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Geoff D Moggridge - One of the best experts on this subject based on the ideXlab platform.

  • Zebra mussel filtration and its potential uses in Industrial Water Treatment.
    Water research, 2007
    Co-Authors: Paul Elliott, David C Aldridge, Geoff D Moggridge
    Abstract:

    The zebra mussel (Dreissena polymorpha) is a notorious freshWater biofouling pest, and populations of the species can alter aquatic environments through their substantial filtration capabilities. Despite the ecological importance of zebra mussel filtration, many predictions of their large-scale effects on ecosystems rely on extrapolations from filtration rates obtained in static laboratory experiments, not accounting for natural mussel densities, boundary layer effects, flow rates or elevated algal concentrations. This study used large-scale Industrial flume trials to investigate the influence of these factors on zebra mussel filtration and proposes some novel Industrial applications of these findings. The flume trials revealed some of the highest zebra mussel clearance rates found to date, up to 574+/-20mlh(-1)g(-1) of wet tissue mass. Under low algal concentrations, chlorophyll a removal by zebra mussels was not proportional to mussel density, indicating that field rates of zebra mussel grazing may be much lower than previous studies have predicted. Increasing ambient velocities up to 100mls(-1) ( approximately 4cms(-1)) led to increased clearance rates by zebra mussels, possibly due to the replenishment of locally depleted resources, but higher velocities of 300mls(-1) (12cms(-1)) did not lead to further significant increases in clearance rate. When additional algal cultures were dosed into the flumes, chlorophyll a removal increased approximately logarithmically with zebra mussel density and there were no differences in the clearance of three different species of alga: Ankyra judayi, Pandorina morum and Cyclotella meneghinia. Some novel Industrial uses of these zebra mussel filtration studies are proposed, such as: (1) helping to inform models that predict the large-scale grazing effects of the mussels, (2) allowing estimates of zebra mussel densities in Industrial pipelines, and (3) constructing large-scale biofilters for use in Water clarification.

  • Zebra mussel filtration and its potential uses in Industrial Water Treatment.
    Water Research, 2007
    Co-Authors: Paul Elliott, David C Aldridge, Geoff D Moggridge
    Abstract:

    Abstract The zebra mussel ( Dreissena polymorpha ) is a notorious freshWater biofouling pest, and populations of the species can alter aquatic environments through their substantial filtration capabilities. Despite the ecological importance of zebra mussel filtration, many predictions of their large-scale effects on ecosystems rely on extrapolations from filtration rates obtained in static laboratory experiments, not accounting for natural mussel densities, boundary layer effects, flow rates or elevated algal concentrations. This study used large-scale Industrial flume trials to investigate the influence of these factors on zebra mussel filtration and proposes some novel Industrial applications of these findings. The flume trials revealed some of the highest zebra mussel clearance rates found to date, up to 574±20 ml h −1  g −1 of wet tissue mass. Under low algal concentrations, chlorophyll a removal by zebra mussels was not proportional to mussel density, indicating that field rates of zebra mussel grazing may be much lower than previous studies have predicted. Increasing ambient velocities up to 100 ml s −1 (∼4 cm s −1 ) led to increased clearance rates by zebra mussels, possibly due to the replenishment of locally depleted resources, but higher velocities of 300 ml s −1 (12 cm s −1 ) did not lead to further significant increases in clearance rate. When additional algal cultures were dosed into the flumes, chlorophyll a removal increased approximately logarithmically with zebra mussel density and there were no differences in the clearance of three different species of alga: Ankyra judayi , Pandorina morum and Cyclotella meneghinia. Some novel Industrial uses of these zebra mussel filtration studies are proposed, such as: (1) helping to inform models that predict the large-scale grazing effects of the mussels, (2) allowing estimates of zebra mussel densities in Industrial pipelines, and (3) constructing large-scale biofilters for use in Water clarification.

Paul Elliott - One of the best experts on this subject based on the ideXlab platform.

  • Zebra mussel filtration and its potential uses in Industrial Water Treatment.
    Water research, 2007
    Co-Authors: Paul Elliott, David C Aldridge, Geoff D Moggridge
    Abstract:

    The zebra mussel (Dreissena polymorpha) is a notorious freshWater biofouling pest, and populations of the species can alter aquatic environments through their substantial filtration capabilities. Despite the ecological importance of zebra mussel filtration, many predictions of their large-scale effects on ecosystems rely on extrapolations from filtration rates obtained in static laboratory experiments, not accounting for natural mussel densities, boundary layer effects, flow rates or elevated algal concentrations. This study used large-scale Industrial flume trials to investigate the influence of these factors on zebra mussel filtration and proposes some novel Industrial applications of these findings. The flume trials revealed some of the highest zebra mussel clearance rates found to date, up to 574+/-20mlh(-1)g(-1) of wet tissue mass. Under low algal concentrations, chlorophyll a removal by zebra mussels was not proportional to mussel density, indicating that field rates of zebra mussel grazing may be much lower than previous studies have predicted. Increasing ambient velocities up to 100mls(-1) ( approximately 4cms(-1)) led to increased clearance rates by zebra mussels, possibly due to the replenishment of locally depleted resources, but higher velocities of 300mls(-1) (12cms(-1)) did not lead to further significant increases in clearance rate. When additional algal cultures were dosed into the flumes, chlorophyll a removal increased approximately logarithmically with zebra mussel density and there were no differences in the clearance of three different species of alga: Ankyra judayi, Pandorina morum and Cyclotella meneghinia. Some novel Industrial uses of these zebra mussel filtration studies are proposed, such as: (1) helping to inform models that predict the large-scale grazing effects of the mussels, (2) allowing estimates of zebra mussel densities in Industrial pipelines, and (3) constructing large-scale biofilters for use in Water clarification.

