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Showing 1 to 16 of 16 for “"Settling rate"”.
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Particle dispersion in isotropic turbulence and unsteady particle dynamics at finite Reynolds number
… of particle motion for particles with large settling rate and with response time comparable to the turbulence integral time scale.
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On the Response of a Spherical Particle to Unsteady Flows at Finite Reynolds Numbers
… effect of turbulence on the motion of a freely settling particle is also investigated. In all cases considered, the inertial response time of the particle is the same as the Kolmogorov time scale of the freestream turbulence. Over the parameter range considered, turbulence is found to have a …
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Vertical Transport of Sediment from Muddy Buoyant River Plumes in the Presence of Different Modes of Interfacial Instabilities
… of various physical phenomena influencing the rate at which sediment is removed from the plume. Previous laboratory and field measurements have suggested that, at times, sedimentation can take place at rates higher than that expected from individual particle settling (i.e., C{W}_{s}). Two …
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Variations in waste load allocations through sensitivity analysis of the QUAL-II water quality model on the South River, Virginia
… the QUAL-II water quality model. The reaeration rate, the ammonia nitrogen oxidation rate, and the carbonaceous deoxygenation coefficient were found to be highly sensitive in the model. Only moderate sensitivity was found with the areal flow contribution, the oxidation rate of nitrite nitrogen, …
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Active and Passive Settling By Marine Benthic Nematodes
… the settlement of marine benthic nematodes. The settling rates of three estuarine benthic nematode taxa were examined in a linear flume using two treatments defined by the type of sediment bed placed in the flume. One treatment bed contained sediments rendered "unattractive" by boiling. The other …
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Separation of fission products from irradiated uranium by peroxide precipitation
… uranium peroxide, should settle at a rate which will allow a continuous processing method to be employed.</p><p>A secondary objective was to discover a technique which would improve the existing purification procedures presently in use substituting on precipitation where two or more …
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Determination of sediment, water quantity and quality for swat modelling of sedimentation in the Makoye reservoir, southern province, Zambia.
… determine the short-term real time sediment settling rate in the Makoye Reservoir; (iv) examine concentration levels of selected physical and chemical parameters of water for livestock in Makoye Reservoir; (v) evaluate the efficiency of Soil Water Assessment Tool in simulating sedimentation …
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An Improved Prescribed Wake Analysis for Wind Turbine Rotors
… are quantitatively tracked for twenty-seven separate test conditions. Three pitch angles are used (-8°, -3° and 3°). Three tip speed ratios are examined (2, 5 and 10). Finally, data for rotors with one, two and three blades are presented. The pitch of the ensuing helical wake is found …
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A comparison of sludge properties and kinetic differences between a pure oxygen system and a conventional system
… air activated sludge unit was also operated as a direct comparison. Settling tests were run in three different cylinders with increasing diameters to collect data on the sidewall effects in addition to the settling rates. The settling velocities were also calculated and the average …
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Precipitation, Aggregation, and Settling of Asphaltenes from n-Alkane Diluted Bitumens
… involve the precipitation, aggregation, and settling of asphaltenes from solvent diluted bitumen. Models and data that include the effect of solvent type, concentration, shear, and contact time on asphaltene precipitation and settling are required to design and optimize these processes but …
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An investigation into the precipitation of Fe(III) oxyhydroxides in lime neutralization processes
… process. The HDS process is affordable to operate and has the potential benefit of the Fe(III) oxyhydroxide precipitates removing other pollutants through coprecipitation and adsorption, but it has its own shortcomings. These include, but are not limited to, the tendency of lime to be affected …
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Effects Of Environmental Factors On Anaerobic Granular Sludge In Upflow Anaerobic Sludge Blanket Reactors
… factors (micronutrients and toxicants) on high rate anaerobic digestion and anaerobic granular sludge were studied in laboratory-scale (20 litres) and bench-scale (1.2 litres) upflow anaerobic sludge blanket (UASB) reactors.;The anaerobic bacteria, when grown in feed lacking iron and cobalt, …
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Stability and precipitation of diverse nanoparticles
… which is attributed to the supersaturation generated by different solubility of a solute in the solvent/antisolvent. Based on particle size distribution, zeta potential as well as the aggregation kinetics, the water dispersed DNDs are found to be relatively stable in aqueous solutions, but …
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Laboratory Experiments on Mud Flocculation Dynamics in the Fluvial and Estuarine Environments
… can undergo changes in their size, shape, and settling velocity in response to environmental drivers such as turbulence, sediment concentration, organic matter (OM), and salinity. Some have assumed that salt is necessary for floc formation, and that mud, therefore, reaches the estuary …
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Development of Transitional Settling Regimen Parameters to Characterize and Optimize Solids-liquid Separation Performance
Novel settling characteristic metrics were developed based on the fundamental mechanisms of coagulation, flocculation, and settling. The settling metrics determined parameters that are essential in monitoring and optimizing the activated sludge process without the need for expensive or specialized …
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Improved Microalgal Biomass Harvesting Using Optimized Environmental Conditions and Bacterial Bioflocculants
… among many other factors. Bioflocculation and settling of suspended microalgae cultures is a harvesting method with potentially low cost and energy input. However, bioflocculation (the spontaneous flocculation of algal cells without chemical addition) has not been a reliable process with …