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Barral C. - One of the best experts on this subject based on the ideXlab platform.
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Comparaison du comportement de plusieurs géotextiles utilisés pour la filtration de boues argileuses : étude expérimentale
'Elsevier BV', 2019Co-Authors: Stoltz G., Delmas Philippe, Barral C.Abstract:This paper presents the results of an experimental study of various geotextiles used to filter clayey sludge. The use of geotextiles to filter clayey sludge or suspensions of fine particles in water is more complex than that for filtering suspensions of granular soils. In practice, such applications generally use flocculants to postpone the formation of a low-permeability filter cake. The objective of the present study, which does not use flocculants, is to determine how geotextile characteristics affect the capacity of the geotextile to filter clayey sludge. Three key questions are addressed: (1) What are the main differences between vertical and horizontal filtration? (2) How do geotextile characteristics (nature, opening size, permeability, etc.) affect its capacity to filter clayey sludge (3) How do clayey sludge characteristics (i.e., grain size distribution and concentration)? and the type of flow (i.e., constant head or constant flow) affect the filtering capacity of geotextiles? To evaluate the capacity of a geotextile to filter clayey sludge, we propose three relevant criteria and analyse two filtration phases induced by different cake-formation processes (controlled by the geotextile and controlled by the filter cake). To determine the main differences between vertical and horizontal filtration, the settling of fines in the testing device and its influence on the results are analysed and discussed. This study shows that, for the various clayey sludge tested, the geotextiles (needle-punched Nonwoven and thermally bonded Nonwoven) with the smallest opening sizes (O90≤60 µm) give the most promising results for filtering fines without the use of flocculants. Of these geotextiles, the thermally bonded Nonwoven Structure seems to offer the best filtration performance for the largest range of fines concentration in the sludge
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Comparaison du comportement de plusieurs géotextiles utilisés pour la filtration de boues argileuses : étude expérimentale
'Elsevier BV', 2019Co-Authors: Stoltz G., Delmas Philippe, Barral C.Abstract:International audienceThis paper presents the results of an experimental study of various geotextiles used to filter clayey sludge. The use of geotextiles to filter clayey sludge or suspensions of fine particles in water is more complex than that for filtering suspensions of granular soils. In practice, such applications generally use flocculants to postpone the formation of a low-permeability filter cake. The objective of the present study, which does not use flocculants, is to determine how geotextile characteristics affect the capacity of the geotextile to filter clayey sludge. Three key questions are addressed: (1) What are the main differences between vertical and horizontal filtration? (2) How do geotextile characteristics (nature, opening size, permeability, etc.) affect its capacity to filter clayey sludge (3) How do clayey sludge characteristics (i.e., grain size distribution and concentration)? and the type of flow (i.e., constant head or constant flow) affect the filtering capacity of geotextiles? To evaluate the capacity of a geotextile to filter clayey sludge, we propose three relevant criteria and analyse two filtration phases induced by different cake-formation processes (controlled by the geotextile and controlled by the filter cake). To determine the main differences between vertical and horizontal filtration, the settling of fines in the testing device and its influence on the results are analysed and discussed. This study shows that, for the various clayey sludge tested, the geotextiles (needle-punched Nonwoven and thermally bonded Nonwoven) with the smallest opening sizes (O90≤60 µm) give the most promising results for filtering fines without the use of flocculants. Of these geotextiles, the thermally bonded Nonwoven Structure seems to offer the best filtration performance for the largest range of fines concentration in the sludge
Stoltz G. - One of the best experts on this subject based on the ideXlab platform.