  • Zebra mussel filtration and its potential uses in Industrial Water Treatment.
    Water Research, 2007
    Co-Authors: Paul Elliott, David C Aldridge, Geoff D Moggridge
    Abstract:

    Abstract The zebra mussel ( Dreissena polymorpha ) is a notorious freshWater biofouling pest, and populations of the species can alter aquatic environments through their substantial filtration capabilities. Despite the ecological importance of zebra mussel filtration, many predictions of their large-scale effects on ecosystems rely on extrapolations from filtration rates obtained in static laboratory experiments, not accounting for natural mussel densities, boundary layer effects, flow rates or elevated algal concentrations. This study used large-scale Industrial flume trials to investigate the influence of these factors on zebra mussel filtration and proposes some novel Industrial applications of these findings. The flume trials revealed some of the highest zebra mussel clearance rates found to date, up to 574±20 ml h −1  g −1 of wet tissue mass. Under low algal concentrations, chlorophyll a removal by zebra mussels was not proportional to mussel density, indicating that field rates of zebra mussel grazing may be much lower than previous studies have predicted. Increasing ambient velocities up to 100 ml s −1 (∼4 cm s −1 ) led to increased clearance rates by zebra mussels, possibly due to the replenishment of locally depleted resources, but higher velocities of 300 ml s −1 (12 cm s −1 ) did not lead to further significant increases in clearance rate. When additional algal cultures were dosed into the flumes, chlorophyll a removal increased approximately logarithmically with zebra mussel density and there were no differences in the clearance of three different species of alga: Ankyra judayi , Pandorina morum and Cyclotella meneghinia. Some novel Industrial uses of these zebra mussel filtration studies are proposed, such as: (1) helping to inform models that predict the large-scale grazing effects of the mussels, (2) allowing estimates of zebra mussel densities in Industrial pipelines, and (3) constructing large-scale biofilters for use in Water clarification.

David C Aldridge - One of the best experts on this subject based on the ideXlab platform.

  • Zebra mussel filtration and its potential uses in Industrial Water Treatment.
    Water research, 2007
    Co-Authors: Paul Elliott, David C Aldridge, Geoff D Moggridge
    Abstract:

    The zebra mussel (Dreissena polymorpha) is a notorious freshWater biofouling pest, and populations of the species can alter aquatic environments through their substantial filtration capabilities. Despite the ecological importance of zebra mussel filtration, many predictions of their large-scale effects on ecosystems rely on extrapolations from filtration rates obtained in static laboratory experiments, not accounting for natural mussel densities, boundary layer effects, flow rates or elevated algal concentrations. This study used large-scale Industrial flume trials to investigate the influence of these factors on zebra mussel filtration and proposes some novel Industrial applications of these findings. The flume trials revealed some of the highest zebra mussel clearance rates found to date, up to 574+/-20mlh(-1)g(-1) of wet tissue mass. Under low algal concentrations, chlorophyll a removal by zebra mussels was not proportional to mussel density, indicating that field rates of zebra mussel grazing may be much lower than previous studies have predicted. Increasing ambient velocities up to 100mls(-1) ( approximately 4cms(-1)) led to increased clearance rates by zebra mussels, possibly due to the replenishment of locally depleted resources, but higher velocities of 300mls(-1) (12cms(-1)) did not lead to further significant increases in clearance rate. When additional algal cultures were dosed into the flumes, chlorophyll a removal increased approximately logarithmically with zebra mussel density and there were no differences in the clearance of three different species of alga: Ankyra judayi, Pandorina morum and Cyclotella meneghinia. Some novel Industrial uses of these zebra mussel filtration studies are proposed, such as: (1) helping to inform models that predict the large-scale grazing effects of the mussels, (2) allowing estimates of zebra mussel densities in Industrial pipelines, and (3) constructing large-scale biofilters for use in Water clarification.

