gravity sludge thickener design

DOCUMENT' RESUME SE 041 599 AUTHOR Klopping, Paul H

eration in thickening secondary sludge 10 Explain why filamentous bacteria in secondaey sludge causes thickening problems 11 Recall that an increase in temperature causes an increase in biological activity 12 Recall that gravity thickener operation varies between summer and winter due to the effect of temperature on gasification 13

Gravity Belt Thickener Komline Sanderson

Gravity belt thickener model selection is a function of hydraulic feed rate the Model G 25 thickening system is generally appropriate for 0 5 to 1 0 waste activated sludge feed rates up to 125 GPM 7 9 liters/sec or 28 M3/h and the GSC and GSCE series machines are appropriate for higher feed rates

TECHNOLOGY FACT SHEETS FOR EFFLUENT TREATMENT

The gravity thickening design is similar to a clarifier Thickeners are usually circular shaped the feed is carried out through a pipe to a central hood serving as distribution and still area, with a height that has no effect on compaction or compression bottom area

Alfa Laval AS H Belt Thickener

The Alfa Laval AS H Belt Thickener is a gravity belt thickener used to thicken dilute sludge and slurries particularly those from biological and activated sludge processes It is suitable for all municipal sludge types and all industrial sludge that flocculates Benefits No spill design Minimum operator input Low power consumption

PDF THICKENER DESIGN, CONTROL AND DEVELOPMENT

Given recent developments in thickener design and modelling, this should not be the case e g Sludge Judge to a utomated bed profiling e g for which gravity thickening provides a

CHAPTER 3 SLUDGE THICKENING Marmara Üniversitesi

The thickener design based on the solids flux data obtained in the Iaboratory involves the selection of the solids flux that will limit the operation of the thickener in other words, the maximum solids loading

Sludge Thickening Concentration Wastewater Treatment

May 25, 2020 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duty scraper is often called for in sludge gravity thickening in order to move sludge to a hopper from which it is withdrawn and further

Clarification Segmented, Spiral Blade, Header, Suction

Gravity Sludge Thickener Bridge Mounted DESCRIPTION: Thickeners are used in water and wastewater applications to take solids from other liquid solids separation processes and thicken the solids prior to further dewatering and/or digestion The drive is mounted on the walkway or bridge

Trevi Environmental Solutions Gravity thickener

An example of a gravity based sludge thickener is the Dortmund Tank This type of sludge thickener, very similar to a clarifier, may be applied either continuously or in batch The water that flows over the overflow edge of the sludge thickener is returned to the purification process while the thickened sludge can be pumped to a dewatering

9VAC25 790 600 Sludge Thickening

The side water depth of conventional gravity thickeners shall be a minimum of 10 feet Circular thickeners shall have a minimum bottom slope of 1 1/2 inches per radial foot 2 A gravity sludge thickener shall be so designed as to provide for sludge storage, if sufficient storage is unavailable within other external tankage

What is the Sludge Thickening Process in Water Treatment

Mar 06, 2018 Gravity thickening involves using specially designed circular tanks that concentrate thin sludges to a more dense sludge product The limitation of this form of clarification water treatment is that it works mostly for the excess watery sludge derived from an activated sludge process Thickening tanks have slow moving vertical paddles

Sludge thickening and stabilization processes

Oct 09, 2017 Tank similar in design to a conventional sedimentation tank Normally a circular tank is used Gravity thickening is most effective on primary sludge Gravity thickeners are designed on the basis of solids loading and thickener overflow rate Recommended maximum hydraulic overflow rates range from 15 5 to 31 m3/ m2d 12

Gravity thickeners InnovoMax

Gravity thickeners also provide some solids stabilization and storage, which may be beneficial to downstream operations Smooth up flow Xinhai design provides uniform distribution of slurry across the entire width of the belt A large filtration area provides high efficiency thickening and cost effective chemical utilization

package unit Lamella Gravity Settler Parkson

The Lamella Gravity Settler LGS design is a self contained, packaged settling unit with a conical sludge hopper The Lamella Gravity Settler / Thickener LGST design is a high rate gravity settler combined with a circular, picket fence sludge thickener/scraper The settler section utilizes

