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HUBER Rotary Drum Fine Screen ROTAMAT® Ro2 / RPPS / STAR Reliable and well-proven inlet screen for wastewater and process water screening

  • With integrated screenings press
  • With integrated screenings washing
  • More than 2000 installations worldwide
  • Available with wedge wire ("Ro2"), perforated plate ("RPPS") and folded perforated plate ("STAR") screen basket

Wastewater treatment plants and industrial applications for process and wastewater treatment require mechanical treatment as a first treatment step to remove as much as possible of the floating, settling and suspended material. The aim is to reliabily achieve the maximum separation efficiency under the prevailing hydraulic conditions.

The HUBER Rotary Drum Fine Screen ROTAMAT® operation is based upon a unique system that allows combination of screening, washing, transport, compaction and dewatering in a single unit.

Depending on the screen bar spacing (0.5 - 6 mm) or perforation (1 - 6 mm) and screen size (screen basket diameter of up to 3,000 mm), the throughput can be individually adjusted to specific site requirements. The HUBER Rotary Drum Fine Screen ROTAMAT®  is completely made of stainless steel and acid treated in a pickling bath.

HUBER Rotary Drum Fine Screen ROTAMAT® Ro2
HUBER Rotary Drum Fine Screen ROTAMAT® Ro2
HUBER ROTAMAT® Screen
HUBER ROTAMAT® Screen
Screenings removal at the HUBER Rotary Drum Fine Screen ROTAMAT® Ro2from the drum is supported by a scraper brush and a  spray nozzle bar.
A scraper brush and a spray nozzle bar support the screenings removal from the drum
HUBER Rotary Drum Fine Screen ROTAMAT® with integrated screenings washing IRGA
HUBER Rotary Drum Fine Screen ROTAMAT® with integrated screenings washing IRGA
Waste water flows through the screen basket from the inside to the outside
Waste water flows through the screen basket from the inside to the outside
Tank-mounted HUBER Rotary Drum Fine Screen ROTAMAT®
Tank-mounted HUBER Rotary Drum Fine Screen ROTAMAT®
3 ROTAMAT® STAR units size 1000 with 1.5 mm perforation protecting the downstream membrane plant
3 ROTAMAT® STAR units size 1000 with 1.5 mm perforation protecting the downstream membrane plant
Screen basket of a ROTAMAT® Star screen, acid-treated in a pickling bath and passivated
Screen basket of a ROTAMAT® Star screen, acid-treated in a pickling bath and passivated
HUBER Rotary Drum Fine Screen ROTAMAT® Ro2 with screenings discharge into a lateral container
HUBER Rotary Drum Fine Screen ROTAMAT® Ro2 with screenings discharge into a lateral container
Design sketch: HUBER Rotary Drum Fine Screen ROTAMAT® PRO design, the liquid phase in the trough is pumped off.
HUBER Rotary Drum Fine Screen ROTAMAT® PRO design, the liquid phase in the trough is pumped off.
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Design sketch: HUBER Rotary Drum Fine Screen ROTAMAT® Ro2 / RPPS / STAR
Design sketch: HUBER Rotary Drum Fine Screen ROTAMAT® Ro2 / RPPS / STAR: Compared to one-dimensional wedge wire screens (left picture), the two-dimensional perforated plate screening element of the HUBER Rotary Drum Fine Screen ROTAMAT® RPPS (picture in the middle) achieves a significantly higher separation efficiency. Due to its star-shaped screen drum the HUBER Rotary Drum Fine Screen ROTAMAT® STAR (right picture) has a by about 30% larger screening surface, with the same small nominal diameter and with the result of significantly increased hydraulic throughput capacity.