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Comparaison du comportement de plusieurs géotextiles utilisés pour la filtration de boues argileuses : étude expérimentale
'Elsevier BV', 2019Co-Authors: Stoltz G., Delmas Philippe, Barral C.Abstract:This paper presents the results of an experimental study of various geotextiles used to filter clayey sludge. The use of geotextiles to filter clayey sludge or suspensions of fine particles in water is more complex than that for filtering suspensions of granular soils. In practice, such applications generally use flocculants to postpone the formation of a low-permeability filter cake. The objective of the present study, which does not use flocculants, is to determine how geotextile characteristics affect the capacity of the geotextile to filter clayey sludge. Three key questions are addressed: (1) What are the main differences between vertical and horizontal filtration? (2) How do geotextile characteristics (nature, opening size, permeability, etc.) affect its capacity to filter clayey sludge (3) How do clayey sludge characteristics (i.e., grain size distribution and concentration)? and the type of flow (i.e., constant head or constant flow) affect the filtering capacity of geotextiles? To evaluate the capacity of a geotextile to filter clayey sludge, we propose three relevant criteria and analyse two filtration phases induced by different cake-formation processes (controlled by the geotextile and controlled by the filter cake). To determine the main differences between vertical and horizontal filtration, the settling of fines in the testing device and its influence on the results are analysed and discussed. This study shows that, for the various clayey sludge tested, the geotextiles (needle-punched Nonwoven and thermally bonded Nonwoven) with the smallest opening sizes (O90≤60 µm) give the most promising results for filtering fines without the use of flocculants. Of these geotextiles, the thermally bonded Nonwoven Structure seems to offer the best filtration performance for the largest range of fines concentration in the sludge
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Comparaison du comportement de plusieurs géotextiles utilisés pour la filtration de boues argileuses : étude expérimentale
'Elsevier BV', 2019Co-Authors: Stoltz G., Delmas Philippe, Barral C.Abstract:International audienceThis paper presents the results of an experimental study of various geotextiles used to filter clayey sludge. The use of geotextiles to filter clayey sludge or suspensions of fine particles in water is more complex than that for filtering suspensions of granular soils. In practice, such applications generally use flocculants to postpone the formation of a low-permeability filter cake. The objective of the present study, which does not use flocculants, is to determine how geotextile characteristics affect the capacity of the geotextile to filter clayey sludge. Three key questions are addressed: (1) What are the main differences between vertical and horizontal filtration? (2) How do geotextile characteristics (nature, opening size, permeability, etc.) affect its capacity to filter clayey sludge (3) How do clayey sludge characteristics (i.e., grain size distribution and concentration)? and the type of flow (i.e., constant head or constant flow) affect the filtering capacity of geotextiles? To evaluate the capacity of a geotextile to filter clayey sludge, we propose three relevant criteria and analyse two filtration phases induced by different cake-formation processes (controlled by the geotextile and controlled by the filter cake). To determine the main differences between vertical and horizontal filtration, the settling of fines in the testing device and its influence on the results are analysed and discussed. This study shows that, for the various clayey sludge tested, the geotextiles (needle-punched Nonwoven and thermally bonded Nonwoven) with the smallest opening sizes (O90≤60 µm) give the most promising results for filtering fines without the use of flocculants. Of these geotextiles, the thermally bonded Nonwoven Structure seems to offer the best filtration performance for the largest range of fines concentration in the sludge
Delmas Philippe - One of the best experts on this subject based on the ideXlab platform.
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Comparaison du comportement de plusieurs géotextiles utilisés pour la filtration de boues argileuses : étude expérimentale
'Elsevier BV', 2019Co-Authors: Stoltz G., Delmas Philippe, Barral C.Abstract:This paper presents the results of an experimental study of various geotextiles used to filter clayey sludge. The use of geotextiles to filter clayey sludge or suspensions of fine particles in water is more complex than that for filtering suspensions of granular soils. In practice, such applications generally use flocculants to postpone the formation of a low-permeability filter cake. The objective of the present study, which does not use flocculants, is to determine how geotextile characteristics affect the capacity of the geotextile to filter clayey sludge. Three key questions are addressed: (1) What are the main differences between vertical and horizontal filtration? (2) How do geotextile characteristics (nature, opening size, permeability, etc.) affect its capacity to filter clayey sludge (3) How do clayey sludge characteristics (i.e., grain size distribution and concentration)? and the type of flow (i.e., constant head or constant flow) affect the filtering capacity of geotextiles? To evaluate the capacity of a geotextile to filter clayey sludge, we propose three relevant criteria and analyse two filtration phases induced by different cake-formation processes (controlled by the geotextile and controlled by the filter cake). To determine the main differences between vertical and horizontal filtration, the settling of fines in the testing device and its influence on the results are analysed and discussed. This study shows that, for the various clayey sludge tested, the geotextiles (needle-punched Nonwoven and thermally bonded Nonwoven) with the smallest opening sizes (O90≤60 µm) give the most promising results for filtering fines without the use of flocculants. Of these geotextiles, the thermally bonded Nonwoven Structure seems to offer the best filtration performance for the largest range of fines concentration in the sludge
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Comparaison du comportement de plusieurs géotextiles utilisés pour la filtration de boues argileuses : étude expérimentale
'Elsevier BV', 2019Co-Authors: Stoltz G., Delmas Philippe, Barral C.Abstract:International audienceThis paper presents the results of an experimental study of various geotextiles used to filter clayey sludge. The use of geotextiles to filter clayey sludge or suspensions of fine particles in water is more complex than that for filtering suspensions of granular soils. In practice, such applications generally use flocculants to postpone the formation of a low-permeability filter cake. The objective of the present study, which does not use flocculants, is to determine how geotextile characteristics affect the capacity of the geotextile to filter clayey sludge. Three key questions are addressed: (1) What are the main differences between vertical and horizontal filtration? (2) How do geotextile characteristics (nature, opening size, permeability, etc.) affect its capacity to filter clayey sludge (3) How do clayey sludge characteristics (i.e., grain size distribution and concentration)? and the type of flow (i.e., constant head or constant flow) affect the filtering capacity of geotextiles? To evaluate the capacity of a geotextile to filter clayey sludge, we propose three relevant criteria and analyse two filtration phases induced by different cake-formation processes (controlled by the geotextile and controlled by the filter cake). To determine the main differences between vertical and horizontal filtration, the settling of fines in the testing device and its influence on the results are analysed and discussed. This study shows that, for the various clayey sludge tested, the geotextiles (needle-punched Nonwoven and thermally bonded Nonwoven) with the smallest opening sizes (O90≤60 µm) give the most promising results for filtering fines without the use of flocculants. Of these geotextiles, the thermally bonded Nonwoven Structure seems to offer the best filtration performance for the largest range of fines concentration in the sludge
Alagirusamy R - One of the best experts on this subject based on the ideXlab platform.
