HUBER Screenings WashPress WAP(R), WAP-L , WAP-SL
For high efficiency washing and compaction of screenings and other solids
- Different sizes for up to 18m3/hr of throughput
- Volume, weight and disposal cost reduction of up to 85%
- Compaction of up to 50% DS
- High washed screenings quality of <20mg BOD
- Over 370 UK installations
The WAP/SL operates in a batch mode operation whilst still allowing either screenings or launder to enter the unit whilst it goes through its washing cycle. Screenings either drop into the hopper directly from a screen or conveyor, or they are flushed into the hopper via a launder channel.
After a batch of screenings has been fed, the tank is filled up with wash water (dry feed only) or launder water and agitated for an adjustable period by means of an impeller.
The faecal matter is loosened and removed from the screenings by high turbulence and shear.
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.
An auger in the trough conveys the screenings towards the discharge pipe.
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 skip.
Feeding through a launder channel
The screenings drop from the screen or conveyor into a launder channel. Screened wastewater or process water flushes the screenings through the launder channel and into the hopper of the washpress.
The launder water also serves as wash water in the hopper to wash the organic matter from the screenings.
Note: There is no need to stop the launder feed whilst the unit is undertaking its intensive wash cycle.
Feeding directly from a screen or conveyor
The screenings drop from the screen or conveyor into the washpress hopper.
Screened wastewater or final effluent is then directly introduced into the hopper to wash the organic matter from the screenings.
Note: There is no need to stop the direct or conveyor feed whilst the unit is undertaking its intensive wash cycle.
- Very clean screenings due to volume, weight and disposal cost reduction of up to 85%
- High-intensity washing in the hopper
- Washed screenings quality < 20 mg BOD5 / g DS
- Compaction up to 50 % DS
- Screenings processing capacity of up to 18 m3/h from 5 different sizes of units with variable speed drives.
- Screened wastewater or final effluent 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
- Control panels designed and built in the UK