Sludge Dewatering and Thickening
A thickener operates pretty much like a settling tank. The feed enters from the middle, are distributed radially, the settled sludge is collected form the underflow, and the effluent exits over the weirs. ... The topmost zone is free of solids and comprises the liquid that eventually escapes over the weirs. The next zone is called the feed zone ...
Most common problems in thickener operations (part 2)
As a rule of thumb, in conventional thickeners, the interface level should be kept between 0.5 to 1.0 m below the surface. On the other hand, the mud level should be kept between 2.0 to 3.0 m over the thickener bottom. Figure 4. Thickener settling layers. An example of a suitable control strategy is presented in figure 5.
High Rate Thickeners
There are two basic types of high rate thickener units: Lamina or tube settlers and solids recirculation units Lamina Thickeners They contain space-cutting baffles that intercept settling paths at many …
(PDF) THICKENER DESIGN, CONTROL AND DEVELOPMENT
combine in the design, contr ol and operation of a modern thick ener. This paper does not seek to. provide all the answers in thi ckener design and control, but …
Industrial Thickener Bentonite | Your Manufacturer
The team has an in-depth knowledge of the powder coating raw materials organoclay additive to help you know which would be best for you. Mob: +86-. Email: jessie@camp-shinning. //. Camp Shinning is an industrial thickener bentonite manufacturer, with great rheopectic and thixotropic.
Thickener
Thickener. The EIMCO-K.C.P. equipment product line consists of Liquid Solid Separation products for the Mining, Mineral & Metallurgical Process, Chemical Process, Food …
Municipal Sludge Thickening Technologies | SpringerLink
At a lower depth of the thickener, a continuous transition takes place from the supernatant zone to the sludge zone where settling of the solids is prevented (DWA-M 381E 2007). Higher solids concentrations are achieved with increasing depth until the compression pressure equals that of the pore water.
THICKENERS
Hence, zone settling places no depth demand on thickener design. The general design of thickeners does not follow strict geometric proportions; the relationship between depth and diameter is important only to the extent that the tank volume will provide sufficient retention time, taking operating efficiency and mechanical design into account.
Chapter 7 Zone Settling and Compression
Between AB and CD is clear water zone free from settleable solids with a conspicuous solid-liquid surface of separation CD marked (1). Springer India 2017 105. A. De, Sedimentation Process and Design of Settling Systems, Springer Transactions in Civil and Environmental Engineering, DOI 10.1007/978-81-322-3634-4_7 Fig. 7.1 Batch settling …
Designing thickeners by matching hindered settling and …
Two distinct residence times (in the hindered settling zone) are also chosen T res = 0.05 (Cases 1–2 and 5–6) and T res = 0.3 (Cases 3–4 and 7–8). Odd and even numbered cases can be. Results. This results section is arranged in three parts. Section 5.1 considers profiles of solids fraction vs position in the hindered settling zone.
A description of the sedimentation process during …
1 Introduction. Eleven years after the development of the continuous thickener by Dorr in 1905, Coe and Clevenger described and classified the sedimentation process under static batch settling conditions into four zones from the top down i.e. a clear water zone; an initial slurry concentration zone; a transition zone and a compression zone (Coe ...
Critical review of thickener design methods
It is precisely by the addition of flocculant that the depth of the clear liquid is controlled in industrial thickeners and, for a safe operation, it is maintained at a minimum of 0.5 to 1.0 m. When zone I is invaded with solid particles we say that the thickener overflows. Beneath the clear liquid, is zone II, called the hindered settling zone.
Comprehensive Guide to Mining Thickeners | Mining Pedia
2. Settling Zone Design. The settling zone is where the separation of solids from the liquid occurs within the thickener. Design considerations for the settling …
PHOENIX AltaFlo Ultra High-Rate Thickener
The PHOENIX AltaFlo™ Ultra High-Rate Thickener uses unique internal geometry, a deep sidewall and steep conical bottom to achieve underflow concentration comparable or better than a traditional raked thickener. The thickener uses internal dilution to help optimize flocculation and a deep free settling zone and conical
Circular Clarifiers and Thickeners
The Monroe Circular Clarifiers and Thickeners are available in self-supporting prefabricated steel units or they can be designed for installation in a concrete tank. Existing structures and systems can sometimes be utilized and upgraded for cost savings. Circular Clarifiers normally utilize a center feed inlet well or a peripheral inlet.
