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HUBER Screenings Wash Press WAP® SL HP Washout of organics and controlled high-pressure dewatering

Reduced disposal costs with high pressure for maximum washing and dewatering results

  • Dewatering performance up to 60 % DR due to hydraulic high-pressure unit
  • High washout factor
  • Increase of the thermal value of screenings

Especially wear resistant and solid materials in the conical high-pressure unit ensure reliable long-term operation of the plant.

The ROTAMAT® Screenings Wash Press SL HP operates in a batch mode. Screenings either drop into the launder tank directly from a screen or conveyor, or they are flushed into the tank through a launder channel.

After a batch of screenings has been fed, the tank is filled up with wash water and agitated for an adjustable period by means of an impeller.

HUBER Screenings Wash Press WAP® SL HP
HUBER Screenings Wash Press WAP® SL HP
Two Screenings Wash Presses WAP® SL HP 6 in parallel arrangement
Two Screenings Wash Presses WAP® SL HP 6 in parallel arrangement
Three HUBER Perforated Plate Screens EscaMax® feed two HUBER Wash Presses WAP SL HP with a launder channel.
Three HUBER Perforated Plate Screens EscaMax® feed two HUBER Wash Presses WAP® SL HP with a launder channel.
The hydraulic high-pressure unit guarantees a maximum DR
The hydraulic high-pressure unit guarantees a maximum DR
Parallel arrangement of two HUBER Screenings Wash Presses WAP® SL HP: a powerful drive ensures high dewatering performance.
Parallel arrangement of two HUBER Screenings Wash Presses WAP® SL HP: a powerful drive ensures high dewatering performance.
High turbulence in the launder tank during impeller operation
High turbulence in the launder tank during impeller operation
The "heart" of the HUBER Wash Press WAP® SL HP: swirler unit for screenings washing and hydraulic pressure unit for optimum dewatering
The "heart" of the HUBER Wash Press WAP® SL HP: swirler unit for screenings washing and hydraulic pressure unit for optimum dewatering
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Design sketch: HUBER Screenings Wash Press WAP® SL HP
Design sketch: HUBER Screenings Wash Press WAP® SL HP

Design and Function

Design sketch: HUBER Screenings Wash Press WAP® SL HP
Design sketch: HUBER Screenings Wash Press WAP® SL HP

High washout factor due to intensive washing

The feacal matter is loosened and removed from the screenings by high turbulence and shear. The washing intensity is selectable and can be adjusted to suit the specific screenings quality. After the washing cycle has been finished, an automatic valve opens and the wash water drains through perforations in the trough. It returns, together with the faecal matter, to the wastewater flow.

The washed screenings are further conveyed into the press zone where they are dewatered by means of a sturdy compacting screw. In the following automatically controlled second press zone the screenings are constantly compacted and dewatered under high pressure to a DS content of up to 60 %.

The press water from the screenings compaction is collected under the high-pressure unit and discharged along with the wash water which is rich in carbon. Automatic cleaning with water of the press and wash water collecting tank under the machine and the complete highpressure unit is possible. The washed and compacted screenings are finally transported through the conical discharge pipe into a skip.

The HUBER Launder Channel HLC Feed System for Screenings Wash Presses

The HUBER Launder Channel operates discontinuously in a batch mode or continuously. The screenings to be treated drop into the launder channel from one or several screens. Wastewater or service water is used to flush the screenings into the wash press. The flushing water serves also as wash water for screenings washing. Free transport water is returned to the system through a perforated plate.

HUBER Launder Channel HLC systems can be adjusted to suit customer-specific requirements. To ensure maximum operating reliability the launder channel control system can be designed to use redundant wash press systems and operate the individual units as needed via according valve control.

Benefits of the HUBER Launder Channel Feed System
  • Cost-effective, low maintenance solution
  • High operational reliability
  • Up to 40 m channel length
  • Individually adaptable discharge situations due to flexible launder channel arrangement
  • Wastewater or service water as flushing water
  • Stainless steel design for corrosion resistance

The Benefits of HUBER Screenings Wash Press WAP® SL HP

  • High-intensity washing in launder tank
  • Dewatering performance of up to 80 % DR
  • Volume, weight and disposal cost reduction of up to 85 %
  • Hydraulically controlled high-pressure zone
  • Return of carbon-rich filtrate to the wastewater
  • Screened wastewater or process water can be used as wash water
  • Insensitive to coarse material
  • Completely made of stainless steel (including the compacting screw)
  • Compacting screw with reinforced flights for wear protection
  • High economic efficiency due to reduced transport and disposal cost
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