Design and Function

Design sketch: HUBER Rotary Drum Fine Screen ROTAMAT® Ro2 / RPPS / STAR
Design sketch: HUBER Rotary Drum Fine Screen ROTAMAT® Ro2 / RPPS / STAR: Compared to one-dimensional wedge wire screens (left picture), the two-dimensional perforated plate screening element of the HUBER Rotary Drum Fine Screen ROTAMAT® RPPS (picture in the middle) achieves a significantly higher separation efficiency. Due to its star-shaped screen drum the HUBER Rotary Drum Fine Screen ROTAMAT® STAR (right picture) has a by about 30% larger screening surface, with the same small nominal diameter and with the result of significantly increased hydraulic throughput capacity.

The HUBER Rotary Drum Fine Screen ROTAMAT® operation is based upon a unique system that allows combination of screening, washing, transport, compaction and dewatering in a single unit.

Depending on the screen bar spacing (0.5 - 6 mm) or perforation (1 - 6 mm) and screen size (screen basket diameter of up to 3000 mm), the throughput can be individually adjusted to specific site requirements. The HUBER Rotary Drum Fine Screen ROTAMAT®  is completely made of stainless steel and acid treated in a pickling bath.

HUBER Rotary Drum Fine Screen ROTAMAT® units are either installed directly into the channels, or are supplied as tank-mounted units, with an inclination of 35°. The wastewater flows into the open end of the inclined screen basket and then through the screen. Floating and suspended materials are retained by the screen basket. Blinding of the screen surface generates an additional filtering effect so that solids can be retained that are smaller than the bar spacing or perforation.

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 from the drum is supported by a scraper brush and a spray nozzle bar. A screw conveyor in the trough rotates with the drum and transports the screenings through a closed and inclined pipe. The conveying screw transports, dewaters and compacts the screenings, without any odour nuisance, and discharges them into the customer‘s container or a subsequent conveying unit.

Additional Model Variants and Options

HUBER Rotary Drum Fine Screen ROTAMAT® PRO

The special design of the HUBER Rotary Drum Fine Screen ROTAMAT® PRO series isolates the water level in the trough from the water levels upstream and downstream of the screen. This is achieved with a closed system below the perforated plate of the trough. The liquid phase is removed from the closed system by a suction pump which pumps the flow back to upstream of the machine. The solids are washed, compacted and discharged by a conveying screw. This operation method permits continuous screen operation with a constant water level upstream of the machine. Continuous system operation significantly increases throughput capacity.

The PRO system can even be reliably applied with high downstream water levels and is especially suitable for pump applications. As backup of water into the trough is impossible, screenings discharge via the removal screw can reliably be ensured. It is asy to retrofit into any type of HUBER Rotary Drum Fine Screen ROTAMAT®

HUBER Perforated Plate Screen ROTAMAT® STAR

The HUBER Perforated Plate Screen ROTAMAT® STAR is especially designed for fine apertures and for large wastewater volumes in a gravity line with low headloss. Its design is based on the well-proven ROTAMAT® principle: screenings separation, washing, transport, and compaction in one unit. To improve screen throughput capacity, the RPPS Star screen has a star-shaped screen basket with a zigzag folded surface. The star-shaped folded plate of the HUBER Perforated Plate Screen ROTAMAT® STAR provides an increased free screen surface and an approximately 30 % increase in throughput capacity with the same nominal diameter. The STAR design combines the benefits of maximum free screen surface and very high separation efficiency. This efficiency-improving innovative development permits for optimal and economical system dimensioning, it is space-saving and reduces civil costs. Installation is suitable into existing channels or for tank installation.

HUBER Perforated Plate Screen ROTAMAT® STAR units are preferably used with perforations of 1 / 1.5 / 2 mm for installation on municipal and industrial wastewater treatment plants. The screens are also applied to protect downstream membrane systems by removal of hair and fibres. They can be installed in the mechanical treatment stage or downstream of grit traps. Special PRO design screens are available for applications where an additional increase in throughput capacity is required.

Integrated Screenings Washing System IRGA

To optimise the treatment process an integrated screenings washing system IRGA can be provided and also easy retrofitted. It improves the carbon/nitrogen ratio of the pretreated wastewater. In addition, the IRGA reduces the costs of screenings disposal to an optimal cost/performance ratio.

