• Thickening

    Drum Thickener Reliable thickening and dewatering of pulps The performance of the gravity drum thickener is based on decades of experience in thickening The ANDRITZ Drum Thickener is a simple cost efficient and reliable filter for applications in a consistency range of 0.5–5.0 .

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  • Thickener Clarifier Level Control Solutions

    HAWK has designed and developed a wide variety of precision instruments for thickener and clarifier control Whether there are varying densities hydraulic imbalance suspended solids and build up HAWK has the ability to measure and monitor bed levels accurately.

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  • PDF

    Formula Sheet for all Wastewater Operator Exams Revised 8

    1 Formula Sheet for all Wastewater Operator Exams Revised 8/15 F001 Surface area of a pond acres = Length ft x Width ft 43560 F002 Volume of a pond MG =

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    Rotary Drum Thickener

    Sludge thickening for example can reduce 192 000 gallons of sludge per day down to 13 400 gallons by thickening 0.5 feed to 7 The higher concentration of solids equates to more pounds of solids stored in the same volume area The industry leading Parkson ThickTech Rotary Drum Thickener RDT with over 300 installations consumes the

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    TECHNOLOGY FACT SHEETS FOR EFFLUENT TREATMENT

    Hydraulic loading rate and solids load are the main design parameters Hydraulic loading rate it is based on the real flow through the unit that is which goes by the perimetral discharge weir s outflow 4 L 3 # Where HLR = Hydraulic loading rate m/h Q = sludge flow sent to the thickening unit m3/h A = horizontal thickener surface

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  • Developing MudMax for Paste Thickener Bed Level Measurement

    Developing MudMax for Paste Thickener Bed Level Measurement Numerous studies and papers have been devoted to the subject of thickener design and operation to achieve specified throughput and discharge densities Mathematical models have been developed that present methods for sizing thickeners and predicting performance under varying

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  • Beginners guide to thickeners

    Jun 16 2017  Beginners guide to thickeners Thickening is a process where a slurry or solid liquid mixture is separated to a dense slurry containing most of the solids and an overflow of essentially clear water or liquor in leaching processes The driving force for the separation is gravitational where the differences in phase densities drive the

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  • FL high density thickeners optimise recoveries at

    Mar 29 2021  These units deliver high solids underflow to optimise the recovery of dissolved metals according to FL In addition to the steeper floor slope these thickeners were designed with a high torque ring gear drive design with high tolerances that make for minimal maintenance over long periods of time the company says.

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    Thickeners

    The dense Thickener solids are raked to the thickener’s underflow cone and are removed via a slurry pump through the underflow pipe Underflow slurry densities can vary based on the type of material being processed size distribution of solids being settled or other process factors but as a general rule range from 35 50 solids by weight

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  • Conventional Thickeners

    The torque capability of a thickener drive is specified as Duty Rating being the maximum mechanism design strength or the 100 setting on the Torque Control Box The torque in turn depends on a K factor and the thickener diameter based on the following formula Torque

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  • Paste Thickener Design to Achieve Downstream Requirements

    Starting with the deposition design pumping and pipe and thickener design were evaluated in an iterative fashion to design a system based on the same rheology The thickening study identified significant variations in the particle size distribution PSD

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  • Thickeners

    Thickeners The separation of solids from a liquid by gravity sedimentation has traces to the early days of civilization The normal practice at those times was to use jars or pits mainly for the clarification of extracted liquids such as wine or olive oil from contaminating insoluble matter These batch processes required four separate steps

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  • Circular Clarifiers Thickeners

    This design is intended for secondary biological or flocculated solids which are more fluidized and have lower densities than primary wastewater and heavy industrial sludge Suction Header Suction header clarifiers rely on differential head pressure to collect settled solids from the tank floor.

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  • Thickening agent

    A thickening agent or thickener is a substance which can increase the viscosity of a liquid without substantially changing its other properties Edible thickeners are commonly used to thicken sauces soups and puddings without altering their taste thickeners are also used in paints inks explosives and cosmetics. Thickeners may also improve the suspension of other ingredients or emulsions

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    Solid Liquid Separation

    Solids g / l The Rheomax DR range of products produce an underflow with a lower yield stress which is more tolerant to fluctuations in solids content and applied shear resulting in a more consis­ tent thickener performance over a wide range of operating parameters 0.0

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  • Physical and Biological Properties

    Nov 08 2021  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

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  • PDF

    CHAPTER 12 Sludge Processing and Disposal

    Thickener solids loading rates vary with the type of sludge Some typical solids loading rates are given below in Table 12 2 These values shall be used for design unless other acceptable data are submitted For loading rates of other type sludges refer to Table 5.2 of the EPA Process Design Manual Sludge Treatment and Disposal Table 12 2

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  • PDF Thickener Waste Management in Mineral Processing To

    Advances in equal to the total capacity of the reservoir during the Solid Liquid separation 63 77 1986 necessary time for pulp concentration that reaches the proper 19 Moncrieff A.G Theory of Thickener Design Based on Batch Sedimentation Tests.

