spreadsheet sedimentation area of thickener

Theory and Application of Thickener Design
2016-3-4 · thickener area calculations, the test procedure demonstrates the dependence ofthe flux curve on the system feed flux. At a given feed flux, there was good agreement between the solids flux curve determined by the method and continuous sedimentation results. The widely used method of Kynch was found to be
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On the method of thickener area calculation based on the ...
1986-1-1 · Consequently, the thickener area results in = Br~h. (8) Equation (8) allows to us evaluate Fth for the given ~ 0~ c2, h0 and 1* = h( r). The minimal flux of solids is then determined as SIXUJI=f2PS. (9) tth In other cases a sedimentation area can also be calculated based on the underfiow velocity v2.
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Calculation of thickener area and depth based on the data ...
1985-1-1 · The thickener area is directly obtained by differentiation of height-time relationship and thickener depth can be (13) evaluated by integration of the same relationship. t Timelt Fig. 2. Height-time relationship obtained from batch-settling test. The dependence of concentration of solids c upon height of interface h follows from the relation [8 ...
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A description of the sedimentation process during
2014-12-5 · A description of the sedimentation process during dynamic thickener operation A.J. Vietti and F. Dunn 2 Paste 2014, Vancouver, Canada consolidation theory was applied to the settling of compressible slurries (Shirato et al., 1970) which led
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Measuring Settling Rates and Calculating Thickener Capacity
2016-3-3 · The following is an illustration of the method used in computing the area and depth required in a thickener to handle 100 tons of pulp per day, thickening from 6 parts fluid to 1 part solids down to 1.12 parts fluid to 1 part solids. Fig.7-
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Lecture 4: Sedimentation
2012-3-28 · 4. Sedimentation in water Treatment 4.5 Design tanks 4.5.1 Plain Sedimentation: Example 4.2: Design pre‐sedimentation tanks to be used to remove grit and sand from a river water that is used to produce 20000 m3/d di kidrinking water .Use the overflow rate and
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(PDF) THICKENER DESIGN, CONTROL AND DEVELOPMENT
The common thickener underpins the performance of most hydrometallurgical facilities. Thickeners are simple, reliable, effective and efficient-under the right conditions.
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How to Size a Thickener - Mineral Processing & Metallurgy
2016-3-8 · Thickener area required is then calculated by applying above determined data in the following formula: A = 1.333 (F – D)/R. A = Thickener area in square feet per ton of dry solids thickened in 24 hours. F = Initial density
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GRAVITY THICKENING OF ACTIVATED SLUDGE
2016-8-9 · Critical in the design of the thickener area is the minimum solids handling capacity. Work done by Kynch [12] was quite important as it was the basis of many further studies of thickening.evaluation. Kynch carried out a theoretical analysis of concentration changes which can occur during sedimentation in a monodisperse suspension of rigid ...
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Calculate a Settling Tank's Capacity - Thickener
2016-3-3 · The determination of the settling area, required for any definite settling operation, is based on the principle that the elimination of water in the free-settling zone is a function of settling area and is independent of pulp depth. Expressed
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Most common problems in thickener operations
Thickener area. The thickener area depends on the mineral sedimentation rate (m2/t/d) or the specific feed rate (t/h/m2) which are determined by laboratory or pilot testing. These tests are carried out with representative samples of
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A Critical Review of Thickener Design Methods t
the flowrate of water per unit thickener area Q0 /S, that is the spatial water velocity in zone I of a continu ous thickener, must be equal to the rate of water formed in a batch sedimentation test with the same pulp at the concentration of the feed. Since this rate is equal to the rate of descent of the water-suspension
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Separation Processes: Sedimentation Separations
2014-9-9 · I Talmage and Fitch: tends to overdesign the area I Coe and Clevenger: underdesign of the thickener area [Svarovsky, 4ed, p 180] In practice: we will rely on outside consultants and civil engineers, most likely, to size and design the unit.
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ThICKENERS - TENOVA
2017-4-3 · thickener using a low head axial pump to drive dilution water into the feedwell. The main advantage of the Forced Dilution system is that it takes the overflow liquor from a large surface area - ne-gating the risk of causing localized high internal rise rates. The system then optimally mixes with the feed to produce
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Lecture 4: Sedimentation
2012-3-28 · 4. Sedimentation in water Treatment 4.5 Design tanks 4.5.1 Plain Sedimentation: Example 4.2: Design pre‐sedimentation tanks to be used to remove grit and sand from a river water that is used to produce 20000 m3/d di kidrinking water .Use the overflow rate and
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DETERMINING THICKENER UNDERFLOW ...
