Characterization of ballasted flocs in water treatment
Characterization of ballasted flocs in water treatment using microscopy. Ballasted flocculation is a separation process commonly used to remove particulate matter in diverse water treatment applications such as drinking water, storm water and industrial and municipal wastewater treatments. The repeatability of the proposed microscopy
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Characterization of ballasted flocs in water treatment
Ballasted flocculation is widely used in the water industry for drinking water, municipal wastewater, storm water and industrial water treatment. This gravity-based physicochemical separation process involves the injection of a ballasting agent, typically microsand, to increase the floc density and size.
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Characterization of ballasted flocs in water treatment
Characterization of ballasted flocs in water treatment using microscopy. Ballasted flocculation is widely used in the water industry for drinking water, municipal wastewater, storm water and industrial water treatment. This gravity-based physicochemical separation process involves the injection of a ballasting agent, typically microsand, to
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Characterization of ballasted flocs in water treatment
Request PDF | Characterization of ballasted flocs in water treatment using microscopy | Ballasted flocculation is widely used in the water industry for drinking water, municipal wastewater, storm
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Characterization of Filamentous Flocs to Predict
In wastewater treatment plants, the degradation of complex substances that contaminate water is carried out by microorganisms, which are fixed by a network formed by filamentous bacteria, creating large flocs that settle easily. However, the excessive growth of said bacteria causes a series of drawbacks such as the reduction of settling velocity, leakage of activated sludge with the effluent
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Laboratory study of ballasted flocculation | Request PDF
Ballasted flocculation, a process consisting in injecting micron-sized granular media to increase the specific gravity and size of flocs, is being increasingly used in the water treatment industry
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Evaluation of floc settling velocity models through image
Y.M.S. Park, J.-O. Kim, Evaluation of the image analysis method using statistics for determining the floc size and settling velocity in ballasted flocculation, Desal. Wat. Treat., 99 (2017) 102–106. M. Lapointe, B. Barbeau, Characterization of ballasted flocs in water treatment using microscopy, Water Res., 90 (2016) 119–127.
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Floc compaction during ballasted aggregation - ScienceDirect
In water treatment, the primary objective of coagulation-flocculation process is to gather the finely divided matter suspended in the raw water within large flocs that can settle rapidly. However, because of the fractal organization of flocs, the aggregate growth is necessarily accompanied by a decrease in floc density which impairs the
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Benoit Barbeau - Members - CentrEau
Voir les détails de Characterization of ballasted flocs in water treatment using microscopy Comparison of pyrolucite fixed and fluidized beds for iron and manganese control in groundwater: a pilot-scale study
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US Patent Application for Ballasted Clarification System
In general, the present invention is directed to systems and methods of providing improved ballasted clarification systems for the treatment of water or wastewater. In accordance with some embodiments, a method may include introducing an influent including the water or wastewater and a coagulant; agitating or mixing the influent causing flocs to develop; introducing polymer and ballast wherein
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CA2796713A1 - Method for treating water by ballasted
The invention relates to a method for treating water by weighted flocculation including a step of injection into said water of at least one flocculation agent, a step of injection into said water of at least one particulate material which is denser than water, and a step of recovery of a treated water, characterized in that said weighted flocculation is used under stirring using a mean speed
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Water | Free Full-Text | Removal Effectiveness
Ballasted flocculation is typically used in drinking water treatment processes to remove fine particles; however, there are also applications in wastewater and combined sewer overflow treatment. Microsand, with a density of approximately 2700 kg/m 3 , is incorporated into the coagulation-flocculation-settling regime typically used for water
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JUST-IN-TIME SISTEMOS ĮDIEGIMO GALIMYBĖS LAIVŲ
Lapointe M., Barbeau B. Characterization of ballasted flocs in water treatment using microscopy. Water Research. Vol. 90. P. 119–127. Lafontaine Y., Despatie S.P., 2014, Performance of a biological deoxygenation process for ships' ballast water treatment
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Water | Free Full-Text | Charge Neutralization Mechanism
Most of the water supplied in Brazil comes from water streams that may have higher values for apparent color than turbidity. Treatability trials were performed for color and turbidity removal to evaluate the advantages of coagulation during the charge neutralization mechanism when compared to sweep flocculation for water with those characteristics.
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Activated starch as an alternative to polyacrylamide-based
Activated starch polymer manufactured from potato starch is recognized to be non-toxic, biodegradable, and cost-effective (Lapointe & Barbeau 2015).To activate the product, dry starch polymer needs to be dissolved into water using a high shear rotating impeller (approximately 3,000–3,500 rpm) until a homogeneous solution is obtained in approximately 15–30 min.
