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SCRUDRAIN thickeners with Archimedean screw manufactured by TEKNOFANGHI are the modern and economical solution for sludge thickening.
Sludge thickeners are widely used in many wastewater and water treatment plants. Sludge thickeners are also used to increase the sludge concentration for biogas reactors, thus enabling the use of smaller biogas reactors. They are generally placed before filter presses, belt press and centrifuges to achieve higher sludge concentration before final dewatering. Other applications are to reduce the volume of sludge before being pumped into drying beds or being used in agriculture. This equipment can also be used to remove coarse material such as fibres in the textile industry.

Zagęszczacze - Scrudrain

In keeping with our well know high standards, all sludge treatment equipment is made of AISI 304 stainless steel.
SCRUDRAIN thickeners are made according to CE European standard.

Zagęszczacze - Scrudrain - nagroda  Zagęszczacze - Scrudrain - nagroda


The drum filter is rotated by an adjustable gear motor. This design enables an easy and simple control of the dewatering process by adjusting the rotating speed to achieve the optimal dewatering time and preventing short-circuiting.
The achievable dewatering results are much higher than with conventional systems. The filter cloth is kept clean by making use of washing water at high pressure from outside the drum. Filtrate can be used. The filter cloth has a long life, since it is not under tensile stress.
SCRUDRAIN® thickeners are supplied completly with control panel, washing pump and all ancilliary equipment necessary for efficient operation. The SCRUDRAIN® thickeners are supplied as complete assembled and tested units in order to minimise installation time and costs. The SCRUDRAIN® sludge thickeners can handle

Zagęszczacz mechaniczny bębnowy - Scrudrain

from a few m3/h to a maximum of 60 m3/h, depending on the type of sludge and the dry solid content. Changing the speed of the Archimedean screw allows adjustment of the concentration of the thickened sludge and minimises the use of polyelectrolyte according to requirements.
As a general guide, sludge with 0,5 - 3 % can be thickened to 5 - 15 % D.S.


Comparison between SCRUDRAIN® and belt thickeners:


Filtering cloth is fixed directly on the Archimedean screw, therefore it is not stressed to traction as it happens with the thickening tables so that the life is about four times longer.


Vertical flocculator is not required, a static mixer is sufficient, thus saving on energy and maintenance.


Sludge is continuously re-mixed allowing drainage of the free water (water surrounds sludge flocks but is not in contact with them) and also the interstice water (water present between sludge flocks). Interstice water is not removable with thickening tables, therefore the D.S. concentration attainable with Archimedean screw thickeners is highly superior.

Zagęszczacz ze ¶rub± Archimedesa - Scrudrain


Lower use of polyelectrolyte with same percentage of outlet D.S. This reduction is obtained with better yield of the thickener (as described above).


The sludge removed by the washing action remains inside the drum, while the thickening tables discharge it with the filtrate outlet, with the result that the filtrate is less clear.
Compressed air is not necessary (therefore no air compressor), and there are no problems related to the belt going out.


Smaller dimensions. The structure is studied to be transported totally assembled. The machine is completely closed to prevent accidents, to avoid liquids going out and to contain bad smalls.


SCRUDRAIN already includes washing pump and electric control panel. With the control panel the machine is completely automatic. It is studied to be interfaced with other panels and to drive sludge and polyelectrolyte pumps.


ARCHIMEDEAN SCREW1xØ400 mm1xØ600 mm2xØ400 mm2xØ400 mm
FLOW MAX [m3/h]10-2015-3020-4030-60
THICKENER DRIVE [kW]0.350.750.701,50
WEIGHT [kg]350450550800

Max flow depends on the type of sludge and concentration of D.S.

Zagęszczacz mechaniczny bębnowy
    Process diagram:
  1. Washing pump
  2. Polyelectrolyte unit (optional)
  3. Polyelectrolyte pump (optional)
  4. Sludge pump
  5. Static mixer
  6. Washing water interception valve
  7. Thickened sludge pump
  8. Washing water
  9. Clean water
  10. Filtrate to the head of the treatment plant
  11. Sludge.


Zagęszczacz ze ¶rub± Archimedesa - Scrudrain

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AD 04D164014072001956270716131760
AD 06C124010402002032283515921820
AD 06D205018202002032283515921820
Dimensions are indicative only and subject to change without notice.
All dimensions are in mm.

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Sludge dewatering equipment Draimad | Belt filter press Monobelt | Sludge thickener Scrudrain | Polyelectrolyte preparation and dosing systems CMP CAP |