Hydraulic characterisation of the backwash process in sand filters used in micro irrigation

Deus, Fábio Ponciano de; Mesquita, Márcio; Ramirez, Juan Camilo Salcedo; Testezlaf, Roberto; Almeida, Rodrigo Cesar de

doi:10.1016/j.biosystemseng.2020.01.019

Cited by 19 publications

(7 citation statements)

References 22 publications

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“…Elbana et al (2012) used a reclaimed effluent to evaluate the efficiencies of sand filters with sand effective diameters of 0.32, 0.47, 0.63, and 0.64 mm at decreasing the turbidity and improving the dissolved oxygen concentration. De Deus et al (2020) evaluated the influence of the structural design, particle size, and filter height on the pressure loss and surface velocity of an expanded filter layer during the backwashing process of three types of sand filters. Based on dimensional analysis, Puig- Bargues et al (2005) established a general mathematical model for calculating the head loss of a mesh filter for micro-irrigation.…”

Section: Introductionmentioning

confidence: 99%

Establishment of prediction models of trapped sediment mass and total filtration efficiency of pre-pump micro-pressure filter

Liu

Huang

et al. 2022

Irrig Sci

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The filter before a pump is a key piece of equipment of a micro-irrigation system, which can ensure safe and stable operation. This paper examines a pre-pump micro-pressure filter, using the trapped sediment mass and total filtration efficiency as the assessment indicators. Orthogonal experiments of the physical model of the inlet flow, sediment content, water separator type, and filter area were conducted. The experimental results were processed by analysis of variance, dimensional analysis, and multiple regression analysis. The influences of the factors affecting the trapped sediment mass in descending order were the sediment content, filter area, water separator type, and inlet flow. The influences of the factors affecting the total filtration efficiency in descending order were the filter area, sediment content, water separator type, and inlet flow. While the water separator type significantly affected the trapped sediment mass and total filtration efficiency, the difference between the different treatments was insignificant. The prediction model for the trapped sediment mass (total filtration efficiency) was established with an R2 of 0.998 (0.889). Since the relative errors between the predicted and measured values were less than 6%, these models could produce accurate predictions. These results provide technical support for the structural optimization and filtration mechanism of the filter and advance the theory of micro-pressure filtration.

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Section: Introductionmentioning

confidence: 99%

Establishment of prediction models of trapped sediment mass and total filtration efficiency of pre-pump micro-pressure filter

Liu

Huang

et al. 2022

Irrig Sci

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“…Root-zone micro-irrigation, which is a subsurface irrigation technique, is a new, water-saving irrigation technique that can significantly improve crop yield, quality, and WUE ( Zhang et al, 2019a ; de Deus et al, 2020 ). This technique uses flexibly configured independent subsurface micro-emitters to transport water and liquid fertilizers in a pipe to the major active layers of the crop root zone in a small, uniform, targeted, and precise flow, thus effectively reducing surface evaporation.…”

Section: Introductionmentioning

confidence: 99%

Water Content Variations and Pepper Water-Use Efficiency of Yunnan Laterite Under Root-Zone Micro-Irrigation

et al. 2022

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Understanding the water content variations in Yunnan laterite (red loam soil, SR) in small-scale environments and exploring the potential for crop water-use efficiency (WUE) improvement are crucial for improving water-saving irrigation technologies used in greenhouse agriculture in Yunnan, China. In this study, a closed-loop model for calculating soil water in greenhouse potted cultivation was established based on water conservation. A Yunnan SR, yellow sand soil (SY), and a 1:1 SR–SY mixture (SM) subjected to root-zone micro-irrigation or surface-drip irrigation were experimentally examined to compare their water content variations and pepper WUEs. The results showed that the soil type and soil type–irrigation mode interaction had significant effects on both soil evaporation and pepper WUE, and that the variations in soil evaporation with respect to time can be expressed using a cubic polynomial function. In small-scale greenhouse cultivation, IG has good water-saving potential and is suitable for the SR (which has a better water-retention capacity), whereas IM is more suitable for the SY (which has a better water-penetration capacity). Mixing certain proportions of the SY into the SR will effectively impact the water content variations and crop WUE and provide opportunities for further improving the water-saving efficiency.

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“…River sand can also reduce the content of manganese element in peat water at around 6.92 mg/l, iron content at 0.08 mg/l, with a filtration time of 30 minutes [20]. However, the grain size of river sand can affect the flow rate of the water filtration process that occurs [21]. Crushed stone can also be used as a water filtration material along with river sand which is generally placed at the bottom layer [3].…”

Section: Introductionmentioning

confidence: 99%

Green Method: The Performance of Biochar in Water Filtration

Hakim¹,

Sumarli²,

Mahendra³

et al. 2022

aptek

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The results of measuring the power of Hydrogen (pH) of 5.5 mg/l and Total Dissolved Solid (TDS) of 3.20 mg/l level of water wells in a village, including in a school of Madrasah Tsanawiyah Negeri 5 in Tanjung Medan Rokan Hulu is considered not within permissible limit of World Health Organization (WHO) standards. For that reason, experimental research was conducted by firstly designing and making a water filtration device from Polyvinyl Chloride pipe of 4 inch in diameter, 100cm long, and 1 inch channel in and out. With the green method treatment, the biochar used are Coconut Shell Charcoal (CSC) and Bagasse Charcoal (BC), with additives material such as River Sand (RS), Fiber Palm (FP), and Crushed Gravel (CG). The results of the analysis prove that the best performance of Biochar in Water Filtration (BWF) to increase the content the pH of water to 89.09% is done by Coconut Shell Charcoal (CSC) biochar. While the best for reducing the water TDS level is performed by Bagasse Charcoal (BC) at 64.06%. The performance for pH increases and at the same time decreases the TDS level of water is done by Bagasse Charcoal (BC) biochar with a pH of 7.8 mg/l, and a TDS of 1.15 mg/l. Meanwhile, the filtration combination matrix that produces water according to the WHO standard permissible criteria is (A6+B6+C6+D1+E6), (A6+B6+C2+D2+E6), (A6+B6+C3+D3+E6), (A6+B6+C4+D4+E6), and (A6+B6+C5+D5+E6), as well (A6+B6+C1+D6+E6). So, it can be concluded that Biochar in Water Filtration (BWF) needs to be developed.

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Hydraulic characterisation of the backwash process in sand filters used in micro irrigation

Cited by 19 publications

References 22 publications

Establishment of prediction models of trapped sediment mass and total filtration efficiency of pre-pump micro-pressure filter

Establishment of prediction models of trapped sediment mass and total filtration efficiency of pre-pump micro-pressure filter

Water Content Variations and Pepper Water-Use Efficiency of Yunnan Laterite Under Root-Zone Micro-Irrigation

Green Method: The Performance of Biochar in Water Filtration

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