How to Size a Thickener Mineral Processing Metallurgy

Knowing how to size a thickener and determine the capacity required to handle a pre determined tonnage of a certain pulp, by overflowing a clear solution and obtaining the desired pulp density of thickener discharge, depends upon the settling rate of that particular pulp The settling rate of any pulp is easily determined by simple laboratory tests such as outlined below: Laboratory Test

Sludge Thickening an overview ScienceDirect Topics

A design developed in the UK by the WRc Warden, 1983, for waterworks sludge thickening applications, consists of a cylindrical tank of water depth 23 5 m with a shallow sloping floor 1 in 20 Sludge is introduced at a central feed well and the supernatant overflows a peripheral Xinhai

CHAPTER 6: DESIGN AND CONSTRUCTION OF SLUDGE

6 2 1 Sludge Piping Sludge piping can be by gravity or by pumping For example, when primary sludge is drawn from clarifiers, it is sometimes by gravity and sometimes by direct suction using pumps The friction loss in gravity pipelines and pumped pipelines are calculated as follows 6 2 1 1 Friction losses in Gravity Sludge Pipelines 1

Lamella Thickeners Metallurgist Mineral Processing

The Lamella Gravity Settler, sometimes designated Lamella Thickener, is a shallow depth sedimentation device which has been applied in a variety of industrial process and wastewater control projects in place of the conventional raked thickeners Theory and Design The Lamella Thickener is an inclined, shallow depth sedimentation device

Northeast Water Pollution Control Plant New Gravity

The Gravity Thickener Facilities were designed to mitigate odor emissions from the existing Set 2 Primary Sedimentation Tanks PSTs The design included replacement of all existing primary sludge pumps to continually pump settled solids out of the existing PSTs into four 80 foot diameter gravity thickeners Design elements include thickened sludge pumps, a thickened sludge wet well, and a

Introduction to Sludge Handling, Treatment and Disposal

for activated sludge Activated sludge can also be concentrated by resettling in primary settling tanks 3 1 GRAVITY THICKENERS A gravity thickener will be designed on the basis of hydraulic surface loading and solids loading The design principles are to be the same as those for sedimentation tanks Bulky sludges with a high Sludge Volume

GRAVITY THICKENING OF ACTIVATED SLUDGE

One process that concentrates or thickens sludge is known as gravity thickening Gravity thickening of sludge is defined as a process by which particles, or aggregates of particles of dilute sludge, due to their greater specific gravity, settle through water and concentrate

Picket Fence Thickener Gravity Thickener Hydria Water

Picket Fence Thickener Gravity Thickener Units have a design life in excess of 20 years The strong, rigid and torsion resistant design ­complies with or exceeds latest design standards and can ­handle high sludge loads Below water AISI304 stainless steel is typically used with an option of AISI316 also available Motor, ­gearboxes

Introduction to Sludge Handling, Treatment and Disposal

A gravity thickener will be designed on the basis of hydraulic surface loading and solids loading The design principles are to be the same as those for sedimentation tanks Bulky sludges with a high Sludge Volume Index SVI require lower loading rates The use of chemical additives lime or polyelectrolytes also allows higher loading rates

High efficiency gravity thickener tank design LZZG

Gravity thickener utilizes the relative density difference between solid particles and water in the sludge to achieve sludge thickener The sludge from the primary sedimentation tank can be directly concentrated into the concentration tank for concentration The water content can generally be concentrated from 95 to 97 to 90 to 92

Sludge Thickening Concentration Wastewater Treatment

May 25, 2020 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

Trevi Environmental Solutions Gravity thickener

An example of a gravity based sludge thickener is the Dortmund Tank This type of sludge thickener, very similar to a clarifier, may be applied either continuously or in batch The water that flows over the overflow edge of the sludge thickener is returned to the purification process while the thickened sludge can be pumped to a dewatering

