HUBER Screenings Wash Press WAP® SL Super launder wash press

Function

Super Launder Wash Press for disposal cost reduction

Volume, weight and disposal cost reduction of up to 85 %
Compaction up to 50 % DR
High washed screenings quality of (< 20 mg BOD5 / g DR)
Reduction of disposal costs by up to 10 % compared to simple wash press systems

The HUBER Screenings Wash Press WAP® SL operates in a batch mode. Screenings either drop into the wash press trough directly from a screen or conveyor, or they are flushed into the trough through a launder channel.

After a batch of screenings has been fed, the trough is filled up with wash water and agitated for an adjustable period by means of an impeller. The fecal matter is loosened and removed from the screenings by high turbulence and shear.

HUBER Screenings Wash Press WAP® SL

Well washed and virtually odorless screenings from a HUBER Screenings Wash Press WAP® SL, compacted to 50 % DS

Redundant, double-screw HUBER Screening Wash Presses WAP® SL 12, feed is realized by a open-top launder channel

High turbulence in the launder tank during impeller operation

Highly turbulent full water bath for screenings washing ensures a maximum washing degree and thus best dewatering performance

An ideal combination in case of a sufficient drop-off height of the installed screens: A launder channel sluices the screenings into a redundant HUBER Screenings Wash Press WAP® SL

A launder channel sluices the screenings into a redundant HUBER Screenings Wash Press WAP® SL

HUBER Rotary Drum Fine Screens ROTAMAT® Ro2 feed a HUBER Screenings Wash Press WAP® SL: optimum washout and dewatering to 35-40% DR

HUBER Screenings Wash Press WAP® SL after a vertical conveyor. The pressed screenings are passed over a grinder and transported to container loading.

Mechanical treatment with HUBER screens and Screenings Wash Presses WAP® SL being fed by launder channels

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Design sketch: HUBER Screenings Wash Press WAP® SL

Design and Function

Design sketch: HUBER Screenings Wash Press WAP® SL

After the washing cycle has been finished, an automatic valve opens and the wash water drains through perforations in the trough. The discharge of the washed screenings along with the compaction and dewatering of the screenings takes place in the following step in a single operation.

The screw pushes the screenings through the pressure zone where they are compressed, dewatered and compacted before they are finally discharged through the discharge pipe into a dumpster or bagger.

Feeding through a HUBER Launder Channel HLC

The screenings drop from the screen or conveyor into the HUBER Launder Channel HLC. Screened wastewater or process water flushes the screenings through the launder channel into the trough of the HUBER Screenings Wash Press WAP® SL. The flush water also serves as wash water in the trough.

Feeding directly from a screen or conveyor

The screenings drop from the screen or conveyor into the trough. Screened wastewater or process water is directly introduced into the trough as wash water.

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

Very clean screenings due to volume, weight and disposal cost reduction of up to 85%
High-intensity washing in launder tank
Washed screenings quality < 20 mg BOD5 / g DR
Compaction up to 50 % DS
Screenings processing capacity of up to 12 m3/h

Screened wastewater or process water can be used as wash water
Sturdy, durable design
All structural parts, including the screw, are made of stainless steel to prevent corrosion
Fast payback due to great transportation and disposal cost savings
Reduction of disposal costs by up to 10 % compared to simple wash press systems

Media

Videos and Animations

Video: Screenings Wash Press WAP/SL at a municipal WWTP

Video: HUBER Launder Channel HLC feeding a Wash Press

Video: Screenings Wash Press WAP/SL at a municipal WWTP

Example: municipal WWTP Weiden

Video: HUBER Launder Channel HLC feeding a Wash Press

A Launder Channel beeing fed by HUBER Belt Screens EscaMax® prior to HUBER Wash Presses WAP® SL

Downloads

Customer Information and Documents

Brochure: HUBER Screenings Wash Press WAP® SL Brochure: HUBER Launder Channel HLC (feed system) Brochure: HUBER Wash Presses Wear Detection

More information needed?

Feel free to contact us

FAQ

Frequently Asked Questions

Due to the highly carbonaceous composition of the loaded wash water, the C/N ratio of the entire treatment plant influent is positively influenced. Depending on the screen aperture size and the inlet situation of the sewage treatment plant, the C/N ratio can be improved by up to 6 %, and thus the denitrification performance in the case of unfavourable nutrient ratios in the sewage treatment plant.

After washing, the screenings are compacted so that the water content in the washed screenings is significantly reduced. As a result of washing out the faecal matter, a significant improvement in screenings dewatering is observed in many cases.