Disc Dewatering Press for Sludge Dewatering!
A GRATT Disc Dewatering Press is equipment developed for the continuous dehydration of sludge from water treatment plants (ETA), industrial effluents (ETE) and sanitary sewage.
Its operation is based on separating the sludge into two fractions: a liquid, which returns to the treatment system, and a solid, with reduced moisture content, facilitating transport and final disposal.
It is a modern, compact and efficient solution, ideal for plants seeking to reduce sludge volume with low energy consumption and high operational reliability.
How does it work?
The dehydration process occurs continuously and automatically, divided into well-defined stages:
Initially, the system prepares the polymeric solution, where the polymer is dosed into treated water in a controlled manner, with continuous and automatic stirring, ensuring adequate homogenization.
Next, the sludge is pumped to the mixing chamber, where it receives the polymer solution dosage. This process promotes the formation of larger flakes (coagulation), essential for improving the efficiency of solid-liquid separation.
After conditioning, the sludge goes to the dewatering zone, where a helical shaft guides the material through a set of fixed and movable discs. As the sludge advances, the pitch of the helicoid decreases, gradually increasing the internal pressure.
This increase in pressure forces water out through the openings between the discs, while the sludge is compacted until it reaches its final dehydrated form.
The extracted liquid returns to the process for treatment, while the dehydrated sludge is discharged for appropriate disposal.
Technical Characteristics
- System of mobile and fixed discs for continuous dewatering
- Helical shaft with variable pitch for progressive pressure increase
- Low speed operation
- Noise level less than 70 dB
- Automated polymer preparation and dosing system
- Compact structure and easy installation
- Continuous operation with low intervention
Construction and materials
The GRATT Disc Dewatering Press is manufactured with AISI 304 stainless steel, material composed of iron, chromium and nickel, ensuring:
- High corrosion resistance
- Oxidation resistance
- Durability in aggressive environments
- Compatibility with different types of effluents
This robust construction ensures long service life and reliability even under severe operating conditions.
Operational advantages
- System of mobile and fixed discs for continuous dewatering
- Helical shaft with variable pitch for progressive pressure increase
- Low speed operation
- Noise level less than 70 dB
- Automated polymer preparation and dosing system
- Compact structure and easy installation
- Continuous operation with low intervention
Disc Dewatering Press Applications
The press is recommended for:
- Sewage Treatment Plants (ETE)
- Water Treatment Plants (ETA)
- Chemical, food and paper and cellulose industries
- Processes generating biological or physicochemical sludge
Efficient Solution for Sludge Volume Reduction
A GRATT Disc Dewatering Press stands out as one of the most efficient and economical solutions for sludge dehydration, combining modern technology, low energy consumption and high performance.
Its use directly contributes to reducing operational costs, improving disposal logistics and increasing the overall efficiency of treatment systems.