Gravity Sludge Thickeners Kusters Water

Gravity thickeners are designed for most applications involving sludge thickening Solids are thickened by gravity, then collected at the bottom of the basin and raked to a collection sump for removal The clarified effluent exits over the Xinhai plates and out of the basin Kusters Water Thickeners are offered in sizes ranging from 5 to 150

Biosolids Technology Fact Sheet Gravity Thickening

Therefore, the tank design must ensure a smooth, continuous flow of liquid at the center well, the Xinhais, and the solids removal point Gravity thickener designs usually include circular tanks, 3 4 m 10 13 ft deep and up to 25 m 82 ft in diameter The dimensions are based on prediction of settling due to gravity

Process Design Manual Sludge Treatment And Disposal

4 2 2 Theory of Gravity Thickening and Design Procedures Mancini , and later Dick and Ewing, Dick and Young , Dick , and Edde, Eckenfelder, and Wesley called attention to the inadequacy of the Coe and Clevenger , Kynch , and Talmage and Fitch procedures when significant amounts of activated sludge are involved

FACT SHEET WEF Home

most common mechanical thickening devices and their relative operational parameters See note at end of fact sheet Parameter Drum Thickener Gravity Belt Thickener Thickening Centrifuge Capacity achieve a volume reduction and to produce a 100 400 gpm 200 900 gpm 30 1,500 gpm Washwater Requirement 25 60 gpm 20 60 gpm N/A required for clean in

Picket Fence Thickener Gravity Thickener Hydria Water

Picket Fence Thickener Gravity Thickener Units have a design life in excess of 20 years The strong, rigid and torsion resistant design ­complies with or exceeds latest design standards and can ­handle high sludge loads Below water AISI304 stainless steel is typically used with an option of AISI316 also available Motor, ­gearboxes

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

High efficiency gravity thickener tank design LZZG

Gravity thickener utilizes the relative density difference between solid particles and water in the sludge to achieve sludge thickener The sludge from the primary sedimentation tank can be directly concentrated into the concentration tank for concentration The water content can generally be concentrated from 95 to 97 to 90 to 92

Sludge Thickener Centrisys Equipment THK Series

The Most Efficient Solution to Thicken Sludge The Centrisys Sludge Thickener THK Series is specifically engineered to achieve high performance thickening of biosolids The non conical design results in greater G volume, allowing for the highest capacity of flow to the centrifuge

Sludge Thickening an overview ScienceDirect Topics

The primary objective of sludge thickening is to concentrate the solids, thus reducing the volume of sludge Thickeners may increase the solids concentration by a factor of 25 and produce a clarified liquid effluent Thickening is accomplished by either gravity or dissolved air flotation A gravity thickener is shown in Figure 10 The

PowerDrain belt thickener PD

After the sludge has been flocculated in the feed pipe, it enters the gravity zone where most of the liquids and solids are separated A spreader plate ensures uniform distribution over the working width of the belt PowerDrain belt thickener units can be equipped with two to four rows of ploughs, which compact, rearrange, and deflect the sludge

FACT SHEET WEF Home

most common mechanical thickening devices and their relative operational parameters See note at end of fact sheet Parameter Drum Thickener Gravity Belt Thickener Thickening Centrifuge Capacity achieve a volume reduction and to produce a 100 400 gpm 200 900 gpm 30 1,500 gpm Washwater Requirement 25 60 gpm 20 60 gpm N/A required for clean in

High efficiency gravity thickener tank design LZZG

Gravity thickener utilizes the relative density difference between solid particles and water in the sludge to achieve sludge thickener The sludge from the primary sedimentation tank can be directly concentrated into the concentration tank for concentration The water content can generally be concentrated from 95 to 97 to 90 to 92