C-Press screw press

The ANDRITZ C-Press screw press is a state-of-the-art solution in industrial machinery for sludge dewatering. Designed for high equipment performance, it combines advanced press technology with intelligent process automation to deliver reliable results in wastewater treatment and other separation technology applications. With a compact footprint, low lifecycle cost, and high energy efficiency, the C-Press is ideal for municipal and industrial use.

Why choose the ANDRITZ C-Press screw press?

High dewatering performance with low energy consumption

The C-Press achieves exceptional dryness levels through a multi-stage mechanical press system. Unlike traditional hydraulic presses, it uses a conical shaft and pneumatic counter-pressure to optimize compression. This results in high throughput and low energy usage, making it a benchmark in energy-efficient sludge treatment.

Fully automated operation with minimal maintenance

Equipped with the Metris addIQ control system, the C-Press offers real-time monitoring and adaptive control. It automatically adjusts speed and process parameters based on feed conditions, reducing operator supervision. Maintenance is simplified through modular components and accessible tooling, minimizing downtime and extending the machine’s lifecycle.

Compact and safe industrial design

The enclosed design ensures quiet (<60 dB(A)) and odor-free operation, enhancing workplace safety. Its compact structure allows easy integration into existing industrial machinery setups, whether in manufacturing plants or wastewater facilities.

Screw Press C-Press for sludge dewatering

Screw Press C-Press C12060 for an average dry solids throughput from 420 to 1,300 kg/hr

How the C-Press screw press works

Operating principle: From flocculation to final dryness

After flocculation, sludge is fed into the press where a slow-rotating screw conveys it through a conical shaft. The mechanical press action gradually increases pressure, while a pneumatic system ensures consistent compression. This cold forming process enhances separation technology efficiency without damaging sludge structure.

C-Press for efficient sludge dewatering

Dual cleaning system for continuous operation

The C-Press features a dual cleaning system that separately cleans the thickening and squeezing zones. This innovation reduces water consumption and allows uninterrupted operation, even during cleaning cycles - critical for maintaining high equipment performance in demanding environments.

Explore the C-Press screw press

Key benefits at a glance

Fully automatic operation with continuous control of screw speed, counter-pressure, and washing cycles, ensuring consistent performance with minimal operator intervention .
High dewatering capacity and performance achieved through multi-stage dewatering zones and a conical screw shaft that gradually increases pressure for maximum dryness .
Low energy consumption compared to other dewatering technologies, contributing to reduced lifecycle costs and improved energy efficiency.
Low wash water thanks to dual cleaning system that separately cleans the thickening and squeezing zones, reducing water consumption by up to 50% and allowing uninterrupted operation—even during cleaning.
High capture rate thanks to an optimized basket design developed from over 20 years of experience in screw press engineering.
Compact and enclosed design minimizes odor emissions and ensures low noise (<60 dB(A)), enhancing workplace safety and cleanliness.
Optimized flocculation mixing device reduces polymer consumption and energy demand, supporting sustainable sludge treatment.
Easy maintenance features, including optional split basket design, fiberglass covers, and easy-access strip design for fast servicing without removing the screw or basket.
Robust construction with stainless steel wetted parts and a basket made of two perforated plates (screen and support cage), allowing replacement of the inner screen without full basket removal.
Available in multiple configurations, including turnkey installations and mobile units for on-site or lab testing, with throughput capacities ranging from 20 to 1,300 kg DS/h.
Simplicity of operation and maintenance (without need of qualified personnel).
Operator confidence and simplicity with extra low speed operating machine.

Application and use cases

Municipal wastewater treatment

The C-Press is widely used in municipal facilities for sludge dewatering, offering consistent performance and low operating costs.

Industrial sludge processing

From chemical manufacturing to food production, the C-Press handles diverse sludge types with precision, making it a trusted supplier solution in industrial sectors.

Mobile and on-site testing units

Available in trailer-mounted configurations, the C-Press supports temporary operations and pilot testing, offering flexibility for both permanent installations and mobile units.

C-Press mobile unit, easily transportable with light vehicle

ANDRITZ screw press C-Press for sludge dewatering

C-Press trailer for an efficient and energy-friendly sludge dewatering in move

Technical specifications and performance range

Capacity, force, and stroke parameters

Models range from 20 to 1,300 kg DS/h, with feed capacities between 1 and 96 m³/h. Stroke and force parameters are optimized for each unit, ensuring consistent performance across applications.

Tooling, liners, and construction materials

All wetted parts are made of stainless steel. The basket system includes perforated plates supported by a robust cage, with replaceable liners (internal screens) and tools designed for long-term durability.

Automation dies and control systems

The Metris addIQ platform enables full process automation, including remote diagnostics, performance tracking, and predictive maintenance. This reduces lifecycle cost and enhances operational reliability.

Size	Feed capacity* (m³/hr)	Average dry solids throughput* (kg/hr)	Drive power (kW)
40-10	1-5	20-85	0.75
40-20	2-10	50-125	1.5
54-27	4-20	100-300	1.5
70-35	9-26	125-450	2.2
100-50	18-50	300-890	3
120-60	25-96	420-1,300	5.5

* Higher flow rate for specific product and low concentration

Service, support, and customization options

OEM spare parts and upgrades

ANDRITZ offers certified spare parts and upgrade kits tailored to your press configuration, ensuring long-term reliability and performance optimization.