ROTAMAT® Rotary Drum Fine Screen Ro 2 / Perforated Plate Screen RPPS
Reliable and well-proven inlet screen for municipal sewage treatment plants and industrial wastewater and process water screening
- fine screen with wedge (Ro 2) or perforated plate (RPPS)
- with integrated screenings press
- with integrated screenings washing
- more than 2,000 installations worldwide
The ROTAMAT® Rotary Drum Fine Screen / Perforated Plate Screen RPPS is completely made of stainless steel and is 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°.
Dependant on the bar spacing (0.5 - 6 mm) or plate perforation (1 - 6 mm) and the drum diameter (up to 3000 mm) any flow rate can be realised.
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 odour nuisance, and discharges them into the customer's container or a subsequent conveying unit.
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Advantages of the ROTAMAT® Rotary Drum Fine Screen
a) 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.
b) Completely made of 2000 stainless steel
The machine is completely made of stainless steel and pickled in an acid bath which eliminates corrosion and thus reduces maintenance.
c) 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.
d) Several functions combined in one system
The ROTAMAT® Screens perform the functions of screenings removal, transport, washing, dewatering and compaction in a single spacesaving unit. An additional bagging unit guarantees operation of the entire system without odour nuisance.
e) Outdoor installation
For frost-proof outdoor installation, the ROTAMAT® Rotary Drum Fine Screen can be supplied with a heating wire and thermal insulation.
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.
g) Low maintenance
No lubrication. Regular checking and visual inspection are sufficient.