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HUBER Screw Press Q-PRESS® The cost-effective sludge dewatering for independence in sludge disposal

Sludge dewatering with
  • Efficient performance data
  • Maximum operational safety
  • Optimized operating and disposal costs

The efficient and cost-effective Q-PRESS® series offers:

  • Feed capacity up to 540 kgDR/h
  • Four sizes available
  • High dewatering performance
  • Low energy demand
  • Easy operation
  • Compact, enclosed design
  • Optional mobile units

 

HUBER Screw Press Q-PRESS® 620.2 for dewatering of digested sludge
HUBER Screw Press Q-PRESS® 620.2 for dewatering of digested sludge
Stationary mounted Q-PRESS® 440.2 for 3 m³/h
Stationary mounted Q-PRESS® 440.2 for 3 m³/h
HUBER Screw Press Q-PRESS® 800.2 for 20 m³/h
HUBER Screw Press Q-PRESS® 800.2 for 20 m³/h
HUBER Screw Press Q-PRESS® 620.2 for 200 kgDR/h
HUBER Screw Press Q-PRESS® 620.2 for 200 kgDR/h
HUBER Screw Press Q-PRESS® 440.2 for dewatering of excess sludge up to 85 kgDR/h
HUBER Screw Press Q-PRESS® 440.2 for dewatering of excess sludge up to 85 kgDR/h
Double line-up of HUBER Screw Press Q-PRESS® 440.2
Double line-up of HUBER Screw Press Q-PRESS® 440.2
Q-PRESS® 440 for primary sludge dewatering
Q-PRESS® 440 for primary sludge dewatering
Q-PRESS® 280 for precipitation sludge dewatering
Q-PRESS® 280 for precipitation sludge dewatering
Q-PRESS® containerised plant
Q-PRESS® containerised plant
Mobile screw press: Q-PRESS® in a container
Mobile screw press: Q-PRESS® in a container
Sturdy wedge wire basket made of stainless steel
Sturdy wedge wire basket made of stainless steel
Dewatered faecal sludge with 35 % dry matter content
Dewatered faecal sludge with 35 % dry matter content
Q-PRESS® 280 for dewatering sludge containing impurities from earth basins
Q-PRESS® 280 for dewatering sludge containing impurities from earth basins
Three Q-PRESS® 620.2 for faecal sludge dewatering
Three Q-PRESS® 620.2 for faecal sludge dewatering
Dewatered digested sludge from a Q-PRESS® 620.2 with 32 % DR
Dewatered digested sludge from a Q-PRESS® 620.2 with 32 % DR
Dewatered surplus sludge with 24% DR
Dewatered surplus sludge with 24% DR
The sizes of the HUBER Screw Press Q-PRESS®
The sizes of the HUBER Screw Press Q-PRESS® - ltr: 280 / 440.2 / 620.2 / 800.2
Efficient flocculant mixing
Efficient flocculant mixing with HUBER Inline-Polymer-Mixer IPM
1/18
Design sketch: Partial section of a HUBER Screw Press Q-PRESS®
Design sketch: Partial section of a HUBER Screw Press Q-PRESS®

Design and Function

Design sketch: Partial section of a HUBER Screw Press Q-PRESS®
Design sketch: Partial section of a HUBER Screw Press Q-PRESS®

Sludge conditioned with flocculant is pumped via a flocculation section directly into the cylindrical filter basket of the HUBER Screw Press Q-PRESS® wherein an auger rotates at a very slow speed.

The geometry of the auger continuously reduces the volume in the filter basket so that free water is pressed out of the sludge. The auger pushes the increasingly thicker sludge towards an annular clearance past a pneumatically adjustable pressure cone at the discharge end.

A scraper on the screw shaft permanently cleans the filter basket from inside due to the rotation of the shaft. A stationary spray bar backwashes the filter basket of the HUBER Screw Press Q-PRESS® periodically and segment by segment from the outside. The dewatering process is not interrupted from size 620.2.

Parameters used for adjustment and control include not only the sludge feed and flocculant dosing and admixing, but also the screw shaft speed, the sludge feeding pressure and the pneumatic counterpressure of the discharge cone.

Innovation and Special Applications

Energy efficiency:

The screw drives exceed the current energy efficiency standards of electric motors. Due to maximised electrical efficiency the HUBER Screw Press Q-PRESS® can therefore be operated with higher solids throughputs.

Dewatering results:

Specially developed scrapers on the screw shaft permanently and reliably clean the inner filter surface with every rotation of the screw. Free water can thus very easily run off. As a result, dewatering efficiency increases and flocculant consumption is reduced. Due to the significantly enlarged open filter surface filter baskets with the same bar spacings are able to handle higher hydraulic loads without impairment of filtrate quality.

The outside of the filter is cleaned without interrupting the dewatering process. The predewatering and press zone can be washed independently of each other. Rewetting of press sludge through washing is reduced to a minimum especially in the press zone without neglecting the important washing in the predewatering zone.

Maintenance:

As an option, the three segments of the filter baskets are available as axially divided segments. Only the upper half of the basket needs to be removed for maintenance. The lower half of the filter basket can be removed from the screw shaft by means of a special mechanism but remains inside the filtrate chamber of the Q-PRESS® during maintenance. This saves a lot of time, reduces space requirements and the need for using lifting devices for maintenance.

Dewatering of thin sludges

Due to pump feeding, large volumes of sludge water are removed already in the pre-dewatering zone. This permits cost-efficient dewatering of thin sludges with a solids concentration < 1 % without the need for prior thickening. Typical dewatering results of 18 – 25 % DS can be achieved, with a sludge volume reduction up to > 97% in a single step. This saves investment and operation costs for preceding sludge thickening.

