Screw Decanter(Thickener)

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Application – Screw Decanter (Thickener)

A high efficient device which uses high centrifugal force in separating solid-liquid separation and other various sewages

  • Thickens remaining sludge and raw sludge of the sewage, wastewater treatment plant
  • Thickens digestde sludge of sewage treatment plant
  • Thickens sludge of excreta and livestock wastewater treatment plant
Specification – Screw Decanter (Thickener) 
Standard Capacity (㎥/hr) G-force Motor (Kw) Size (L×W×H mm) Weight (kg)
EWHA 250MTTI 2~5 2,000~2,500G 7.5/(1.5) 2,200×750×800 2,000
EWHA 300MTTI 5~8 2,000~2,500G 15/(2.2) 2,500×870×830 2,500
EWHA 350MTTI 8~15 2,000~2,500G 18.5/(3.7) 2,800×1,000×950 3,200
EWHA 400MTTI 15~20 2,000~2,500G 30/(7.3) 3,300×1,150×1,100 4,000
EWHA 450MTTI 20~25 2,000~2,500G 45/(11) 3,500×1,250×1,180 5,000
EWHA 500MTTI 25~30 2,000~2,500G 55/(15) 3,850×1,400×1,420 5,500
EWHA 550MTTI 30~40 2,000~2,500G 55/(15) 4,500×1,420×1,420 6,500
EWHA 620MTTI 40~50 2,000~2,500G 75/(22) 4,900×1,720×1,600 7,500
EWHA 650MTTI 45~55 2,000~2,500G 75/(22) 5,050×1,800×1,650 8,500
EWHA 720MTTI 55~70 2,000~2,500G 90/(22) 5,400×1,900×1,700 9,500

*Processing capacity may vary according to inflow concentration

Delivery Performance – Screw Decanter (Thickener)
N O . Installation Area Capacity (㎥/hr) Quantity
1 Incheon Environmental Corporation 47 5
2 Wonju public sewage treatment plant expansion project 25 4
3 Yangsan water purification park 60 2
4 Busan Noksan sewage treatment plant 60 2
5 Anyang City sewage treatment plant (Bang Dal) 50 2
6 Pocheon public sewage treatmentfacility construction 20 2
7 Kyuam public sewage treatment facility construction 3~5 2
8 Busan South Sewage Treatment Plant 70 1
9 Busan South Public sewage treatment facility 60 1


*Sales over 30 sites including mentioned installation areas

Patents lists – Screw Decanter (Thickener)
Classification Contents No. Application date egostration date
patent Decanter type centrifuge- (Coagulation,Concentration and Dehydration) 10-0740608 2007-03-02 2007-07-11
patent Channel type mixed coagulation divice having a clogging prevention funtion 10-0949462 2008-03-19 2010-03-18
Utility Model Multi-Bush for centrifugal separator with external exchangeable variable diameter and discharge port 20-0445181 2008-03-19 2009-06-30
patent Internal reduction gear box type screw decanter 10-0974949 2010-04-20 2010-08-03
patent Sludge treatment equipment 10-0993173 2010-08-18 2010-11-03
patent Channel sludge mixed flocculation equipment 10-0999357 2010-09-06 2010-12-02
patent Corrosive gas backflow prevention device of centrifugal dehydrator 10-1008516 2010-11-02 2011-01-10
patent Centrifugal dehydrator with distribution chamber of clog prevention structure 10-1231066 2012-07-18 2013-02-01
patent Bearing with anti-seize function 10-1256854 2012-11-12 2013-04-16
patent Centrifugal separator with variable bushing 10-1321078 2013-07-19 2013-10-16
patent Centrifugal separator with discharge venting 10-1433308 2014-03-12 2014-08-13
patent Centrifugal separator with discharge venting 10-1422567 2014-03-12 2014-07-17
patent Rapid liquid polymer melting device 10-1209520 2012-07-18 2012-12-03
Feature-Decanter Type Centrifuge(Dehydrator, Thickener, Separator)


Horizontal Structure


The horizontal structure screw decanter is a new concept screw decanter newly developed in 2016. It arranges main driving motor and speed motor in horizontally intensive structure to minimize the occurrence of noise and vibration.


Strength of Horizontal Structure

*Lowers the center of load of the device by arranging main drive motor and back drive motor in horizontally intensive structure. It enables stable operation and also improves operation environment with less noise and vibration.
*Enhanced stability and durability through low frame height and improved solidity.
*Enhanced cake dehydration efficiency through extended torque value regulating range for scroll through tension dispersion of the driving part.
*Enhanced lifespan through minimized bending load between axes with left and right placement of reduction gear and pulley part.


Internal reduction gear box type


Internal reduction gear box type

Internal reduction gear box type decanter is a high-tech screw decanter developed in 2010. The external gear box, source of vibration in the existing screw decanter, is directly attached to the bowl and it prevents the vibration occurrence. It also prevents the malfunctioning in advance and has compact size.

*Development of internal gear box type decanter, vibration of cantilever structured external reduction gear.

*Weight lightening and improved durability of reduction gear through development of reduction gear for screw decanter.

*Enhanced dehydration performance through stable high-speed operation by the improved structural vibration.

Difference from the Existing Screw Decanter and Strength

*No reduction gear influencing the external vibration of the supporting bearing.
*Reduction gear is built in the bowl and it allows for the precise correction of dynamic balance and minimizes vibration during the high-speed rotation.
*Minimized vibration allows for increased speed of screw scanter and improves the performance of the decanter.
*The solution for vibration increase source drastically extends the device lifespan.
*Compact device with built-in reduction gear.


External Exchanging Multiple Bush


Extended lifespan and improved performance by changing the cake discharge caliber and exchanging the bush on site according to sludge characteristic
*Discharge caliber is changed by exchanging liner and bush within the same bush husing

Importance of Solid’s Discharge Bush
*Among the screw decanter parts, discharge bush has the most wear
*Uneven wear of discharge bush causes vibration of high-speed bowl and causes malfunctioning
*Constant operation in the excessive vibration state caused by the unavailable on-site bush exchange leads to increased number of malfunctioning and accidents.


Double cover cake outlet of Screw Decanter (Patented)



Dividable cover of Screw Decanter



Improved in abrasion resistance of the screw(Preliminary tiling, usage of tungsten powder)