Inclined Screw Press – Industrial

The HUBER Q-PRESS® RoS3Q Inclined Sludge Press is a unique sludge dewatering machine developed by HUBER over 20 years ago and now over 1200 machines have been installed globally in many applications.

The screw press provides a simple, high performance system that offers an attractive life cycle value compared to centrifuges or belt presses.

One of the key features of the screw press is its slow operational speed. The basket and screw rotates at <1.5rpm thus minimising wear and prolonging life and service intervals.

Several RoS3Q models are available with capacities ranging from 20 to 540Kg DS per hour to suit most industrial applications for dewatering of primary or secondary sludge.

All machines are fully enclosed and manufactured in stainless steel.

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How the Screw Press Works
Inclined screw press – trial unit

Operation of screw press is quite a simple exercise.
As with all dewatering systems, the wet slurry needs to be stored in a suitable mixed vessel to ensure that a consistant slurry is delivered to the screw press. The speed of teh transfer pump is set to suit the hydraulic and solids load.

Prior to entry to the screw press, the slurry is flocculated in-line with a polyelectrolyte to enhance the dewatering process

The HUBER Inclined Screw press operation
The machine consists of a main case, internal screw (rotating at <1.5rpm), spray bar and cylindrical wedgewire/mesh drum. As the sludge enters the unit the sludge is conveyed by the screw through the drum length whilst the filtrate is drained through the mesh. The drum consists of variable apertures and profiles, and together with a reducing screw pitch and increased shaft diameter, pressure is gradually applied to the sludge mass.

The ultimate high pressure zone is at the outlet section where an adjustable pneumatic cone is configured to achieve maximum sludge dryness. The cake is discharged through the cone into a bin or conveyor system and the filtrate collects within the main case and is discharged via gravity to the filtrate outlet flange.

Hydroflux Industrial has a fully containerised system available for trials or rental.
The system is fully containerised and fitted with a HUBER RoS3Q Size 440 system and all the required ancillary components and can process up to 140 kg/h of dry solids, or up to 4000 L/h of sludge.

Containerised system inclusions
Sludge Feed Pump
Sludge Feed Flowmeter
Automatic Polymer Dosing System with powdered storage hopper and liquid drum pump
Polymer Dosing Pump
Polymer Flowmeter
RoS3Q440 Inclined Sludge Press
Inline flocculation tube and mixing valve
Control System
Interconnecting pipework
Compressor for operation of retention cone
Interior lighting, GPO, 2 x E-Stops and 2kW Heater
Penetrations for access to tie in points
Cable with 20A plug
O+M Manuals (2 copies)
1 x storage compartment (approx. 1L x 2.5W x 1H)

The installation place must meet the following requirements:
A lowerable container truck with twistlocks for ISO containers is ideal for transportation. The container must be lifted at the four upper corner fittings only.
Plain, paved area
Sufficient space for access, installation, safe operation of the plant and regular removal of compacted sludge.
As short as possible distance to the thin sludge intermediate storage unit.
Gravity discharge of filtrate
Power supply
Fresh water supply
Sufficient exterior lighting

Dimensions and weight
Length: 6100mm
Width: 2500mm
Height: 2800mm
Weight: 7000 kg

Control system
The panel contains a 6” HMI whereby full control is provided for the entire dewatering system, including the polymer plant.

Service requirements
Power Supply: 415V/50 Hz – 20 AMP
Washwater requirement: At least 2.6 L/s at 5 bar (Please note that this is an instantaneous demand. The hourly consumption is approx. 800L. )

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