sludge dewatering

Morselt Dehydrator
Morselt Dehydrator

The Morselt dehydrator sludge dewatering installation is an unique product, and offers a lot of advantages against other sludge treatment methods. The dehydrator sludge dewatering system is worldwide patented. The key of the process is the dewatering drum consist of a screw rotating with a constant speed inside layers of fixed rings, moving rings and spacers, which dewatering and thickening the sludge in one treatment. The installation can treat sludge as aqueous solution of 0,1% DS directly from a biological process like for example an aeration tank. And produces a cake to approx. 25% DS. With this process will be separate thickening, store and process conditions are not necessary. The installation works fully automatic without operators, has a low sound level and low energy usage.

Morselt Dehydrator

The Unique design:

Spacer rings and fixed rings being maintained in place by four axles. Moving rings whose diameter is smaller than the outer diameter of the screw and are slightly thinner than the spacer rings are moved by the screw. The inlet portion is the thickening zone, where the filtrate is removed. The speed of the screw and the space between the spacer rings become smaller in the direction of the end plate in which the solid particles are discharged and are more or less determines the dry matter content. The dehydrator can treat flocked sludge as well as directly treating sludge that remains to be flocked.

Morselt Dehydrator


The sludge is automatically fed with a constant flow from your sludge receiving tank. From here it is added in the flocculation tank from dehydrator. if it is necessary there will be added flocculant. From here the flocced sludge flows over an overflow edge in to the dewatering drum in which it is being compressed. The dehydrator may automatically control the entire process including the power supply of the sludge and the preparation and dosage of polymer.

Morselt Dehydrator

Operations and maintenance:

The dehydrator requires little supervision from maintenance of an operator outside the periodic maintenance and any of the polymer filling. Depending on the operating conditions the rings need to be changed after 1 or 2 years. This maintenance takes only a hour so the process can be restarted fast.

Morselt Dehydrator
Filter Presses
Filter Presses

The Morselt filter presses are suitable for removing solids from the waste water. These filter presses comprise a number of filter plates which are surrounded by the desired filter cloths. These plates are under pressure so that the water can be pressed out of the plates and the pole gets stuck between the filter plates.

The filter presses are available in different sizes and different options. The Morselt filter presses are available from manual control to automatic opening and closing systems with automatic plate separation.


The formerly patented and proven slurry feed system can enable substantially smaller diameters than conventional systems.

The high rate clarifier for solid / liquid separation efficiently and effectively utilises the pre-treatment of sludge with flocculants. With a defined horizontal velocity, the pre-treated slurry is fed into an active sludge bed. The sludge bed acts as a filter layer and retains suspended solids. This procedure ensures extraordinarily good clarification, meaning that only a very small quantity of solids reach the overflow. Since the particles to be separated are added near the underflow discharge in the clarifier, only a short sedimentation distance is required. The solids thicken faster and a higher thickening factor in the underflow is achieved.



  • Quick separation, therefore considerably higher specific capacity
  • The high specific capacity enables smaller clarifier diameter. This advantage is of particular importance in indoor applications
  • Very clear overflow at high specific capacity
  • Diameter of 0.5 to 30 m
  • Lifting device optional, if necessary
  • Flocculent dosing station, pumps etc. can be included in the offer
  • Steel, steel/ rubber lined, plastic (PP / FRP) models

General applications:

  • Chemical industry
  • Environmental e.g. after scrubbers for air purification
  • FGD systems
  • Metallurgical industry
  • Soil, sand, gypsum, lime treatment