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  • PDF THICKENER DESIGN CONTROL AND DEVELOPMENT

    Most thickener design is based on a combination of batch and continuous bench top testing maldistribution of solids sett ling across the thickener and as sisted by the floor slope Unless the

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  • Changes in underflow solid fraction and yield stress in

    Feb 11 2021  The trouble free and efficient operation of paste thickeners requires an optimal design and the cooperation of each component When underflow discharging is suspended alleviating the vast torque that the remaining solids within the thickeners may place on rakes mainly lies in the circulation unit The mechanism of this unit was analyzed and a mathematical model was developed to describe

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  • Thickening at Karara

    Increased solids flux and rise rates in the testing process proved very successful resulting in signifi cantly reduced thickener sizes and lower capital expense.Mechanical design considerations such as removal of underflow and pump access led to a preference for an above ground thickener confi guration and the economics of a

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    Low Energy Non Shear WAS Thickening for Grand Rapids

    Volute/Screw Thickener Design Basis Parameter Design Basis Number of Units 3 Peak Feed Rate per Unit 450 GPM Influent Solids Concentration 0.5 Maximum Discharge Concentration 5.0 Solids Loading Capacity 1 125 lbs/hr Polymer Range 15 25 lbs/dry ton solids Solids Capture Efficiency 98

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  • Sludge Thickening Concentration

    Jan 05 2021  Gravity thickener design is very similar to that of primary settling basins The mechanism of the process is also similar Due to relatively higher solid content in sludge than that in wastewater a heavy duty scraper is often called for in sludge gravity thickening in order to move sludge to a hopper from which it is withdrawn and further

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  • Thickener Case Study with BASF

    This involved the training of a machine learning based digital twin which predicts the thickener performance based on the feed quantities properties and control variable settings Configuration of the Optimizer’s Value Driver This is the setup of Optimizer objectives and constraints which is

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  • PDF

    FSM H06 CS5

    settling velocities could theoretically be used to design settling thickening tanks Although this theory is important in understanding the design of settling thickening tanks the reality is that when designing a settling tank empirical values are determined and used for the design based on the characteristics of the FS in specifi c conditions.

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  • PDF

    Thickening and Dewatering

    solids and 10 000 mg/L 1 solids Facilities with digestion generate solids ranging from 1.5 to 3.5 solids Dewatering typically produces a dewatered cake product of 15 40 solids concentration Figure 3 This product is semi solid and can be handled as a solid Table 1 Common thickeners and operating parameters

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  • PDF

    CHAPTER 3 SLUDGE THICKENING

    The design involves selecting a typical solids flux and calculating the required surface area by dividing the anticipated solids feed by the flux 3 Area of the thickener 2 Design based on Iaboratory data First Approach It is the best technique if the Iaboratory data is available Typical test is done by using a 1000mL graduated cylinder.

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    PWTech Volute Thickener

    The Volute Thickener design is based on the patented dewatering drum design used for the PWTech Volute Dewatering Press sludge dewatering unit The Volute Thickener is a very simple piece of equipment that is virtually maintenance free and fully automated It is designed to take dilute sludges and thicken them allowing for more cost

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  • Thickener sizing and the importance of testwork

    Mar 23 2010  Thickener sizing and the importance of testwork especially for paste International Mining’s monster April issue including the annual paste supplement is now with the printer One article for which there was insufficient space is by Outotec’s Andrew McIntosh He notes that the sizing of equipment which achieves design requirements and

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    Design and Operation of Final Clarifiers

    it directly impacts clarifier SLR.The design MLSS is typically selected based on the solids inventory required to m eet process obj ec tive s Mi xedl 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 above 6 000 mg/L For a given process requ

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  • Gravity Sludge Thickening Tank for sewage treatment

    Working principle The sludge thickening tank is based on gravity and sedimentation which makes solid liquid separate from each other The concentration of pulp waste water could be enhanced from 2 15 to 60 70 by the machine the clear water is overflow from the upper part of the thickener so as to achieve the purpose of sewage purification and solid liquid separation.

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  • The MBR Site

    On the other hand a reduced solids level reduces the process aeration energy demand because the oxygen transfer efficiency is higher which is good So as is so often the case it’s horses for courses the design and operating criteria selected will depend on the prevailing conditions and the specific scenario concerned.

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  • Most common problems in thickener operations part 1

    The most common problems in thickener operations include the presence of suspended solids in the recovered water and the density or percentage of solids of the thickener discharge outside the set targets These problems are classified according to whether they are caused by thickener design errors changes in ore properties or mechanical and

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