Screw Dewatering Machines

Screw Dewatering Machines (organic waste separators) by TechnoMaszBud are advanced industrial machines designed for the efficient, mechanical separation of the solid fraction from the liquid fraction in raw materials with a high degree of moisture content (from 85% to 95% moisture).

They are widely used in modern agriculture, livestock farms, biogas plants, distilleries, breweries, and agri-food processing plants. Screw separators eliminate the need to use expensive flocculants and chemical coagulants thanks to the use of fully mechanical elements, which greatly reduces operating costs and facilitates the utilization of the resulting material.

How does a screw separator for organic waste work?

The operating principle of the dewatering machine is based on a low-speed working screw that transports the fed material along a cylindrical screen drum. As the material moves in the working chamber, axial and radial pressure increases. The liquid fraction passes through the precise screen slots and is discharged into the lower wastewater collector. The dewatered solid fraction, in turn, is compacted and pushed by an adjustable pressure mechanism used for pressing the material to the outside of the machine, where the finished material is collected. Pressure adjustment makes it possible to match the capacity and the level of dewatering to the type of processed material.

Main advantages of TechnoMaszBud dewatering machines:

• Chemical-free operation: The process is carried out entirely mechanically – without the addition of coagulants.
• Stainless steel elements: The working screw and the screen drum are made of high-grade steel resistant to an aggressive organic environment and corrosion.
• Adjustable pressure level: Precise back-pressure adjustment makes it possible to adapt the final moisture content of the press cake to current technological needs.
• Self-cleaning effect: The screw design prevents screen slot clogging during continuous operation.
• Energy efficiency and reliability: The low-speed drive reduces component wear and minimizes power consumption. In addition, the control cabinet is protected against overload, voltage drop, and leakage current.

Models of Screw Dewatering Machines in the TechnoMaszBud offer

We offer three proven models of organic separators from the SL series, adapted to varied production volumes:

1. Screw dewatering machine SL-180 (7 kW | up to 6 m³/h)

A compact and economical separator designed for smaller farms, local fruit and vegetable processing plants, and pilot biogas installations. Despite its smaller dimensions, it guarantees the full functionality of larger models, providing a capacity of up to 6 m³/h with low power consumption (7 kW).

2. Screw dewatering machine SL-230 (8.5 kW | up to 12 m³/h)

A universal model representing an optimal compromise between capacity, energy consumption, and purchase cost. With a capacity of up to 12 m³/h and an 8.5 kW motor, it is the most frequently chosen solution by medium-sized livestock farms, agricultural biogas plants, and food industry plants (dewatering brewer's spent grain, pomace, sludge).

3. Screw dewatering machine SL-280 (10.5 kW | up to 15 m³/h)

The highest-capacity, reinforced unit in the series, designed for continuous operation in a multi-shift mode. A 7.5 kW + 3 kW kW motor and an enlarged working chamber allow the separation of up to 15 m³ of material per hour. A model dedicated to large agricultural enterprises, industrial biogas plants, and organic waste treatment and recycling plants.

Main areas of application

• Dewatering of slurry (cattle and pig): Reduction of the volume of stored slurry, obtaining dry organic fertilizer or valuable material for bedding / compost.
• Biogas plants: Separation of digestate into a liquid fraction (liquid fertilizer) and a solid fraction (easier to transport and store).
• Brewing and distilling industry: Thickening and dewatering of brewer's spent grain and distillery stillage for feed purposes.
• Fruit and vegetable processing: Dewatering of pomace, pulp, beet pulp, and peelings before further drying or pelletizing.

Are you looking for help in selecting the right dewatering machine or do you want to carry out tests on your material? Contact our technical advisors -– we will select a model and screen parameters tailored to your production profile. Call the number provided at the top.