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Germany, Austria, Switzerland


Rotary Drum Screen

The separation of very fine solid particles from water and wastewater using state-of-the-art micro screening technology.

The Aqseptence Group offers you versatile micro screening drum systems with proven results as being both effective and economical in a wide range of applications.

Unique Features

  • High flow rate and low headloss due to optimal hydraulic characteristics using curved screen panels
  • Integrated emergency overflow
  • Blades installed in the screen baskets prevent screenings from falling back into the raw water
  • Direct drive by means of a gear wheel


For use in municipal wastewater technology, the microscreen drum system (CarbonExtract®) represents an effective and very economical alternative to conventional screening and primary clarification systems. The heart of the Noggerath® Drum Screens RSH-M / RSH-MG is formed by a rotating drum consisting of sieve baskets mounted to each other. The raw water passes through the drum from the inside to the outside. In the process, the dirt particles adhere to the screen basket surface. As a result of the rotational movement of the drum, the filter cloth is cleaned by a spraying device, which considerably improves the filtration performance. Depending on the product version, the cleaning water and screenings are discharged from the drum via the internal dirty water flume, a screenings press or a spiral conveyor. Installation can be in a concrete chamber or in a steel or plastic tank.

Technical data

The raw water passes through the screen drum cage from the inside to the outside, leaving solid particles on theinner surface of the screen. The resulting buildup on the screen surface blinds the mesh openings causing a pressure loss across the screen. When a defined difference is detected between the upstream and downstream water the drum begins to rotate. During the rotating movement, the screen mesh is backwashed with an external sprayingdevice. This spraying device is located in the apex of the micro screening machine. The cleaning of the screen panels improves the filtration performance and reduces the water level differential, resulting in the drum stopping its rotation.
The cleaning water and screenings are directed out of the drum via the internal launder channel, a screenings press or a spiral conveyor.

Outapi, Namibia

Upgrading of a wastewater pond facility in Namibia; Water reuse in agriculture

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