According to the sedimentation theory and experimental data, two mathematical equations for calculating underflow concentrations and unit area of a continuous thickener were derived. And a new procedure to design a continuous thickener was developed.
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GRAVITY THICKENING OF ACTIVATED SLUDGE
2016-8-9 · Critical in the design of the thickener area is the minimum solids handling capacity. Work done by Kynch [12] was quite important as it was the basis of many further studies of thickening.evaluation. Kynch carried out a theoretical analysis of concentration changes which can occur during sedimentation in a monodisperse suspension of rigid ...
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Chapter 5 Sludge treatment - Islamic University of Gaza
2011-9-10 · - The area of the thickener is determined using the mass loading criteria according to the sludge source as shown in the above table. - The depth of the thickener is determined as follows. As shown in Figure (4), the thickener depth is divided to the following regions:-
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Improve Clarifier and Thickener Design and
2021-2-19 · The thickener area is also required for this calculation. Guess the thickener area for the first iteration. Several iterations of area may be required to achieve a practical thickener size and pumping rate. For a circular thickener
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(PDF) Kynch Theory of Sedimentation
2022-1-28 · A Theory of Sedimentation. Article. Jan 1952. Trans Faraday Soc. G J Kynch. The theory assumes that the speed of fall of particles in a dispersion is
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Sedimentation | PDF | Continuum Mechanics | Physical
2016-3-22 · Thickener Area and Depth (a) A 100 g CaCO3 per liter slurry is fed to a thickener at the rate of 30 tons of dry solids per hour to produce a thickened sludge of 350 g CaCO3 per liter. Specify the thickener area required. (b) Estimate the
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A Model of Continuous Sedimentation of Flocculated ...
2006-7-31 · The chief purpose of this paper is to formulate and partly analyze a new mathematical model for continuous sedimentation-consolidation processes of flocculated suspensions in clarifier-thickener units. This model appears in two variants for cylindrical and variable cross-sectional area units, respectively (Models 1 and 2).
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ThICKENERS - TENOVA
2017-4-3 · thickener using a low head axial pump to drive dilution water into the feedwell. The main advantage of the Forced Dilution system is that it takes the overflow liquor from a large surface area - ne-gating the risk of causing localized high internal rise rates. The system then optimally mixes with the feed to produce
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A Critical Review of Thickener Design Methods t
the flowrate of water per unit thickener area Q0 /S, that is the spatial water velocity in zone I of a continu ous thickener, must be equal to the rate of water formed in a batch sedimentation test with the same pulp at the concentration of the feed. Since this rate is equal to the rate of descent of the water-suspension
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Thickening Agent - an overview | ScienceDirect Topics
Two criteria are needed to specify sedimentation requirements: the thickener surface area and the thickener depth. Theoretically, the behavior (and thus the area) of a thickener can be analyzed by the Kynch flux analysis. The sedimentation flux ψ s is the mass of material passing through unit area per unit time and is given by
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DETERMINING THICKENER UNDERFLOW ...
According to the sedimentation theory and experimental data, two mathematical equations for calculating underflow concentrations and unit area of a continuous thickener were derived. And a new procedure to design a continuous thickener was developed.
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(PDF) Kynch Theory of Sedimentation
2022-1-28 · A Theory of Sedimentation. Article. Jan 1952. Trans Faraday Soc. G J Kynch. The theory assumes that the speed of fall of particles in a dispersion is
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Activated Sludge Secondary Clarifier Design Spreadsheets
This Excel spreadsheet can handle primary and secondary clarifier surface area calculations and determine diameter for circular clarifier(s) or length and width for rectangular clarifier(s) and is available in either U.S. or S.I. units at a very low
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Improve Clarifier and Thickener Design and Operation
2021-2-19 · The thickener area is also required for this calculation. Guess the thickener area for the first iteration. Several iterations of area may be required to achieve a practical thickener size and pumping rate. For a circular thickener
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Separation Processes: Sedimentation Separations
2014-9-9 · I Talmage and Fitch: tends to overdesign the area I Coe and Clevenger: underdesign of the thickener area [Svarovsky, 4ed, p 180] In practice: we will rely on outside consultants and civil engineers, most likely, to size and design the unit.
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