Slow Sand Filtration

Kohne, Roger W.; Logsdon, Gary S.

doi:10.1061/40569(2001)483

Cited by 6 publications

(10 citation statements)

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“…La calidad del efluente de una FLA depende de cuatro factores: la calidad del afluente, la temperatura, la velocidad de filtración aplicada y la composición del lecho filtrante (Huisman, 1979).…”

Section: Filtración Lenta En Arena (Fla)unclassified

“…En lo relacionado con el tamaño de partículas en el efluente de cada uno de los tratamientos de agua, a pesar de que no se hicieron mediciones de ese parámetro, la literatura reporta lo siguiente: Sánchez (1996) al caracterizar las velocidades de asentamiento de partículas en la superficie de filtros lentos, encontró que los filtros gruesos de grava (tratamientos T1 y T2) permiten pasar partículas menores o iguales a 127 µm. De otra parte, Huisman (1979) indica que el efluente de un filtro lento (configuración T3) puede tener un tamaño de partículas menor o igual a 20 µm, mientras que Bellamy et al (1985) reporta que un filtro lento retiene el 98% de partículas con tamaños entre 6,3 y 12,7 µm. Finalmente por las características de diseño, el filtro de anillos (tratamiento T4) en el efluente facilita el paso de partículas menores o iguales a 106 µm (tamaño de ranura para el filtro de anillos utilizado).…”

Section: Influencia De Los Tratamientos En El Comportamiento Hidráuli...unclassified

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Aplicación de la tecnología de filtración en múltiples etapas con sistemas de riego localizado de alta frecuencia

Torres¹,

Montero²,

Diaz³

2011

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Este libro de investigación muestra la evaluación realizada, a escala piloto, a la tecnología de Filtración en Múltiples Etapas (FiME), para mejorar la calidad de agua en sistemas de riego con el fin de disminuir el riesgo de obturación en los emisores de sistemas de Riego Localizado de Alta Frecuencia (RLAF). Se estudió la eficiencia de remoción de parámetros físicos, químicos y microbiológicos que inciden en la obturación de los emisores de riego localizado, para tres configuraciones FiME (Filtro Grueso Dinámico, FGDi + Filtro Grueso Ascendente en Capas, FGAC; FGDi + Filtro Grueso Ascendente en serie en 2 etapas, FGAS2; y FGDi + FGAC + Filtro Lento en Arena, FLA) y un filtro convencional de anillos, FC. El efluente de cada una de esas tecnologías alimentó cuatro tipos de sistemas RLAF: Microjet, Lyn, Autocompensado y Cinta de riego.

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Section: Filtración Lenta En Arena (Fla)unclassified

Section: Influencia De Los Tratamientos En El Comportamiento Hidráuli...unclassified

Aplicación de la tecnología de filtración en múltiples etapas con sistemas de riego localizado de alta frecuencia

Torres¹,

Montero²,

Diaz³

2011

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“…Several technologies used in decentralized water treatment systems, both point-of-entry (POE) and point-of-use (POU), include sand filtration (Peter-Varbanets et al, 2012;SU et al, 2009;Yakub et al, 2013;Yogafanny et al, 2014), ceramic filter (Chaukura et al, 2020), and pervious concrete filter (Maadji, 2018a;Maadji et al, 2016a). The sand filter is an old method and has been recognized for its superiority, especially in reducing turbidity and bacteria in raw water (Fuchs et al, 2015;Kohne et al, 2002;Silva dan Fuchs, 2015;Yogafanny et al, 2014). This filter can reduce turbidity by up to 70% reaching a water turbidity value <1 NTU at the outlet (Fuchs et al, 2015;Logsdon et al, 2002).…”

Section: Introductionmentioning

confidence: 99%

Pervious Concrete and Pervious Mortar as Water Filter in Decentralized Water Treatment– a Review

Yogafanny,

Triatmadja,

Nurrochmad

et al. 2024

J. Geoscience Eng. Environ. Technol.

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Decentralized water treatment system is water treatment carried out by the community on a household-scale. One of the technologies that have been developed to gain freshwater is the pervious concrete filter (PCF). This study aims to provide the researchers with an understanding of the pervious concrete filter as a potential filter technology in water treatment. The method used is a literature review from several papers and reports related to pervious concrete from past to present. PCF is a filter made from a mixture of aggregate, cement, and water with a specific ratio. PCF has enough water and air permeability due to interconnected macro pores. Some properties such as porosity, permeability, and pores size determine the ability of PCF to remove the contaminants in the water. These properties were controlled mostly by the aggregate size, aggregate-cement ratio, water-cement ratio, etc. According to its characteristic, the PCF shows a prospect to be used as water filter mainly in a decentralized water treatment system. Besides, the understanding of PCF is a basis to develop a pervious mortar filter that slightly different in the aggregate sizes used in this composite.

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“…The channel's initial size is modest to induce turbulence, which encourages flocculation.The primary objective of this research is to analyze the performance of hydraulic Flocculator in terms of turbidity removal efficiency theoretically, at sedimentation tank and rapid sand filter for various coagulant (PAC-poly aluminum chloride) doses, analyze the theoretical design parameters and field implementation and find out the improvements that can be done to increase the efficiency of the system. Filtration is the process in which the suspended particles removed from a flow by passing through a prose media and rapid sand filtration is a purely physical treatment process which can be explained by two physical principles: mechanical straining and physical adsorption [5,6]. Firstly, Mechanical straining: larger suspended particles get stuck between the sand particles as they pass through the filter media.…”

Section: Introductionmentioning

confidence: 99%

Field Approach on the Effectiveness of Hydraulic Flocculator Followed By Sedimentation and Rapid Sand Filter

Pyakurel,

Khatri,

Lekhak

2024

Himalayan J. Appl. Sci. Engin.

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This research investigates the effectiveness of a hydraulic flocculator at the Kalanki Groundwater Treatment Project-Sipradi in Kalanki-Kathmandu. Hydraulic flocculation is a cost-effective alternative to mechanical flocculation, particularly beneficial for developing nations. The study involved determining the optimal Poly Aluminium Chloride (PACl) dosage through Jar Testing and assessing the flocculator's efficiency in the field with this dose. The research also analyzed other treatment units under various PACl doses to evaluate the Water Treatment Plant's operational conditions and the required PACl dose for efficient turbidity removal. The system included components like a deep well source, V-Notch weir tank, hydraulic flocculator, sedimentation tank, rapid sand filter (RSF), chlorinator, and clear water reservoir, with a 16-minute flocculator detention time. Baffle walls were strategically positioned at various intervals on-site. The study revealed that while sedimentation with coagulation achieved peak efficiency at a PACl dose of 80mg/l, it was less efficient than a 16-minute jar detention, likely due to sedimentation tank short-circuiting. Increasing the PACl dose from 20 mg/l to 80 mg/l improved overall unit efficiency, indicating the need for more mixing energy in the existing flocculator length for optimal results. The filter unit's efficiency remained consistent, whether with or without coagulation, at 57.69% and 54.10%, respectively. These results emphasize the importance of further investigation to enhance water treatment processes and coagulant dosages for improved effectiveness in this critical field.

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Slow Sand Filtration

Cited by 6 publications

References 0 publications

Aplicación de la tecnología de filtración en múltiples etapas con sistemas de riego localizado de alta frecuencia

Aplicación de la tecnología de filtración en múltiples etapas con sistemas de riego localizado de alta frecuencia

Pervious Concrete and Pervious Mortar as Water Filter in Decentralized Water Treatment– a Review

Field Approach on the Effectiveness of Hydraulic Flocculator Followed By Sedimentation and Rapid Sand Filter

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