Screw press for efficient, economical dewatering
The economical single solution for the filtration and dewatering of highly viscous liquids.
Industrial wastewater from the screw press
Industrial wastewater with municipal component
Industrial screenings from the screw press
Municipal screenings from the screw press
The nrw screw press as an economical solution for wastewater
with a high solids content.
The filtration / separation, storage or removal of highly viscous liquids often turns out to be very costly. Of course, this also includes wastewater with a very high proportion of solids.
The nrw screw press nrw remedies this by separating and compressing the finest solids from the wastewater.
What is a screw press?
A screw press (also known as a “screw press separator” or “dewatering screw”) separates solid from liquid components. It is used in particular where large quantities of floated sludge or solid-liquid mixtures need to be processed.
The screw press reduces disposal costs by significantly reducing the volume of materials to be disposed of. This enables economical and sustainable production processes.
Profitability and sustainability
The use of the nrw screw press nrw leads to considerable cost savings:
- Reduced disposal costs: The volume reduction significantly reduces the costs for the disposal of solids.
- Recovery of resources (recycling application): Valuable components can be recovered and reused.
- Lower energy consumption: Compared to alternative dewatering processes, the nrw presses are particularly energy-efficient.
- Low operating costs: The robust design and simple maintenance mean there is hardly any downtime.
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Your advantages with the screw press nrw
Outstanding performance and efficiency
- High dewatering performance: Significant reduction in moisture content and therefore disposal volume
- Outstanding separation performance: High separation efficiency, even with floated sludge
- Continuous operation: 24/7 operational capability for industrial applications
- Low energy consumption: Low operating costs thanks to economical drive power (at 5 to 24 rpm)
- Low noise level: Pleasant working environment thanks to low-noise operation
Robust and durable construction
- Exceptional durability: Specially designed for years of operation
- Wear-resistant materials: The particularly wear-resistant stainless steel spiral with carbide tipping can even withstand abrasive media
- Robust construction: Reliable performance even under demanding conditions
- Low speed: Gentle operation for longer component service life
Ease of use and maintenance
- Low maintenance: Minimal maintenance effort with continuous operation
- Easy cleaning: quick and uncomplicated cleaning process
- Easy parts replacement: Simplified replacement of spare parts
- Reduced downtimes: Maximum availability thanks to the maintenance-friendly design
Flexible application options
- Small footprint: compact design for efficient use of space
- Mobile unit: Easy to transport for flexible locations
- Adaptability: Suitable for different materials and throughput quantities
- Automation capability: Easy integration into existing processes
ASF 400 screw press
How the screw press works
The heart of the screw press is a screw that conveys the medium to be dewatered from the Infeed through the screen basket to the press chamber.
A compressed air operated shut-off cone closes the bale chamber. A plug is formed here from the separated solids, which closes the pressing chamber.
To achieve the desired pressing result, the back pressure of the shut-off cone can be adjusted. Feeding takes place from the top of the machine. The separated solids are discharged at the front and the cleaned substrate flows off at the bottom.
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Areas of application
Wastewater technology and sewage treatment plants
- Efficient dewatering of highly viscous liquids
- Purification of municipal and industrial wastewater
- Dewatering Screenings from the Fine sieve
industrial applications
- Process wastewater treatment in various industries
- Preparation of highly viscous liquids
- Dewatering of industrial Screenings
- Treatment of float slurries
Paper industry
- Dewatering of pulp and production residues
- Processing of fiber sludge
- Resource recovery in the production process
Food industry
- Fruit juice production and pomace dewatering
- Processing of fermentation residues
Biogas plants
- Efficient separation of fermentation residues
- Recovery of process water
- Optimization of the overall process
Recycling and environmental technology
- Treatment of waste water from PET bottles, films and other plastic recycling processes
- Filtration of landfill leachate
Maritime applications
- Dewatering of food waste
- Treatment of gray and black water
Questions & Answers
What is the dry matter content after dewatering?
Depending on the material, a dry matter content of 20-40% can be achieved, which means a considerable reduction in volume.
For which liquids is a nrw screw press suitable?
Our screw presses are suitable for Screenings, a variety of liquids and many other solid-liquid mixtures.
How high is the energy consumption of a screw press?
Compared to other dewatering methods, the energy consumption of 0.55 – 2.2 kW is very low, resulting in low operating costs.
How much maintenance do nrw screw presses require?
Our screw presses are designed for low maintenance. Regular inspection and occasional cleaning of the screen basket is usually sufficient.
Can the presses be integrated into existing systems?
Yes, our screw presses can be easily integrated into existing processes and can be combined with various feeding and removal systems.
Questions?
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Advice & Service
As a manufacturer of high-quality screw presses, we offer you:
- Individual advice on the optimum solution for your specific application
- Customized systems according to your requirements
- Professional installation and commissioning
- Comprehensive briefing for your staff
- Reliable service and fast spare parts supply
Regular maintenance and optimization of your system
Screw press with wall bracket
Basic equipment of the screw press
Screw press ASF400 in the basic version
Screw press ASF200 with encapsulated pressing zone
Drive: Made in Germany
nrw screw presses are driven by energy-efficient and highly reliable gear motors Made in Germany.
Sieve insert
The screen insert and screw must harmonize perfectly with each other and are manufactured with the greatest possible precision.
Options screw press
Gap widths from 0.1 to 1.1 mm
Special design with wall bracket
Gap widths
The screen basket can be manufactured in the gap widths 150 - 1100 microns.
Special constructions
On request, the systems can be manufactured as a special design, for example with an encapsulated pressing zone.
Material
- Stainless steel 1.4301
- Stainless steel 1.4571
- Special materials, for example 1.4462 Duplex (extremely corrosion-resistant)
Accessories screw press
Screw press ASF400 with feed hopper and encapsulated pressing zone
Screw press ASF200 hygiene encapsulated
Electrical controls
Control incl. Safety devices as standard or according to your specification.
Sagging devices
For hygienic collection and storage of the separated screenings.
Undesirable: Odour nuisance due to unpleasant smells or vermin "hatching" in the screenings.
A sagging device provides a remedy here. This also discourages animals from searching for food in screenings and spreading it over a large area.
Feed tank
With inlet flange according to DIN or ANSI.
Elevation
Underframes for adaptation to special installation conditions.
Cleaning system
For cleaning the strainer basket.
Special design
On request, the systems can be specially
adapted to your purpose.
More details about the nrw screw press?
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Please write to us if you would like more information or have any questions. We look forward to hear from you.
Stefan Fischer and Daniel Durain