④ Scum Drum Screen.

 

KOREA SLOT Scum Drum Screen is another multi-purpose filter assembly that slotted cylindrical wedge wire drum rotates on two pillow block bearings. The rotary drum is driven by a motor fitted to a shaft-mounted gearbox. This type of screen is fed externally and drained via the outer screen surface.

Raw influent enters a head-box which distributes the flow evenly across the full length of the rear, upper external surface of the rotating drum. As water passes through the screen, solids are retained on the upper outside of the screen drum and are carried to the front of the screen where they are removed by a fixed doctor blade.

Scum Drum Screen has three methods of maintaining clean screen openings:

1. The doctor blade scrapes the solids from the face of the screen surface.

2. The screened water cascades down inside the drum and falls through the            bottom, creating a vigorous backwash action.

3. Automatic and cyclic internal water sprays of screen drum.

KOREA SLOT Scum Drum Screen is capable of solid filtration with various slot openings range from 50microns (0.05mm) to 20mm. It is ideally suited for effluents containing high oil or grease loadings.