ROTATY DRUM SCREEN

Inclined Drum Screens:-

Inclined Drum Screens are either installed directly into the channels, or are supplied as free standing tank packages. 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 and the blinding of the screen surface generates an additional filtering effect so that solids far smaller than the bar spacing or perforation can be retained.
The basket rotates when a preset upstream water level is exceeded. The rotating drum then lifts the screenings and discharges them into the central trough. Screenings removal is achieved 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 inclined closed pipe section. The conveying screw transports, dewaters and compacts the screenings, without any odor issues, and discharges them into them a suitable container or conveying system.

Due to the drum’s shape and 35° inclination the screen area is much greater than that of a vertical screen, which results in a low head loss, high separation efficiency and maximum throughput.

The Screens perform the functions of screenings removal, transport, washing, dewatering and compaction in a single compact unit. An optional bagging unit minimizes odor.
The entire flow enters the screen drum internally and can only exit the drum through its screen area. This prevents plant overflow and guarantees that the screenings are always retained within the screen drum.

The bar spacing can also be reduced to meet more stringent requirements.