  • Zebra mussel filtration and its potential uses in Industrial Water Treatment.
    Water Research, 2007
    Co-Authors: Paul Elliott, David C Aldridge, Geoff D Moggridge
    Abstract:

    Abstract The zebra mussel ( Dreissena polymorpha ) is a notorious freshWater biofouling pest, and populations of the species can alter aquatic environments through their substantial filtration capabilities. Despite the ecological importance of zebra mussel filtration, many predictions of their large-scale effects on ecosystems rely on extrapolations from filtration rates obtained in static laboratory experiments, not accounting for natural mussel densities, boundary layer effects, flow rates or elevated algal concentrations. This study used large-scale Industrial flume trials to investigate the influence of these factors on zebra mussel filtration and proposes some novel Industrial applications of these findings. The flume trials revealed some of the highest zebra mussel clearance rates found to date, up to 574±20 ml h −1  g −1 of wet tissue mass. Under low algal concentrations, chlorophyll a removal by zebra mussels was not proportional to mussel density, indicating that field rates of zebra mussel grazing may be much lower than previous studies have predicted. Increasing ambient velocities up to 100 ml s −1 (∼4 cm s −1 ) led to increased clearance rates by zebra mussels, possibly due to the replenishment of locally depleted resources, but higher velocities of 300 ml s −1 (12 cm s −1 ) did not lead to further significant increases in clearance rate. When additional algal cultures were dosed into the flumes, chlorophyll a removal increased approximately logarithmically with zebra mussel density and there were no differences in the clearance of three different species of alga: Ankyra judayi , Pandorina morum and Cyclotella meneghinia. Some novel Industrial uses of these zebra mussel filtration studies are proposed, such as: (1) helping to inform models that predict the large-scale grazing effects of the mussels, (2) allowing estimates of zebra mussel densities in Industrial pipelines, and (3) constructing large-scale biofilters for use in Water clarification.

Bingru Zhang - One of the best experts on this subject based on the ideXlab platform.

  • Synergistic inhibition effect of polyaminoamide dendrimers and polyepoxysuccinic acid on silica polymerization
    Colloids and Surfaces A: Physicochemical and Engineering Aspects, 2012
    Co-Authors: Bingru Zhang, Peidi Sun, Chen Fang
    Abstract:

    Abstract Colloidal silica (SiO 2 ) is probably the most undesirable inorganic deposit formed in Industrial Water Treatment systems, either in bulk or on surfaces. Several reports have shown that generations 1 and 2 NH 2 -terminated polyaminoamide dendrimers (PAMAMs 1G and 2G) can efficiently inhibit colloid silica formation. PAMAM-1G is a more effective inhibitor compared with PAMAM-2. The present paper tests the effects of NH 2 -terminated PAMAMs (0G–2G) on colloid silica formation. The results show that PAMAM-0G is a most efficient inhibitor compared with PAMAMs 1G and 2G. However, polyepoxysuccinic acid (PESA) is introduced because a small amount of silica–PAMAM white insoluble floc precipitates appeared in the solution. PESA alone cannot inhibit silica polymerization. However, combined PESA and PAMAM can prevent white floc and improve the inhibition performance of PAMAM. The underlying mechanism for this phenomenon is investigated using zeta potentials and atomic force microscopy topography.

  • Synergistic effect of polycation and polyanion on silica polymerization
    Journal of colloid and interface science, 2011
    Co-Authors: Bingru Zhang, Shaohua Xin, Yuning Chen
    Abstract:

    Abstract Colloidal silica (SiO2) is perhaps the most undesirable inorganic deposit formed in Industrial Water Treatment systems. SiO2 can either be found in bulk or on surfaces, such as heat exchangers, pipelines, or membrane. Conventional mineral scale inhibitors cannot inhibit its formation. Chemical cleaning is difficult and not free from hazards. This paper reports the excellent inhibition efficiency of adipic acid/amine-terminated polyethers D230/diethylenetriamine copolymer (AA/AT/DE). However, a small amount of silica-AA/AT/DE white insoluble floc appears in the solution. To overcome this problem, polyepoxysuccinic acid (PESA) is introduced. PESA by itself cannot inhibit silica polymerization. However, the combination of PESA and AA/AT/DE cannot only prevent the white floc, but also improve the inhibition performance of AA/AT/DE. The underlying mechanism is investigated based on zeta potentials and atomic force microscopy topography.

Yuning Chen - One of the best experts on this subject based on the ideXlab platform.

  • Synergistic effect of polycation and polyanion on silica polymerization
    Journal of colloid and interface science, 2011
    Co-Authors: Bingru Zhang, Shaohua Xin, Yuning Chen
    Abstract:

    Abstract Colloidal silica (SiO2) is perhaps the most undesirable inorganic deposit formed in Industrial Water Treatment systems. SiO2 can either be found in bulk or on surfaces, such as heat exchangers, pipelines, or membrane. Conventional mineral scale inhibitors cannot inhibit its formation. Chemical cleaning is difficult and not free from hazards. This paper reports the excellent inhibition efficiency of adipic acid/amine-terminated polyethers D230/diethylenetriamine copolymer (AA/AT/DE). However, a small amount of silica-AA/AT/DE white insoluble floc appears in the solution. To overcome this problem, polyepoxysuccinic acid (PESA) is introduced. PESA by itself cannot inhibit silica polymerization. However, the combination of PESA and AA/AT/DE cannot only prevent the white floc, but also improve the inhibition performance of AA/AT/DE. The underlying mechanism is investigated based on zeta potentials and atomic force microscopy topography.