Variable sludge characteristics

Dewatering performance is usually impaired and operator attention increased by frequently varying sludge quality. Our HUBER Screw Press Q-PRESS® automatically selfadjusts to over- and underloading. A control loop makes sure that optimal operation and performance is always maintained. By this, our Q-PRESS® is flexible with varying sludge qualities and need minimised operator attention for reliable operation.

Benefits of HUBER Screw Press Q-PRESS®

High dewatering
  • Defined sludge volume reduction in the screw press
  • Continuously adjustable counterpressure at the discharge end
  • Filtrate discharge enhanced by gravity due to inclined installation
  • Unique scraper system for permanent cleaning of the inner filter surface
  • Significantly increased free filter surface
  • Continuous dewatering
Low total investment costs
  • Compact design and small footprint
  • Easy connection of the screw conveyor
  • Optional tube flocculator
  • Integrated support legs
  • Vibration-free, virtually noiseless operation
  • Fully enclosed design
  • Optional extraction of air
Reliable operation with little downtime
  • Virtually no wear because of < 1 rpm screw rotation speed
  • Sturdy stainless steel design
  • Dividable filter baskets available as an option
  • Simplified filter dividing mechanism
  • Easy access through large inspection openings
  • Minimal space requirements for maintenance
  • Simple self-monitoring control strategy
  • Proven in thousands of installations
Minimum operation costs
  • Outstanding energy efficiency
  • Specific power consumption < 8 kWh/tDR
  • Little operator attention (< 20 min/day)
  • High solids capture rate > 97 %

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Feel free to contacts us
Feel free to contact us

FAQ

Frequently Asked Questions

With a noise level of < 70 dB(A), a HUBER Screw Press Q-PRESS® operates much more quietly than high-speed decanter centrifuges. Noise protection measures are not necessary when operating screw presses. The low speed of a screw press of < 1 rpm not only ensures quiet and low-wear operation but also 60 - 80 % energy cost savings compared to centrifuges.

In contrast to centrifuges, the filtrate and dewatering levels of a Q-PRESS® are hardly reduced during start-up and shut-down phases, and the start-up and shut-down phases of the screw press can be fully automated and unattended.

The press geometry is suitable for dewatering a wide range of municipal sewage sludge types, from digested sludge, stabilised and thickened surplus sludge to fresh primary sludge. Even thin surplus sludge can be dewatered without prior thickening using the HUBER Screw Press Q-PRESS®. Excellent dewatering results are also achieved with industrial or preconditioned flotate sludge.

The HUBER Screw Press Q-PRESS® is suitable for unattended operation.

Process-relevant parameters of the Q-PRESS®, such as filtration pressure, screw speed and drive load, are permanently monitored and also automatically adjusted by the control system. This means that the machine is automatically kept in the optimum operating range even without operator intervention. A Q-PRESS® screw press can thus be operated around the clock or automatically according to a timer.

Case Studies

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HUBER complete solution: sludge treatment plant at Šumperk WWTP officially inaugurated

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Up to 80 percent savings: HUBER Screw Press Q-PRESS® minimises electricity costs for sludge dewatering

Screw presses have been proving their worth for many years at wastewater treatment plants with population equivalents ≤...

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HUBER Screw Press Q-PRESS® with world premieres at STP Sargans

Innovative optimisations had been implemented at Switzerlands first Q-PRESS® installation, amongst others a unique...

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2021-05-11 Rittersdorf, Germany

HUBER Screw Press Q-PRESS® in operation at a disposal company

Screw presses have established themselves in the dewatering of municipal and industrial surplus sludge in recent years...

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2020-05-25 Birmingham, England

Sludge dewatering in a confectionery at Mondelez, Marlbrook

HUBER Technology recently completed a project for the largest confectionery manufacturer in the UK.

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2020-03-20 Plymouth + Maer Lane, Great Britain

Sludge dewatering with the HUBER Screw Press Q-PRESS®

HUBER Technology have been working on establishing the Q-PRESS® as the go to technology for sludge dewatering.
Sludge...

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2019-07-24 Plymouth, England

New TOTEX solution for Sludge Dewatering at Plymouth

Site operators at Plymouth Central STW wanted a more reliable and less labour intensive option to de-watering than a...

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2019-04-04

Dynamic inline mixer for optimized sludge dewatering

The efficient flocculant mixer achieves a significant reduction of operating costs.

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2018-03-19 Freystadt, Germany

From thin sludge to dry granulate – all from one source

HUBER sludge treatment solution on STP Freystadt – a concept that pays off for the operators

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2017-06-23 Bad Orb, Hessen, Germany

New HUBER Screw Press Q-PRESS® 620.2 for sludge dewatering: operational experience on STP Bad Orb

In April 2016, a new sludge dewatering system for STP Bad Orb was put out to tender to replace a chamber filter press....

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2017-06-22 Schwarzenfeld, Germany

HUBER sludge dewatering solution for new wastewater treatment plant in a dairy industry

The dairy company Bechtel recently built its own new industrial wastewater treatment plant. HUBER supplied three screw...

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2016-05-05

Q-PRESS® – The new HUBER Screw Press

Over the past ten years HUBER Screw Press units have become the worldwide leading products among the screw presses on...

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2016-03-17 Osečina, Serbia

HUBER flotation plant and screw press are a great help with the apple harvest in Serbia

A HUBER Dissolved Air Flotation Plant HDF is used by the company Podgorina Frucht as biological wastewater treatment.

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2013-04-11 Hämeenlinna, Finland

Cost-efficient, low wear: HUBER Screw Press Q-Press® in Finland

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2011-02-15 Penzing, Germany

Solar sewage sludge drying – a reasonable solution if based on intelligent and sustainable design

To make the implementation and operation of a solar drying plant a sustainable success, all relevant aspects need to be...

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