thickener operating parameters

Design and Operation of Final Clarifiers
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most important operating parameters since it directly impacts clarifier SLRThe design MLSS is typically selected based on the solids inventory required to m eet process obj ec-tive s Mi xed - l i qu or concentrations signif-icantly less than 1 000 mg/L do not set t l e well while mixing and ox ygen tra n s fer may become limiting at MLSS...
TECHNOLOGY FACT SHEETS FOR EFFLUENT TREATMENT
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26- Operating problems 3- THICKENING BY CENTRIFUGATION/BY CENTRIFUGES 31- Fundamentals of thickening by centrifuges 32- Utility and applicability 33- Design 331- Design parameters 332- Design criteria 34- Specific technical considerations 35- Expected results 4- THICKENING WITH BAND FILTERS BY GRAVITY BELT THICKENERS 41-...
PDF Understanding the Thickening Process
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the modelling of operational thickeners using these parameter inputs Th is has produced an enhanced level of understanding of the factors that are important to thickener operation and provided a...
Critical parameters to determine mean bubble size of
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May 14 2013 0183 32 The filtration performance of filter media fabricated by foam coating technology is highly dependent upon their pore siz Therefore we investigated the effect of the mixing ratio of combined coating components PTFE emulsion a foam stabilizer a foaming agent and a thickener and operating parameters feed rate of coating solution air flow rate mixing speed and cooling...
Beginners guide to thickeners
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Jun 16 2017 0183 32 The measurable parameters that can be used for thickener control include thickener feed flow rate feed density underflow density overflow clarity bed level bed mass rake torque rake height solids settling rate and underflow rehology Operating thickeners for extended periods at high torque levels can negatively impact on gearbox and...
Considerations and Parameters in Thickener Selection
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Thickeners are used extensively for slurries generated by flue dust from wet scrubbers Thickeners in flue dust applications are operating with considerable variations treating blast furnace dust BOF flue dust and wood char Similar applications are met in the...
Physical and Biological Properties
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Jan 06 2021 0183 32 For example a gravity thickener floatation thickener or centrifuge thickener may be substituted for the gravity belt thickener However the appropriate characteristics of the processed sludge and solids capture efficiencies shown in Tables 28 and 29 should be used in the mass balance computations Operating parameters RAS and WAS...
Thickener Selection Parameters
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Table of ContentsFeed WellsRakesTank Areas A bewildering number of continuous thickeners and clarifiers are used in mineral industries and other heavy industri General types are Conventional Thickeners Thickeners with Flocculating Feedwells Solids Contactors Tray Thickeners Lamellas Conventional Thickeners with Lamellas High Flow Fluid Bed Thickeners...
Outotec Thickening technologies
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affecting operating parameters including Underflow Density and Bed Level Outotec® High Rate Thickener control Control solution The disturbances can be controlled by means of a feedforward algorithm equipped with adaptive tuning functionality to allow optimal feedforward gain to be ®...
Theory and Application of Thickener Design
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operating line The slope of this line is equal in value to the underflow velocity and the line is a tangent to the solids flux curve A thickener operating with such an underflow velocity should have an underflow concentration Cu as shown By material balance the underflow solids flux...
Improve Clarifier and Thickener Design and Operation
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A design method for thickeners and clarifiers known as the batch flux curve technique was developed over 20 years ago but still is not well-known in design and operating circl An informal survey of major clarifier and thickener manufacturers found that none of the firms surveyed use this method for sizing and maximizing operating conditions...
Gravity Sedimentation Thickeners And Clarifiers
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Cross-sectional view of a thickener and nearly identical configurations and comparable operating parameters can be found throughout the world The photograph shown in Figure 7 is an installation at a Russian municipal wastewater treatment plant where in fact the operation was a part of an auto-making facility that also provided sanitary...
Peripheral Roller Transmission Thickener Thickener
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This thickener consists of the round thickener and harrow scrapping machine the solid particles suspend in thickener settling by gravity the pulp in the upper turn into clean water so that the separation can be realized The slime that sediment in the bottom of the thickener is discharged by the harrow scrapping continuously and clean overflow from the upside...
Most common problems in thickener operations part 2
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This results in unstable thickener phases clear interface and mud layers see figure 4 As a rule of thumb in conventional thickeners the interface level should be kept between 05 to 10 m below the surface On the other hand the mud level should be kept between 20 to 30 m over the thickener...
