Centerfeed Fine Screen Dramatically Increases Throughput

Reliable and well-proven inlet screen for municipal sewage treatment plants and industrial wastewater and process water screening

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Centerfeed Fine Screen Dramatically Increases Throughput

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The Rotamat screen from Huber Technology has been a popular choice for protecting debris-sensitive technologies downstream such as MBRs. By constantly responding to the needs of the industry, Huber Technology has developed the RPPS Star Pro series centerfeed fine screen. When combined, the Star and Pro options for the RPPS increase capacity and allow for even finer perforations, meaning increased screenings removal in a tighter footprint.

Model variations:

Ro2: Wedge wire screen ≥ 0.5 mm

  • Depending on the screen bar spacing (0.5 - 6 mm) and screen size (screen basket diameter of up to 3,000 mm), the throughput can be individually adjusted to specific site requirements.

RPPS: Perforated plate screen basket ≥ 1,5 mm

  • Compared to one-dimensional wedge wire screens, the two-dimensional screening element of the Rotary Drum Fine Screen Rotamat RPPS achieves a significantly higher separation efficiency.

STAR: Folded perforated plate screen basket ≥ 1,0 mm

  • The star-shaped screen basket with a zigzag folded surface of the Perforated Plate Screen Rotamat Star provides an increased free screen surface and a roughly 30 percent increase in throughput capacity with the same nominal diameter. RPPS-Star units are preferably used with fine perforations of 1/1.5/2 mm for installation on municipal and industrial wastewater treatment plants.

PRO-Series option

  • The special design of the RPPS-PRO series isolates the water level in the trough from the water levels upstream and downstream of the screen. This operation method permits continuous screen operation with a constant water level upstream of the machine and significantly increases throughput capacity.

ROTAMAT Rotary Drum Fine Screens are completely made of stainless steel and are acid treated in a pickling bath. They are either installed directly into channels or are supplied as tank-mounted units, with an inclination of 35 degrees.

Dependent on the bar spacing (0.5 - 6 mm) or plate perforation (1 - 6 mm) and the drum diameter (up to 3,000 mm), any flow rate can be realized.

The wastewater flows into and through the open end of the inclined screen basket with the floating and suspended materials being retained by the screen basket. Blinding of the screen surface generates an additional filtering effect so that suspended materials can be retained that are smaller than the bar or perforation of the screen basket. The basket starts to rotate when a certain upstream water level is exceeded due to screen surface blinding.

The rotating screen drum lifts the screenings and drops them into the centrally arranged trough. Screenings removal is supported by a scraper brush and spray bar. A screw conveyor in the trough rotates and transports the screenings through an inclined pipe.

The conveying screw transports, dewaters and compacts the screenings, without odor nuisance, and discharges them into the customer's container or a subsequent conveying unit.

Huber Technology has installed more than 2,000 units worldwide.

About Huber Technology
Huber Technology provides state-of-the-art equipment for municipal and industrial water and wastewater treatment. Our main focus is liquid/solid separation in general and headworks equipment in particular. We offer a comprehensive line of stainless steel equipment. For more information, visit


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