ANDRITZ Sludge Screw Press SCS

Proven and efficient technology tailored for sludge dewatering applications. ANDRITZ offers a comprehensive portfolio of sludge dewatering systems designed for all types of fibrous and biological sludges in the paper industry. Each sludge type presents unique dewatering challenges, and ANDRITZ provides tailored solutions for every application.

To assess the dewatering potential of these sludges, ANDRITZ offers testing services at its pilot plant in Graz, Austria. Alternatively, arrangements can be made for on-site testing at your mill using the mobile test unit provided by ANDRITZ.

Sludge Screw Press SCS: highest capacity, highest dryness:

The SCS Sludge Screw Press from ANDRITZ boasts the highest capacity and optimal dryness levels. Engineered for exceptional throughput and stringent dryness demands, it features a conical shaft and progressively pitched flights on the screw to efficiently dewater sludge through a reinforced screen basket. Automatic backpressure control at the discharge end prevents blockages and ensures peak dryness, adapting to varying sludge compositions. Furthermore, the inclusion of a shaft dewatering zone and optional steam heating can elevate sludge dryness to 65%.

Gravity Table GT: effective pre-dewatering of sludge with low solids in filtrate:

The ANDRITZ Gravity Table GT offers effective pre-dewatering of sludge with low solids content in the filtrate. It serves as the initial dewatering stage before subsequent pressing operations such as pressure filters or sludge screw presses. By harnessing gravity, it thickens the sludge from a feed consistency of 0.6–5% to a discharge consistency of 10–18%. The gentle treatment ensures minimal flocculent consumption and reduces the filtrate load compared to other pre-dewatering systems.

Key Advantages of the ANDRITZ Gravity Table GT include:

• - High thickening capacity
• - Low energy consumption
• - Minimal flocculent usage
• - Reduced solids load in the filtrate
• - Floating press roll for enhanced discharge consistencies

Thickening Drum TD: efficient and reliable sludge thickening:

The Thickening Drum TD by ANDRITZ offers efficient and dependable sludge thickening. As a rotary screen thickener, it presents a superior option to gravity belt thickeners for ongoing sludge dewatering, primarily due to its minimal space requirement.

Its compact design leads to reduced investment outlays, while its low specific power consumption, straightforward maintenance, and minimal wear on critical components contribute to maintaining low operating costs.

Advantages of the ANDRITZ Thickening Drum TD include:
- Cost-effective investment facilitated by intelligent machine design
- High thickening efficiency, achieving outlet consistencies of 8-16%
- Reduced energy consumption and operating expenses
- Simple maintenance procedures and rapid wire replacement
- Small footprint resulting from its compact design

Sludge Screw Press SCS: highest capacity, highest dryness:

The ANDRITZ Sludge Screw Press SCS offers unparalleled 

capacity and superior dryness. Engineered for high throughput and stringent dryness standards, it features a conical shaft and screw flights with decreasing pitch to efficiently dewater sludge through a reinforced screen basket. Automatic backpressure control at the discharge end prevents blockages and ensures optimal dryness, even when dealing with varying sludge compositions. With the inclusion of a shaft dewatering zone and optional steam heating, sludge dryness levels can reach up to 65%.

Advantages of the ANDRITZ Sludge Screw Press SCS include:
- Single-line solution with a throughput of up to 180 t/d
- Shaft dewatering for enhanced final dryness
- Optional steam feeding for maximizing dryness
- Self-adjusting backpressure unit
- Fully enclosed system

Continuous Pressure Filter CPF: versatile dewatering for diverse sludges:

The ANDRITZ Continuous Pressure Filters (CPF) feature a modular double-wire press design. These filters enable optimized dewatering, even for challenging sludges.

Tailored machine concepts are employed based on sludge characteristics: The CPF Rhino handles a broad spectrum of mixed sludges with low fiber and significant biological content, while the CPF Hippo excels with highly press-stable fibrous sludges. Additionally, all ANDRITZ continuous pressure filters can be equipped with an integrated pre-dewatering table or ideally combined with the ANDRITZ Gravity Table.

Advantages of the ANDRITZ Continuous Pressure Filter CPF include:

Adaptive modular design for varied conditions
Achieves high dryness in thickened sludge
Low specific energy consumption
High throughput accompanied by excellent filtrate quality
Offers flexible press forces
Maintenance-friendly design for easy accessibility