PDF Numerical study of flocculation settling and
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key operating parameters on waste clay thickening performance and the influence of feed rate sand addition rate bed depth and flocculant dosage were Deep-cone thickener a kind of such...
Controlled Aerobic Digestion of Thickened Sludge
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Dec 28 2000 0183 32 Oxygen Requirements When thickened sludges are fed to the aerobic digester the oxygen uptake rate in the first part of the digester is extremely high with as much as 70 of the total oxygen requirement needed in the first ten days The aeration system must be designed so that there is enough built-in flexibility to ensure that the oxygen profile in the basin matches the oxygen demand...
CHAPTER 3 SLUDGE THICKENING
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A thickener operates pretty much like a settling tank The feed enters from the middle are distributed radially the settled sludge is collected from the underflow the effluent exits over the weirs In a continuously operated thickener there are different zones of concentration The topmost dear zone is free of solids and comprises the...
Sludge Dynamic thickening
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However in thickening mode the main operating parameters are those detailed below operation at a high V R 15 to 30 rpm low torque and therefore the need for alternative automation systems for stable operation inlet mass flow can be measured so that the amount of polymer can be adjusted V R or pool depth can be regulated according to...
mineral processing thickener operation manual
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The thickener operation can be a batch or continuous process with either Differential settling due to differences in shape size or composition of mineral thickener operation manual Archives Mineral Processing Running a thickener properly isn 39 t as easy as it looks...
Thickener Design pdf Mining Thickener Thickener Tank
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This thickener adopts flocculation technology The slurry is directly input into the compression zone of the thickener to form a filter bed in the pool The fine particles in the slurry input from the bottom that are not flocculated are washed up by the water flow through the filter bed layer...
Fact Sheet Centrifuge Thickening and Dewatering US EPA
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Jun 17 2020 0183 32 Centrifugal thickening and dewatering of sewage sludge is a high speed process that uses the force from rapid rotation of a cylindrical bowl to separate wastewater solids from liquid to produce a non-liquid material referred to as cake...
Thickener modeling From laboratory test work to plant
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This paper presents a flocculation kinetics based dynamic thickener simulation model and a procedure to calibrate the model parameters With the model the underflow stream composition can be simulated over time as a function of the thickener operating parameters which are the feed rate and composition underflow pumping rate flocculant...
Thickener Application BASF Intelligent Mine
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The thickener circuit is usually the most chaotic and unstable process on a mineral processing plant This means control is usually reactive when parameters such as torque or over...
Thickener Circuit Intellisenseio
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The Thickener Circuit Optimization Application starts by accurately tracking and predicting the geometallurgical and physical properties of the feed material in real time Virtual Sensors are generated using an asset specific library of mathematical models to determine missing engineering parameters in...
Control strategies for minerals thickening part 1
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The objective of control is to keep a stable of solids in the thickener underflow discharge while the internal layers of clear water pulp interface and thickened mud bed layer figure 1 are kept in defined ranges and the mechanically operated torque is kept within safe operating parameters...
Thickener 2
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The thickener unit acts as a solid/liquid splitter The user defines the operating parameters Flowchart The following diagram shows the sequence of events in the Thickener 2 model Data Sections The default access window consists of a number of sections Thickener2 - contains general information relating to the unit...
PDF Steady state thickener modelling from the
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For a number of operating industrial thickeners processing flocculated red mud the thickener dimensions operating parameters and characterised material properties have been used as inputs to the steady state thickening algorithm by Usher 2 The predictions of solids flux versus underflow solids concentration highlight that most thickener...
Thickening tests
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Capabiliti Static and dynamic thickening test data can be collected to determine thickener sizing and operating parameters The type of testing to be conducted will be determined by both the type of thickener desired conventional high-rate high-density etc and by...
Outotec Thickening technologies
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operating parameters including Underflow Density and Bed Level Outotec High Rate Thickener control Control solution The disturbances can be controlled by means of a feedforward algorithm equipped with adaptive tuning functionality to allow optimal feedforward gain to be set This results in stable solids inventory ie bed...
Sludge Thickening Technologies Reduce Wastewater COD and
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Increasing the concentration of polymer further and again adjusting the decanter centrifuge operating parameters will thicken the feed and produce stackable solids at 12 -dws And once the operating conditions are optimized the decanter centrifuge will control the solids discharge with the automatic adjustment of scroll speed...

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