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Water filtration using Nonwoven cartridge filter system
Indian Journal of Fibre & Textile Research (IJFTR), 2020Co-Authors: Gadkari Rahul, Kuma Ipi, Ali Wazed, Das Apurba, Alagirusamy RAbstract:A cartridge based fibrous filtration system has been designed and investigated. For the fibrous medium, needle-punch Nonwoven Structure has been selected and different Nonwoven samples are analysed for the water purification. A series of different needle-punched Nonwovens made of polypropylene have been produced by changing mass per unit area, needling density and fibre linear density. A chemical oxygen demand test has been employed to obtain the filtration efficiency (FE). The FE obtained for these samples ranges from 8.84% to 78.04% in purifying the reference water (mud water). It has been found that the FE increases with increase in mass per unit area and needling density (p < 0.01). Also, the filter media made of finer fibres displays higher FE than coarser fibre (p < 0.01). On examining the filter performance in multiple filtration cycles, it is found that the FE increases initially and finally reaches to a saturation value. A good correlation (r2 > 0.95) has been found for the FE of each cycle with the air permeability, thickness and weight density of the loaded filter. The FE of the bare Nonwoven (maximum FE) further improves (95%) by incorporating activated particles
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Water filtration using Nonwoven cartridge filter system
NISCAIR-CSIR India, 2020Co-Authors: Gadkari Rahul, Kuma Ipi, Ali Wazed, Das Apurba, Alagirusamy RAbstract:72-79A cartridge based fibrous filtration system has been designed and investigated. For the fibrous medium, needle-punch Nonwoven Structure has been selected and different Nonwoven samples are analysed for the water purification. A series of different needle-punched Nonwovens made of polypropylene have been produced by changing mass per unit area, needling density and fibre linear density. A chemical oxygen demand test has been employed to obtain the filtration efficiency (FE). The FE obtained for these samples ranges from 8.84% to 78.04% in purifying the reference water (mud water). It has been found that the FE increases with increase in mass per unit area and needling density (p r2 > 0.95) has been found for the FE of each cycle with the air permeability, thickness and weight density of the loaded filter. The FE of the bare Nonwoven (maximum FE) further improves (95%) by incorporating activated particles
C. Barral - One of the best experts on this subject based on the ideXlab platform.
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Comparison of the behaviour of various geotextiles used in the filtration of clayey sludge: An experimental study
Geotextiles and Geomembranes, 2019Co-Authors: G. Stoltz, Philippe Delmas, C. BarralAbstract:This paper presents the results of an experimental study of various geotextiles used to filter clayey sludge. The use of geotextiles to filter clayey sludge or suspensions of fine particles in water is more complex than that for filtering suspensions of granular soils. In practice, such applications generally use flocculants to postpone the formation of a low-permeability filter cake. The objective of the present study, which does not use flocculants, is to determine how geotextile characteristics affect the capacity of the geotextile to filter clayey sludge. Three key questions are addressed: (1) What are the main differences between vertical and horizontal filtration? (2) How do geotextile characteristics (nature, opening size, permeability, etc.) affect its capacity to filter clayey sludge (3) How do clayey sludge characteristics (i.e., grain size distribution and concentration)? and the type of flow (i.e., constant head or constant flow) affect the filtering capacity of geotextiles? To evaluate the capacity of a geotextile to filter clayey sludge, we propose three relevant criteria and analyse two filtration phases induced by different cake-formation processes (controlled by the geotextile and controlled by the filter cake). To determine the main differences between vertical and horizontal filtration, the settling of fines in the testing device and its influence on the results are analysed and discussed. This study shows that, for the various clayey sludge tested, the geotextiles (needle-punched Nonwoven and thermally bonded Nonwoven) with the smallest opening sizes (O90≤60 µm) give the most promising results for filtering fines without the use of flocculants. Of these geotextiles, the thermally bonded Nonwoven Structure seems to offer the best filtration performance for the largest range of fines concentration in the sludge.
