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Showing 1 to 20 of 540 for “"residence time"”.
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Residence time in coastal canopies
… believed to be the dominant process controlling residence time and, therefore, exchange. However, experiments have shown that wave-driven flows over rough boundaries, such as canopies, generate strong onshore mean currents (75% of the orbital velocity far above the canopy) near the canopy top. …
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A Novel Approach To Residence Time Distribution
… in a fluidized bed riser to determine the Residence Time Distribution (RTD) of solids flow within a fluidized bed riser. The instrument was implemented in a dual-stage transparent scale model fluidized bed riser. Testing of the instrument system validated the functionality of the …
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Wastewater treatment in soil: effect of residence time
… wastewater as a function of the length of time the wastewater remained in the root zone. A digital simulation model was used as an aid in describing soil water (and wastewater) movement through the root zone under wet conditions (i.e. root zone 50- 75% saturated). A procedure was developed …
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Phytoplankton induced changes of air bubble residence time in seawater
… remain in the water for different periods of time. Knowledge of the factors accounting for the differences in air bubble residence time (BRT) is essential for understanding processes of air sea-gas exchange as well as for the detection of underwater ship wakes in defence applications. Reasons …
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Residence time distributions in continuous flow emulsion liquid membrane extractions
Includes bibliographical references.
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The characterisation of the hydrodynamic vortex separator using residence time distribution analysis.
… kinetic processes efficiency. This project used residence time distribution (RTD) analysis to extensively characterise the mixing regime within a model and prototype HDVS. The HDVS was operated with and without a baseflow component and with and without the sludge hopper for a range of inlet flow …
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Interspecific wood trait variation predicts decreased carbon residence time in changing forests
… Fraxinus spp. (T1/2 = 47.4). At multi-decadal timescales, wood traits, notably taxon initial wood C:N ratio and Mn concentration, outweighed environmental factors in explaining variation in decay rates. A significant interaction between soil pH and wood Mn, which co-regulate microbial lignin …
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Residence Time Distributions in Constructed Wetlands and Their Application to Modeling Nitrate Removal
Nitrate was used as a on-conservative compound along with a conservative compound to assess mass transport at the soil-water interface. Calibration of these tests yielded nitrate mass transfer coefficients. Even though no particular trend was observed for the nitrate mass transfer coefficients, the …
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Residence time investigation of artificial silver ores in heap leaching using cyanide lixiviant
… and tank leaching. However, it is at the same time characterized by extended leaching periods due to slow mineral conversion and low rates of recovery as a major challenge. Interactions within the heap bed are not fully understood as chemical leaching and hydrodynamics interact in a complex …
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The Influence of Residence Time and Organic Acids on the Desorption of Goethite
… of this study was to examine the influence of residence time and organic acids on the desorption of Pb2+and Cd2+ from goethite. Adsorption experiments were conducted at pH 6.0. Lead adsorption was nearly completed after 4 hours, with very little additional sorption during a 20-week period. In …
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Drivers of Spatial Dispersion and Residence Time of Coarse Sediment in Gravel-Bed Rivers
… streamwise and vertical directions. While travel times of sediment in the channel are brief, rest times between periods of mobilization can be relatively extensive. Both phases of transport are investigated with a focus on physical drivers and interactions between dispersive behavior and …
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Effect of Cell Residence Time on the Extracellular Organic Compounds in Activated Sludge Suspensions
Made available in DSpace on 2014-12-13T19:31:23Z (GMT). No. of bitstreams: 1 7606943.pdf: 9355600 bytes, checksum: 51dbb751279d37bded88aba37ce90a71 (MD5) Previous issue date: 1975
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Measurements of heat transferred and residence time of a droplet on a hot surface
Restriction data tranferred 2014-07-01T11:36:18-05:00 Original Data Group with Access UIUC Users [automated] Release Date: 2015-05-24 17:18:31 UTC Reason: Author requested U of Illinois access only (OA after 2yrs) in Vireo ETD system
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Redesign of Industrial Column Flotation Circuits Based on a Simple Residence Time Distribution Model
The potential for improved selectivity has made column flotation cells a popular choice for upgrading fine coal. Unfortunately, recent production data from full-scale column plants indicate that many industrial installations have failed to meet original expectations in terms of clean coal recovery. …
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Effect of mean cell residence time on the acid hydrolytic assist activated sludge process
… aeration process. The effect of mean cell residence time, Θ<sub>c</sub>, on an activated sludge process utilizing hydrolysis had not been evaluated. Also, only limited information is currently available regarding the kinetics of wastewater treatment with the hydrolytic assist activated …
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Effect of mean cell residence time on the base hydrolytic assist activated sludge process
Treatment of municipal and industrial wastewaters results in the production of wastes in the form of sludge. Since the quantity and characteristics of sludge depend upon the degree of treatment, the upgrading of treatment facilities has had the effect of increasing sludge production. Since the …
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The effect of mean cell residence time on the dewatering characteristics of a biological sludge
The effect that mean cell residence time (MCRT) had on the dewaterability of biological sludges was examined in this study. Aeration basin sludge and waste activated sludge from a full scale domestic wastewater treatment facility, in addition to sludges produced from two laboratory scale reactors …
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