The HUBER ROTAMAT® principle allows for integration of the screenings washing system directly in the trough and/or the lower end of the rising pipe. As the soluble matter is separated from the inert material, faeces are virtually completely washed out which leads to a significant weight reduction by approx. 50 % and improved operating and hygienic conditions.

The dewatering performance of up to 40 % DS can be increased to more than 45 % DS by adding a high pressure unit (HP) to the integrated screenings washing system IRGA. This combination guarantees the maximum dewatering performance and reduces disposal and operating costs.

Benefits of the HUBER Rotary Drum Fine Screen ROTAMAT® Ro2 / RPPS / STAR

  • Low headloss – High separation efficiency:
    Due to the drum‘s shape and 35° installation the screen area is much larger than that of a vertical or steeply inclined screen, which results in a low headloss, high separation efficiency and maximum throughput.
     
  • No by-passing: 
    The entire flow enters the screen drum through its open front end and can only leave the drum through its screen area. This prevents plant overflow and guarantees that the screenings are always retained within the screen drum.
     
  • Several functions combined in one system: 
    The ROTAMAT® Screens perform the functions of screenings removal, transport, washing, dewatering and compaction in a single space-saving unit. An additional bagging unit guarantees operation of the entire system without odour nuisance.
  • Outdoor installation:
    For frost-proof outdoor installation, the HUBER Rotary Drum Fine Screen ROTAMAT® can be supplied with a heating wire and thermal insulation.
     
  • Completely made of stainless steel: 
    The machine is completely made of stainless steel and pickled in an acid bath which eliminates corrosion and thus reduces maintenance.
     
  • Retrofitting:
    The design of the ROTAMAT® Screens allows for later modification so that the systems can be adapted to changing requirements. The heating and/or integrated screenings washing can be retrofitted. The bar spacing can also be reduced to meet more stringent requirements.
     
  • Low maintenance:
    No lubrication. Regular checking and visual inspection are sufficient.

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Case Studies

HUBER Solutions in Operation

Fully assembled ROTAMAT® Ro2 with screen basket cover.
2024-03-07

The HUBER ROTAMAT® family – proven technology for large projects

The HUBER ROTAMAT® family is the foundation on which HUBER SE started its development in wastewater technology. On this...

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2023-12-18 Salzburg, Austria

Two new HUBER Rotary Drum Fine Screens ROTAMAT® Ro2 2600 XL for Salzburg-Siggerwiesen WWTP

The Salzburg-Siggerwiesen wastewater treatment plant has received two new HUBER Rotary Drum Fine Screens ROTAMAT® Ro2...

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2018-10-16 Star, Idaho, USA

HUBER’s Perforated Plate Fine Screen Brings STAR Power to Star Water and Sewer District

Consultants and engineers pointed the district to HUBER and its ROTAMAT® STAR fine screen as a replacement that would...

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2017-11-13 Morgantown, West Virginia, USA

Reliable protection of membrane plants with HUBER Perforated Plate Screen ROTAMAT® STAR liquid

HUBER fine screening plants can look back on a very long tradition in the USA. Constant further development, offers our...

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2013-07-01 Bitterfeld Wolfen, Sachsen-Anhalt, Germany

Further development of the well-proven ROTAMAT® screen concept: new Pro line

The municipal wastewater of the Bitterfeld-Wolfen sewage treatment plant is prescreened in our ROTAMAT® Membrane Screen...

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2012-04-24 Berching, Germany

Further developed ROTAMAT® Rotary Drum Fine Screen with increased hydraulic capacity: ROTAMAT® Perforated Plate Screen RPPS-Star

On the basis of the worldwide known and well-proven system of HUBER ROTAMAT® fine screens with wedge wire screen basket...

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2011-10-25 Gessen, Germany

Mechanical wastewater pre-treatment for membrane bioreactors

When membrane technology solutions appeared on the market for the treatment of municipal wastewater, the requirements on...

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