Oliveira²,

Miranda³

et al. 2017

Anais Do IV Inovagri International Meeting - 2017

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“…To perform a backwash, it is necessary to conduct previously filtered water through one or more filters of the filtration set, in the opposite direction of the filtration process (usually upward) with enough velocity to promote an adequate level of expansion and disturbance of the filter bed (Kau & Lawler, 1995;Turan et al, 2003;Ramirez et al, 2011). In filter bed expansion during the backwash, the required value of superficial velocity increases with the increment in the desired expansion level and with the filter media granulometry, varying its magnitude between the different construction models of sand filter drains (Ramirez et al, 2011;Mesquita et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

Assessment methodology of backwash in pressurized sand filters

Deus

Testezlaf

Mesquita

2016

Rev. bras. eng. agríc. ambient.

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A B S T R A C TThe objective of this study was to apply a methodology based on sampling sand from contaminated filter beds, to evaluate the performance of the backwash process in pressurized sand filters used in irrigation. Backwash trials were conducted in an experimental module with three new sand filters of the same commercial model. The evaluations were conducted after filtration processes performed using four filtration rates and three separate sand particle sizes (fine -0.55 mm; medium -0.77 mm, and coarse sand -1.04 mm diameter), repeated in three subsequent cycles. After reaching a fixed expansion of 25% of the filter bed height, the backwash processes were performed for 15 min. Backwash cleaning efficiency was evaluated in all trials based on the mass of removed solids for different filter bed layers and throughout the entire filter bed. The backwash assessment methodology is effective and has potential to be a practical tool for farmers in the evaluation of the performance of pressurized sand filters used in irrigation.Metodologia de avaliação do processo de retrolavagem em filtros de areia pressurizados R E S U M O Propôs-se, neste trabalho, aplicar uma metodologia baseada em amostragens de areia de leitos filtrantes contaminados para avaliar o desempenho do processo de retrolavagem em filtros de areia pressurizados utilizados na irrigação. Os ensaios de retrolavagem foram conduzidos em um módulo experimental constituído de três filtros novos de areia e de um mesmo modelo comercial. As avaliações foram conduzidas após processos de filtração realizados com o emprego de quatro taxas de filtração em três granulometrias de areia, separadamente (areia fina, 0,55 mm; média, 0,77 mm e grossa, 1,04 mm de diâmetro) repetidos em três ciclos de filtração subsequentes; após atingir uma expansão fixa de 25% da altura leito filtrante, as retrolavagens foram processadas por 15 min; a eficiência de limpeza da retrolavagem foi avaliada em todos os ensaios a partir da massa de sólidos removidos para as diferentes camadas do leito filtrante e para a camada, por inteiro. A metodologia de avaliação do processo de retrolavagem é eficaz e possui potencial para ser uma ferramenta prática para o agricultor na avaliação do desempenho de filtros de areia pressurizados utilizados na irrigação.

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“…Esse processo aumenta a perda de pressão nos filtros com o tempo (Awady et al, 2008). O aumento na perda de pressão, associado à possibilidade de diminuição da eficiência de remoção de partículas no processo, determina a necessidade da limpeza da camada, pelo processo de retrolavagem (Salcedo et al, 2011).…”

Section: Introductionunclassified

Eficiência de filtros de areia pressurizados na remoção de diferentes tamanhos de partículas da água de irrigação

Deus

Testezlaf

Mesquita

2015

Pesq. agropec. bras.

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Resumo:O objetivo deste trabalho foi avaliar a eficiência de filtros de areia com diferentes granulometrias na remoção de diferentes tamanhos de partículas da água de irrigação, bem como a perda de pressão em função da taxa de filtração e da granulometria de areia do leito filtrante. Os ensaios foram realizados com três filtros de um mesmo modelo comercial, testados com diferentes combinações de granulometrias de areia (areia fina, 0,55 mm; média, 0,77 mm; e grossa, 1,04 mm de diâmetro) e taxas de filtração (20, 40, 60 e 75 m3m-2 h-1), e repetidos em três ciclos de filtração de 4 horas (C1, C2 e C3, realizados em 3 dias consecutivos). O filtro de areia avaliado é efetivo na remoção de partículas a partir do tamanho de areia fina (>60 μm). Nesta faixa de remoção de partículas, a influência da taxa de filtração aumenta com a diminuição do tamanho de partícula na água. O aumento na taxa de filtração, associado à diminuição da granulometria de areia, aumenta a eficiência de remoção, mas acentua a perda de pressão com o tempo, o que diminui a remoção das partículas menores ao longo dos ciclos de filtração.

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Processo da retrolavagem em filtros de areia usados na irrigação localizada

Cited by 10 publications

References 7 publications

Efficiency of Artesian Filters to Eliminate Solids Present in Irrigation Water

Efficiency of Artesian Filters to Eliminate Solids Present in Irrigation Water

Assessment methodology of backwash in pressurized sand filters

Eficiência de filtros de areia pressurizados na remoção de diferentes tamanhos de partículas da água de irrigação

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