High-efficiency rotary screen

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CST Wastewater Solutions has introduced its Rotary Drum Screen for high efficiency screening of industrial and municipal wastewaters.

It features an all-stainless construction including base frame and is fully enclosed for OH&S odour and aerosol control.

Advantages of the screen, enhancing durability, hygiene and serviceability, include:
• non-lubricated chains and non-metallic drive sprockets
• upgraded running wheel design
• no mechanical parts  in contact with screened solids
• corrosion resistant
• designed to handle high fat and grease loadings
• self-cleaning
• optional wedgewire slots or perforated holes screening

The new Rotary Drum Screen has a low investment cost, as well as low operational and maintenance costs. Custom-designed machines are also offered.

Typical industries to use the Rotary Drum Screen include general food processing (vegetables, fruit, coffee, starch processing), beverages (beer, wine, juice, soft drinks), slaughterhouses and abattoirs, tanneries, pulp and paper mills, textile plants, plastic manufacturers and many more industries.

Municipal treatment plants also use the screens for fine screening of raw sewage, pre MBR (membrane bioreactor) screening, and sludge thickening.

The full stainless screen design accommodates either slot or hole configurations, depending on the application.

The internally fed Rotary Drum Screen can use wedgewire or perforated hole drums. Wastewater passes into the internal feed tank before overflowing the weir onto the screen face of the drum.

Solids are collected on the screen face, while the screened water passes through the screen face under gravity. Collected solids are discharged via the screen drum mouth.

The internal feed tank controls inlet velocities and distributes the flow evenly onto the screen face.