## Theory and Application of Thickener Design

process of continuous sedimentation. It is employed mainly in design calculations to determine the required thickener area, the most important design parameter, and ultimately the maximum steady state underflow concentration that is possible for a given solids throughput. In

## THICKENER DESIGN - particles.org.uk

THICKENER DESIGN A continuous thickener is to be designed to deal with the effluent from the last question. It will treat 1000 m3 per day of suspension fed at 3% v/v solids concentration and is to discharge underflow at 13.8% v/v solids. Use the settling curve and the following relation:

## A Critical Review of Thickener Design Methods t

2. Macroscopic mass balance in a continuous thickener at steady state: Classical me thods of thickener design. Control variables QD Cite F3(x) h Zc Perturbation Intermediate variables Fig. 3 Variables in a continuous thickener. KONA No.ll (1993) 2.1 Mishler's method. The first equation to predict the capacity of a

## About this site

Continuous thickener design A continuous thickener is used to treat a 1000 m² suspension per day of 3% v/v solid concentration. The underflow is discharged at 13.8% v/v solid concentration. The batch settling data is shown in the table below. Plot the data on a graph paper.

## About this site

Most thickener design is based on a combination of batch and continuous bench-top testing. The f irst step is typically the small scale “j ar test”, where a slurry is allowed to settle over ...

## The Design of Continuous Thickeners for Flocculated Materials

The authors review the literature and discuss the application of methods to the design of thickeners for ilocculated metallurgical pulps. The use and evaluation of flocculents is described. Experimental data show that design based upon laboratory settlingdata is acceptable. The economic aspect of design is also discussed.INTRODUCTIONFor many years there has been little change in the methods ...

## A Critical Review of Thickener Design Methods t

2. Macroscopic mass balance in a continuous thickener at steady state: Classical me thods of thickener design. Control variables QD Cite F3(x) h Zc Perturbation Intermediate variables Fig. 3 Variables in a continuous thickener. KONA No.ll (1993) 2.1 Mishler's method. The first equation to predict the capacity of a

## Simulation of batch and continuous thickeners - ScienceDirect

Jan 01, 1993 · DESIGN OF CONTINUOUS THICKENERS Consider a suspension with an initial volume frac- tion of solids ~ In Fig. 1(a) and (b), a possible location and variation of the discontinuity heights in batch testing and in continuous thickeners can be observed. The significance of some variables can be 2039 2040 R. Fot rr and F. Ruiz Fig. 1.

## Software for the design and simulation of gravity thickeners

Example of the design of a continuous thickener. Consider the design of an industrial thickener for a. feed rate of 178 tons per hour, with an underﬂow con-

## CHAPTER 12 Sludge Processing and Disposal

Thickener design should provide adequate capacity to meet peak demands. 12.3.1.2 Septicity Thickener design should provide means to prevent septicity during the thickening process. Odor consideration should be considered. 12.3.1.3 Continuous Return Thickeners should be provided with a means of continuous return of

## APPLICATION OF A SLUDGE GRAVITY THICKENING MODEL

design of thickeners as well as design for the thickening function of clarifiers can now be conducted on a wholly rational basis. The model ... For a continuous thickener, operated at steady state, Equations 1 and 2 may be integrated to yield, respectively, Equations 3 and 4. p v = constant = G (3)

## Conventional Thickeners - Solid Liquid Separation

Likewise, thickeners are often used for storage to facilitate the continuous feeding of downstream filters or centrifuges. Historically thickeners were introduced to the mining industry in 1905 when the beneficiation of ores by froth flotation was invented in Australia.

## Improve Clarifier and Thickener Design and Operation

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 circles. 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.

## CHAPTER 3 SLUDGE THICKENING - Marmara

Design of Thickeners The thickening process takes place in a settling tank with long-enough solids retention time. For example in secondary clarifiers of activated sludge systems both clarification and thickening operations are carried out. ... Due to the continuous removal of

## Calculation of the compression zone height in continuous ...

A method to calculate the compression zone height in continuous thickeners is presented. With this method, it is necessary to know the variations of the pulp-supernatant interface and the sediment height vs. time in a batch test. This method is discussed considering the following aspects: relationship between the settling rate of solids and ...

## THICKENERS

THICKENERS. A thickener is an equipment structure used for the continuous gravity settling (sedimentation) of solids in suspensions. Suspension is fed into one or more basins or chambers and, whilst it is passing through, the solids settle out. The thickened solids are removed together with a portion of the liquid as thickened "underflow".

## (PDF) Critical review of thickener design methods ...

A Critical Review of Thickener Design Methods t F. Concha and A. Barrientos Department of Metallurgical Engineering University of Concepcion* Abstract In this work we analyze, in the light of their physical foundation, the different methods of thickener design that have been proposed in the literature. ... I 3.3 Design of continuous thickeners ...

## A description of the sedimentation process during dynamic ...

3 Sedimentation under continuous feed dynamic conditions Two thickener operational modes can be defined to describe the sedimentation process under continuous feed dynamic conditions: 3.1 Dynamic batch mode This operating mode typifies a thickener during start-up and assumes the following: The thickener is initially filled with water.

