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Our sludge with a maximum solids concentration 4% is introduced into the Sludge cleaner with screenings

compactor SDH to remove all the screenings present in the sludge before the next process (thickening,

digesting and/ or dewatering).

SDH is composed by an external drum perforated 5 mm holes in the first stage and 2 mm holes in the

compaction chamber the screening remain into the internal surface of the drum instead of the liquid sludge

across the perforation and it is discharged for the next process. The screenings are conveyed by a shafted

spiral conveyor and dewatered before the discharge into the compaction chamber with a counterweight

pneumatic actuated. The screenings dryness reaches 45%.

Perforated holes 5 mm drum is supplied with a conical section and divided in two parts for maintenance

purpose. For the same scope the screw conveyor is also supplied with shaft bolted in two parts to have the

possibility to separate the screw for maintenance purpose.

No washing is needed during the process of the SDH Sludge cleaner. No brushes are present to clean the

surface of the drum.


Our SD – SLUDGE SCREW PRESS is designed to dewater the sludge coming from municipal and industrial

process to obtain a result in term of dryness more than 20%.(from 18 to 25%).

The dewatered sludge is pushed by the conveying screw into the discharge chamber, during this phase, the

flocculated sludge loses a certain quantity of water and before the outlet, thanks to the adjustable

counterweight, provides to dewater the sludge to obtain the best performance.

The water comes out from a wedge wire section drum filter present all around the screw.

The filter maintains the maximum of efficiency thanks to the integrated motorized washing system that with

an electric motor of 0,09 Kw provides to wash and consequently to clean the filter for all the external


The range is composed by the Sludge screw press SD– SLUDGE SCREW and SDS – SLUDGE SCREW THICKENER.

To obtain a better performance in term of sludge dewatering, the equipment can be installed in sequence:

SDS sludge screw thickener to process the sludge until 6% dryness and SD sludge screw press to reach a

dryness from 18 to 25%.

The sludge must be always conditioned with polyelectrolyte in order to obtain the correct flocculation before

being processed with SD and/or SDS.

Both equipment SD and SDS work with low energy consumption and low rotation speed.

Consequently, also the wear of the components is very limited.

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