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Stoichiometry of Coagulation - Stumm - 1968 - Journal
The objectives of this study were to examine the adsorption of coagulants on the colloids present in water and to interpret this adsorption in terms of coagulation and restabilization; and, based upon a consideration of chemical and electrostatic interactions in the destabilization of colloids, to develop a conceptual model relating optimum coagulation with pertinent solution variables.
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Floc characterization Publications | PubFacts
Ballasted flocculation is widely used in the water industry for drinking water, municipal wastewater, storm water and industrial water treatment. This gravity-based physicochemical separation process involves the injection of a ballasting agent, typically microsand, to increase the floc density and size.
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Benoit Barbeau - Members - CentrEau
Voir les détails de Characterization of ballasted flocs in water treatment using microscopy Comparison of pyrolucite fixed and fluidized beds for iron and manganese control in groundwater: a pilot-scale study
Get Price
Water | Free Full-Text | Charge Neutralization Mechanism
Most of the water supplied in Brazil comes from water streams that may have higher values for apparent color than turbidity. Treatability trials were performed for color and turbidity removal to evaluate the advantages of coagulation during the charge neutralization mechanism when compared to sweep flocculation for water with those characteristics.
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Using magnetic powder to enhance coagulation membrane
Magnetic-enhanced coagulation (MEC) has applied in water treatment and purification, it is an effective enhanced coagulation technology (Gokon et al. 2002; Hu et al. 2012; Wang et al. 2013a, b; Yong et al. 2013).The mechanism of MEC is described briefly in Figure 1.The diminutive floc formed in the conventional coagulation process is gradually accrescent with the addition of magnetic powder (MP).
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JUST-IN-TIME SISTEMOS ĮDIEGIMO GALIMYBĖS LAIVŲ
Lapointe M., Barbeau B. Characterization of ballasted flocs in water treatment using microscopy. Water Research. Vol. 90. P. 119–127. Lafontaine Y., Despatie S.P., 2014, Performance of a biological deoxygenation process for ships' ballast water treatment
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Stoichiometry of Coagulation - Stumm - 1968 - Journal
The objectives of this study were to examine the adsorption of coagulants on the colloids present in water and to interpret this adsorption in terms of coagulation and restabilization; and, based upon a consideration of chemical and electrostatic interactions in the destabilization of colloids, to develop a conceptual model relating optimum coagulation with pertinent solution variables.
Get Price
Floc characterization Publications | PubFacts
Ballasted flocculation is widely used in the water industry for drinking water, municipal wastewater, storm water and industrial water treatment. This gravity-based physicochemical separation process involves the injection of a ballasting agent, typically microsand, to increase the floc density and size.
Get Price
JUST-IN-TIME SISTEMOS ĮDIEGIMO GALIMYBĖS LAIVŲ
Lapointe M., Barbeau B. Characterization of ballasted flocs in water treatment using microscopy. Water Research. Vol. 90. P. 119–127. Lafontaine Y., Despatie S.P., 2014, Performance of a biological deoxygenation process for ships' ballast water treatment
Get PriceBreakage and Re-formation of Alum Flocs | Environmental
Using the experimentally determined optimum dosage of aluminum sulfate, the breakage of flocs was followed at different stirring speeds, corresponding to average shear rates (G) of about 180 and 520 s-1. Most of the breakage occurred within a few seconds of increasing the shear rate.
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gravity gradient - meddic
Characterization of ballasted flocs in water treatment using microscopy. Lapointe M1, Barbeau B2. Water research.Water Res.2016 Mar 1;90:119-27. doi: 10.1016/j.watres.2015.12.018. Epub 2015 Dec 15. Ballasted flocculation is widely used in the water
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Laminar and turbulent shear‐induced flocculation
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Coagulation experiments were performed by jar-tester using the kaolin based synthetic water. The effects of three independent variables (pH, PAC, and ballast) on response variables (turbidity removal rate and average settling velocity of flocs) and the optimum condition of independent variables to induce the optimum flocculation were obtained by 17 experimental conditions designed by Box
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US20050127008A1 - Systems and methods for water
Systems and methods for polymer addition control for sludges from water and wastewater treatment. In a treatment process where flocculating agents are used to promote solids aggregation, intrinsic physical properties of the liquid rich stream following separation may be continuously measured in order to control or optimize the amount of flocculating or treatment agent that is added to the process.
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Viau settled water, caused mainly by ballasted flocs, where microsand has an important effect in pore clogging. For the 152 m SS strainer, was the intermediate pore blocking, caused mainly by un-ballasted flocs agglomeration. The total suspended solids concentration was the best predictor of the fouling coefficient (k v) obtained from modeling.
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