A Dewatering Screw Press is a robust and energy-efficient mechanical device used to separate liquids from solids in a wide range of industrial slurries and fibrous materials. It is particularly effective in processes where high moisture content needs to be reduced to improve handling, reduce disposal costs, or prepare material for further processing such as drying, composting, or incineration.
At its core, the machine operates on the principle of pressure-driven separation using a slow-moving screw housed inside a perforated or slotted cylindrical screen. As the material is fed into the press, the screw gradually pushes it forward through zones of increasing pressure. Liquid (filtrate) escapes through the screen while the solids are compressed and discharged from the opposite end as a relatively dry cake.
Feed Hopper: Accepts the slurry or wet material to be processed.
Screw Shaft (Auger): Rotates at a low RPM to minimize shear and power consumption while gradually building pressure.
Perforated Screen or Mesh: Allows the liquid to escape while retaining the solids.
Backpressure Adjustment Mechanism: Controls the final dryness of the discharged solids.
Drive Motor and Gearbox: Provide the necessary torque for compression.
How It Works – Step-by-Step Process:
Feeding: The slurry (e.g., sludge, pulp, biomass, or organic waste) is fed into the inlet of the screw press.
Conveying & Compression: The rotating screw conveys the material forward while gradually compressing it.
Separation: As pressure builds, liquid is forced out through the surrounding screen. The rate of separation can be optimized based on the material type.
Discharge: The dewatered solid material exits as a cake from the press outlet, while the extracted liquid is collected separately for reuse, treatment, or disposal.
Why Choose a Screw Press?
Low Energy Consumption: Minimal power usage compared to other mechanical dewatering systems.
Compact Design: Requires less space and maintenance.
Continuous Operation: Suitable for 24/7 industrial use with minimal supervision.
Customizable: Can be adapted for various capacities, materials, and moisture targets.
The α Series Conical Screw Press is purpose-built for challenging dewatering tasks where achieving maximum dryness is essential. With a gradually tapering screw profile — wider at the inlet and narrower at the discharge — the press delivers progressive compression and high torque, enabling it to handle fibrous, high-moisture materials with minimal free water content.
Ideal for continuous, heavy-duty industrial operations, the α Series offers a longer screen zone, robust mechanical design, and customized configurations to meet the needs of demanding applications across various industries.
Key Features
Conical screw design for increasing compression force along the length
High torque capability for dense, difficult-to-dewater materials
Extended screen length to maximize residence time and liquid extraction
Engineered for durability, minimal downtime, and low maintenance
Available Sizes
From 8-inch diameter units for pilot or small-scale lines to 30-inch diameter machines for high-capacity, round-the-clock operations.
Typical Applications
Pulp & Paper – Recovery and drying of virgin or recycled fiber
Spent Brewer’s Grains – Reducing bulk moisture for storage or feed use
Tea Spent – Extracting residual moisture post-brewing in tea processing
MSW Waste (Organic Fraction) – Volume and moisture reduction for downstream handling
These are just a few representative applications — the α Series is well-suited for any fibrous material where high dryness and mechanical robustness are essential.
The β Series Cylindrical Screw Press is engineered for applications requiring moderate dewatering with consistent, reliable performance. Featuring a uniform screw diameter from inlet to outlet, this series provides stable operation, simplified maintenance, and excellent control — making it ideal for materials with moderate fiber content and less demanding torque requirements.
Its straight-through design makes it a great fit for a wide variety of installations, whether retrofitting into existing lines or used in new processing plants.
Key Features
Uniform screw geometry ensures consistent compression and steady dewatering
Simplified mechanical structure reduces maintenance time and cost
Efficient handling of mid-range fibrous and pulpy materials
Compact and easy to integrate into process lines across industries
Customizable screw flights: Options for uniform or reducing pitch, with the availability of cut flights to enhance performance based on specific material characteristics
Available Sizes
Manufactured with screw diameters ranging from 100 mm to 500 mm, tailored to the required throughput and material characteristics.
Typical Applications
Fruit & Vegetable Pulp – Juice separation and fiber recovery
Soft Organic Waste – Market waste, food scraps, and similar organic materials
Plastics Recycling Wash Water – Separation of solids from wash processes
Snack Chip and Potato Peel Waste – Dewatering of snack food production waste
Manure and Agricultural Waste – Dewatering of livestock and farm waste
Seafood Processing Waste – Dewatering of fish and shellfish residues
These are representative examples — the β Series is versatile enough to handle a wide range of fibrous or pulpy inputs, and continues to be a preferred choice in food, pharmaceutical, recycling, and bio-based industries.
The γ Series Multi Disk Screw Press is designed for continuous and automatic dewatering of low-solids slurries, typically ranging between 0.5% to 5% consistency. Using a combination of an internal screw and alternating moving and stationary rings, this system delivers reliable, energy-efficient, and low-maintenance performance, especially in municipal and industrial sludge applications.
This series is built for clients seeking:
Low energy consumption
Minimal operator involvement
Compact design for limited floor space
Consistent dewatering with minimal wash water requirement
Key Features:
Self-cleaning disk stack – Prevents clogging without external spray nozzles
Integrated flocculation tank – Ensures homogenous mixing of polymer and slurry
Slow-speed, quiet operation – Ideal for installations in urban or noise-sensitive environments
Fully automated – Runs unattended with minimal supervision
Low water and power requirement – Contributes to long-term operational savings
Typical Applications:
Municipal STP and ETP sludge
Biogas digestate
Food processing effluent sludge
Agricultural runoff treatment
Pre-thickening before drying or composting
The system can consistently achieve 20–30% outlet solids, depending on sludge characteristics and polymer optimization.
Available Sizes:
The γ Series is available in screw diameters ranging from 100 mm to 500 mm, and can be configured in single, twin, triple, or quadruple head formats, depending on capacity requirements. This modular approach ensures flexibility for both small-scale units and large continuous operations.
