Fixed Agitators with Internal & External Support for Sludge Treatment
These fixed agitators are specially designed for mud and sludge digesters, providing effective circulation, mixing and surface crust breaking in demanding wastewater and sludge-treatment applications.
The agitator incorporates internal and external shaft support, a geared speed reducer and a flexible coupling between the drive and agitator shaft. A dedicated seal-protection arrangement helps protect the shaft and drive assembly from the process environment.
For easier installation and maintenance, the agitator shaft can be manufactured in two sections connected by a strong bolted coupling, allowing the shaft sections to be separated when required.
A two-stage screw-type impeller is positioned at the lower end of the shaft. During operation, the impeller lifts sludge and liquid from the lower part of the digester through the circulation tube. The flow is then redirected toward the surface, creating circulation and helping to break up the sludge crust and reduce surface accumulation.
The resulting surface movement also improves contact between the sludge and available oxygen, supporting biological treatment processes where aeration and oxygen transfer are part of the system design.
These agitators are particularly suitable for wastewater treatment, sludge digestion and drilling mud applications where continuous circulation and prevention of surface crust formation are required.
Description
A heavy-duty fixed agitator specifically developed for mud and sludge digesters. The combination of a supported shaft, geared drive and two-stage screw impeller provides strong vertical circulation from the bottom of the vessel toward the surface, helping maintain sludge movement and break up surface crust formation.
Features
- Special design for mud and sludge digesters
- Crust-breaking mixing action
- Internal and external shaft support
- Geared speed reducer
- Flexible coupling between gearbox and agitator shaft
- Shaft seal-protection arrangement
- Recommended two-piece shaft construction
- Heavy-duty bolted shaft coupling
- Two-stage screw-type impeller
- Bottom-to-top sludge circulation
- Suitable for use with sludge circulation tubes
- Surface flow and spray generation
- Optional dedicated sealing device
- Optional two-piece shaft with fixed joint
- Optional propeller-type impeller
- Two or more impellers can be installed on the shaft
- Shaft and impeller protective linings available in rubber, ebonite and other suitable materials
Benefits
- Provides effective circulation of sludge throughout the digester
- Helps break and prevent surface crust formation
- Reduces sludge settling and stagnant areas
- Promotes movement between the lower and upper sections of the digester
- Surface agitation can support oxygen transfer where required by the treatment process
- Two-piece shaft design simplifies installation and maintenance
- Internal and external supports provide additional shaft stability
- Geared drive provides controlled speed and suitable torque for heavy sludge applications
- Protective lining options improve resistance to aggressive process conditions
- Suitable for continuous operation in demanding treatment environments
Industries Served
Water & Wastewater Treatment: Sludge digestion, sludge circulation and biological treatment processes.
Municipal Sewage Treatment: Mixing and crust breaking in sludge digesters and treatment tanks.
Industrial Wastewater Treatment: Mixing of industrial sludge, mud and process wastewater.
Sludge Treatment & Processing: Circulation, homogenisation and prevention of surface crust formation.
Drilling Industry: Mixing and circulation of drilling mud and related process fluids.
Environmental Processing: Treatment systems requiring continuous circulation of sludge, organic waste and similar materials.