Chapter 3.2 Settling-thickening tanks
area should be doubled so that two parallel-operated settling-thickening tanks can receive discharged faecal sludge. Step 3: Sizing of thickened sludge layer The thickened sludge layer depth will vary with TSS concentration and will govern the design of the settling-thickening tank. 8 ç: Volume of thickened sludge storage zone [m3] 3 æ
Thickener
Thickener. The EIMCO-K.C.P. equipment product line consists of Liquid Solid Separation products for the Mining, Mineral & Metallurgical Process, Chemical Process, Food Process, Refinery, Pulp and Paper, Power …
Measuring Settling Rates and Calculating Thickener Capacity
F, G, and H of Fig. 1 show progressive stages of settling in which zones A and D are growing deeper, zone B is decreasing in depth, and zone C remains constant—a feature of this particular pulp. Fig. 1 (I) shows the condition when all of the pulp has entered zone D and compression of the slime flocs is going on. Fig. 1 (J) shows the final ...
Sludge Thickening
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, and the effluent exits over the weirs. ... The topmost zone is free of solids and comprises the liquid that eventually escapes over the weirs. The next zone is called the feed zone ...
AltaFlo™ Ultra High-Rate Thickener
Internal dilution helps optimize flocculation and a deep free settling zone and conical feed well achieves maximize flocculation. In addition, the AltaFlo™ Thickener uses sedimentation technology to maximize the recovery rate of clean, clarified overflow water that can be recycled and reused in the process. ... For more detailed information ...
Sizing and Operating Thickeners
Thickeners are often operated to keep the interface height constant using a level control device or manual measurements of the sludge level. In this case, if the feed solids rate is increased from 10.0 to 11.1 metric tons/day, the operating point at steady-state will move from point no. 1 to point no. 4. The underflow pumping rate will have to ...
Thickener Optimization Package
dewatering in the hindered settling zone to achieve a very high settling rate. The AltaFlo typically operates at twice the settling rate of a high rate thickener. The geometry of …
Thickener Optimization Package
dewatering in the hindered settling zone to achieve a very high settling rate. The AltaFlo typically operates at twice the settling rate of a high rate thickener. The geometry of the unit provides for a deep compaction bed, allowing the thickener to achieve relatively high densities. The AltaFlo has the following advantages: • Smaller footprint
Ultra-Dense Thickeners from McLanahan
Tanks on these Thickeners are typically taller to provide a free settling zone. They also have a deep compression zone with long mud residence times, allowing sludge to compact under its own weight. ... Deep Cone Thickeners are free-standing, raised units that are available as either welded single piece tanks up to 12' (3.66 m) in diameter or ...
Comprehensive Guide to Mining Thickeners | Mining Pedia
2. Settling Zone Design. The settling zone is where the separation of solids from the liquid occurs within the thickener. Design considerations for the settling zone include the tank diameter, depth, and slope of the tank floor. A larger settling zone with an appropriate floor slope allows for effective settling of solids, resulting in …
Thickening
Unlike conventional thickeners, high rate thickeners must use flocculants. The basic design of a high rate thickener is below. High rate thickener feed wells are designed to disperse flocculants thoroughly into the feed end to admit the flocculated slurry into the settling zone of the thickener without destruction of the newly formed floccules.
McLanahan | Thickeners
McLanahan Thickeners also reduce the amount of material reporting to waste. This allows producers to reduce the size of their settling ponds or tailings storage facilities, which …
Conventional or High Capacity Thickeners
'T eliminates the free settling zone and all or most of rentional thickeners. the effective application of polymers. The secret for above the feed distribution point and maintaining …
Biosolids Technology Fact Sheet
settling, hindered settling, and compaction settling. Gravity settling occurs when solid particles travel downward due to their weight. Settlement continues as solids begin to concentrate near the bottom of the tank, but the settlement rate decreases as the solids concentrations increase. This is known as "hindered settling." Compaction ...
thickener compaction zone manufacturer
For many years thickener drive-heads were the proprietary design of the thickener manufacturer. Smaller diameter thickeners were powered by 'worm-and-wheel' type gear reducers mounted onto the drive shaft . Larger units required multiple stages of reduction to develop the speed and torque required for the process application.