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HUBER Screenings Wash Press WAP® A cost-effective method of screenings washing for any application

The HUBER Wash Press WAP® – A cost-effective method of screenings washing!

Screenings Wash Press for any application

  • Dewatering perfomance up to 45 % DS
  • Weight reduction up to 75 %
  • Throughput up to 12 m³/h
  • Automatic wear detection
  • Completely made of stainless steel
HUBER Screenings Wash Press WAP®
HUBER Screenings Wash Press WAP®
HUBER Screenings Wash Press WAP® L with launder channel feed and redundant wash press operation according to knive valve position
HUBER Screenings Wash Press WAP® L with open launder channel feeding. Redundant wash press operation according to knive valve position.
Reliable screenings treatment with the HUBER Screenings Wash Press WAP®
Reliable screenings treatment with the HUBER Screenings Wash Press WAP®
Two screens discharging into one Screenings Wash Press WAP®
Two screens discharging into one Screenings Wash Press WAP®
Typical application – direct feeding of a HUBER Screenings Wash Press WAP® from screens
Typical application – direct feeding of a HUBER Screenings Wash Press WAP® from screens
Washed and compacted screenings in the discharge pipe
Washed and compacted screenings in the discharge pipe
Reliably separated, washed and compacted screenings
Reliably separated, washed and compacted screenings
Typical combination of a HUBER Screenings Wash Press WAP® with a HUBER STEP SCREEN®. The WAP® is used as an intermediate plug conveyor to feed a consecutive HUBER Screenings Wash Press WAP® SL HP.
Typical combination of a HUBER Screenings Wash Press WAP® with a HUBER STEP SCREEN®. The WAP® is used as an intermediate plug conveyor to feed a consecutive HUBER Screenings Wash Press WAP® SL HP.
Fully redundant screenings treatment step with preceeding material flow gateway in the conveyor
Fully redundant screenings treatment step with preceeding material flow gateway in the conveyor
HUBER Screenings Wash Press WAP® typical combination with a HUBER STEP SCREEN®
HUBER Screenings Wash Press WAP® typical combination with a HUBER STEP SCREEN®
Large scale screenings treatment with discharge in a common conveyor system
Large scale screenings treatment with discharge in a common conveyor system
HUBER Sludge Acceptance Plant RoFAS in combination with HUBER Screenings Wash Press WAP®
HUBER Sludge Acceptance Plant RoFAS in combination with HUBER Screenings Wash Press WAP®
WWTP Knostrop (UK, 2 million PE): HUBER Launder Channel - 20 m³ wastewater per second
WWTP Knostrop (UK, 2 million PE): HUBER Launder Channel - 20 m³ wastewater per second
HUBER Wash Press WAP L with launder channel feed by a closed downpipe
HUBER Wash Press WAP L with launder channel feed by a closed downpipe
Launder channel feed: The flushing water serves also as wash water.
Launder channel feed: The flushing water serves also as wash water.
HUBER Launder Channel system feeding redundant HUBER Wash Press L units
HUBER Launder Channel system feeding redundant HUBER Wash Press L units
Parallel HUBER Wash Preses with launder channel feeding
Parallel HUBER Wash Preses with launder channel feeding
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Design sketch: HUBER Screenings Wash Press WAP® SL
Design sketch: HUBER Screenings Wash Press WAP® SL

Design and Function

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

The screenings to be treated are discharged directly from a screen or conveyor (e.g. screw conveyor) into the feed trough of the Wash Press. A robust conveying and com­pacting screw transports the screenings into the wash zone where they are exposed to directed and powerful turbulence created by automatic introduction of wash water (service water).

The turbulence achieves perfect sep­aration of organic particles and thus effective screenings washing. The washing intensity and cycles are individual­ly adjustable.

The washed screenings are further conveyed in the rising pipe to the press zone where they are pressed and dewa­tered by the compacting screw to a DR content of 35 - 45 %.

The wash water from screenings compac­tion which is rich in carbon is discharged back into the waste water stream. Automatic cleaning of the wash water collecting tank under the machine is possible.

The washed and compacted screenings are finally transport­ed through the conical discharge pipe into a skip. For an optimised maintenance strategy, machine sizes 2-12 are equipped with wear detection of the compact­ing screw in the press zone. The system automatically detects the ideal time for maintenance of the auger.

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.

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 the HUBER Screenings Wash Press WAP®

  • Dewatering performance of up to 45 % DR
  • Volume, weight and disposal cost reduction by up to 75 %
  • Screenings throughput capacity of up to 12 m3/h
  • Completely made of stainless steel (including the com­pacting screw)
  • Acid treated in a pickling bath for corrosion protection
  • Return of carbon-rich filtrate to the wastewater
  • Insensitive to coarse material
  • Screened wastewater or process water can be used as wash water
  • Flexible feed trough lengths
  • Fast payback due to great transportation and disposal cost savings
  • Automatic wear detection of the compacting screw

Media

Videos and Animations

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.

Case Studies

HUBER Solutions in Operation

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2023-02-15 Faroe Islands

HUBER supplies machines for faecal sludge treatment on the Faroe Islands

Future-oriented technology for the treatment of faecal sludge on the Faroe Islands: a reference in the midst of...

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2017-11-13 Linz-Asten, Austria

Refurbishment project: regional STP Linz-Asten

On the largest sewage treatment plant in Upper Austria with a design size of 950,000 PE, the coarse screens were...

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2017-07-25 Devon, England

Improvement of the Maer Lane STW Inlet Works

HUBER Technology recently completed and commissioned a large project for South West Water to improve the inlet works...

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2016-05-02 Vienna,
Austria

Major order: 12 HUBER Multi-Rake Bar Screens RakeMax® for Vienna

Extensive modernisation of the Vienna wastewater screening plant: six HUBER Multi-Rake Bar Screen RakeMax® units with 8...

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2015-01-22 Waßmannsdorf-Berlin, Germany

HUBER supplies the equipment for a major sewage treatment works in Berlin

The wastewater in Germany’s capital Berlin is cleaned by a total of 6 large sewage treatment plants. One of them...

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2011-10-25 Tula Valley of Hidalgo, Mexico

HUBER supplies the machines for the mechanical treatment stage of the worlds’ largest wastewater treatment plant project

The largest sewage treatment plant under construction in the world lies in the Mexican Tula Valley of Hidalgo. HUBER SE...

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Pair of 20 m³ slurry receiving tanks with Ro 8 screw conveyors
2007-11-08 Emschermündung,
Germany

Grit Recycling at the Largest German WWTP

The hydraulic capacity of the wastewater treatment plant Emschermündung is 30 m³/s. This is a gigantic flow, larger than...

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