## Design of A Thickener | Civil Engineering | Mechanics

A. Design of a Thickener With the use of the batch sedimentation data collected from the column with slurry of concentration 100g/L CaCO3, the continuous thickener parameters calculated were as follows: Table 5. Continuous Thickener Design Parameters

## A Critical Review of Thickener Design Methods t

2. Macroscopic mass balance in a continuous thickener at steady state: Classical me thods of thickener design. Control variables QD Cite F3(x) h Zc Perturbation Intermediate variables Fig. 3 Variables in a continuous thickener. KONA No.ll (1993) 2.1 Mishler's method. The first equation to predict the capacity of a

## Dynamics of Continuous Thickening

opment of methods for the design of sedimen tation basins.2-4 Even though several investi gators have dealt with the dynamics of continuous-flow systems through modeling, ... model is to simulate the continuous thickening of various types of suspensions, it is necessary to quantify the transport of liquid throughout the thickener. Behn and ...

## Solved 1. To design a continuous flow thickener (underflow ...

To design a continuous flow thickener (underflow velocity of 10 m/d), you first perform a column test with the sludge to measure the gravity flux (shown below in table and plot Total a. For an underflow velocity of 10 m/d calculate the underflow flux at each solids concentration shown in the table (fill in that column in the table).

## Improve Clarifier and Thickener Design and Operation

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 circles. 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.

## Thickener design methods pdf - BitBin

Nov 30, 2017 · The phenomenological theory of continuous thickening of flocculated suspensions in an ideal cylindrical thickener is .. provides a method for thickener design. for design and operation of steady state continuous thickeners.

## continuous types of thickener - aquaticawarszawa.pl

continuous thickeners design continuous types of thickener MTM Crusher. continuous types of thickener. ... Continuous thickeners may be large; ... design of ball mill and process of ball mill; Get Price; continuous thickeners in mineral processing – continuous thickeners in mineral processing. Posted at: November 4, ...

## [PDF] DESIGN OF ' THICKENER CIRCUITS | Semantic Scholar

DESIGN OF ' THICKENER CIRCUITS. @inproceedings {Keane2007DESIGNO, title= {DESIGN OF ' THICKENER CIRCUITS}, author= {J. Keane}, year= {2007} } J. Keane. Published 2007. Introduction Feed dilution or solids-liquid weight The English word "sedimentation" ratio is derived from the Latin verb "sedere" Size and shape of the particulate meaning to ...

## thickeners & clarifiers - MIP Process Corp

available. Thickener tanks, rakes and feedwell’s are custom designed, based on the feed conditions and raking capacity. A retrofit service is offered to enhance performance of existing thickeners and clarifiers. tHiCkener design MIP Thickeners and Clarifiers are designed to operate continuously for 24 hours per day. Process selections are ...

## GRAVITY THICKENING OF ACTIVATED SLUDGE

4. Laboratory Continuous Thickener - Schematic Diagram 20 5. Laboratory Continuous Thickener 21 6. Statham Low Pressure Accessory with Readout 22 7. Separation Cells 23 8. Sigamotor Pumps 24.9. Height of Solid-Liquid Interface as a Function of Time 28 10. Zone Settling Velocity as a Function of Suspended Solids Concentration 30 11.

## Thickeners | McLanahan

Thickeners. Thickeners — or Clarifiers, depending on the application — can be used to recover immediately reusable process water, as well as extract fines and other materials. Thickeners are used by mineral and aggregate producers, as well as by environmental contractors in industries such as wastewater management, to separate solids from liquid in a slurry.

## Most common problems in thickener operations (part 1)

Thickeners are continuous sedimentation equipment used to perform solid-liquid separation in finely ground slurry ore as mineral concentrates or tailings (figure 1). Figure 1. Conventional thickener. ... Thickener design errors; In thickener design, there are two specifications that will define the tank efficiency to process minerals: thickener ...

## Thickeners - Solid Liquid Separation

The high time for thickeners was in the 60's when the metallurgical industries were booming and sizes of up to 150 m diameter were constructed. Such jumbo thickeners, when centrally driven, require for most demanding applications extra heavy duty drive heads some of which reach a continuous operating torque of 3.300.000 Nm.

## 膏体浓密机扭矩计算模型及其影响因素 - USTB

Frost R C, Halliday J, Dee A S. Continuous consolidation of sludge in large scale gravity thickeners. Water Sci Technol, 1993, 28(1):77 [6] Warden J H. The design of rakes for continuous thickeners especially for waterworks coagulant sludges. Filtr Sep, 1981:113 [7] Albertson O E, Okey R W. Evaluating scraper designs. Water Environ Technol ...

## Theoretical Concept of Gravity Sludge Thickening; Scaling ...

thickened in a continuous thickener. His observations indicate that a ratio of D values, i.e., Dt/Db, where Dt and Dh represent results from continuous thickening and batch thickening, re 1000 STEP 3 0.1 10 ML CLB/SQ FT/DAY) STEP 4 lOOr 100 0.0 0.2 CLB /CU FT) FIGURE 5.?Continuous thickener design procedure.