Archimedean screw rotors complete installation

3 pcs. Archimedean hydrodynamic screw rotors manufactured for a wastewater treatment plant. This type of screw rotor is the classical understanding of the screw auger invented by Archimedes in the Ancient time. The screw auger is designed to lift water from one level to a higher level. This project is an example of a renovation project where 3 warn out Archimedian hydrodynamic screw rotors have been replaced by new ones together with a renovation of the concrete around them.

What is the advantages to use an Archimedean screw rotor?

1. The hydrodynamic screw rotor has only one moving part
2. It can lift a large amount of water
3. It is not sensitive to foreign elements like tree branches, sand and other parts going out with sludge water

The design of this type of screw rotor is very well described in the book “Wasser Föderschnecken – Plannung, Bau und Betrieb von Wasserhebeanlagen” written by Gerhard Nagel and Karl-August Radlik. The book can be used by all engineers working with this type of installation for waste watertreatment plants. In BEMA we can help by manufacturing the screw rotor. In this project BEMA has undertaken a complete installation by:

• Removal of the old warn out screw rotors
• Renovation of the bottom bearings
• Installation of new screw rotors
• Renovation of the concrete beneath the screw rotors
• Installation of new gear boxes
• Installation of a new lubricating system for the bottom bearins

The job has been performed in 10 weeks from the received order. See similar screw rotor here

FAQ: Archimedean Screw Rotors – Complete Installation

1. What is an Archimedean screw rotor used for?

An Archimedean screw rotor is designed to lift water from a lower level to a higher level. This classical technology, originating from ancient engineering, is still widely used in wastewater treatment plants due to its ability to move large water volumes efficiently and reliably.

2. Why choose an Archimedean screw rotor for wastewater applications?

The hydrodynamic screw rotor has only one moving part, making it extremely robust and low‑maintenance. It is also highly tolerant of foreign objects such as branches, sand, and debris commonly found in sludge water, ensuring stable operation even under demanding conditions.

3. What did BEMA deliver in this complete installation project?

BEMA handled the full renovation and replacement process: removing worn‑out rotors, renovating bottom bearings, installing new screw rotors and gearboxes, repairing concrete structures, and implementing a new lubrication system. The entire job was completed within 10 weeks from order receipt.

4. How is the design of Archimedean screw rotors documented?

The design principles are thoroughly described in the reference book “Wasser Föderschnecken – Planung, Bau und Betrieb von Wasserhebeanlagen” by Gerhard Nagel and Karl‑August Radlik, which is widely used by engineers working with water‑lifting installations.

5. Can BEMA support similar renovation or replacement projects?

Yes. BEMA manufactures new hydrodynamic screw rotors and provides complete installation services, including mechanical renovation, component replacement, and system upgrades tailored to wastewater treatment facilities.