PERFODRUM Screen Applications
- Municipal and Industrial Waste Water Treatment
- DRD Rotary Drum Screw-Screens cater to higher flow rates than
the DSS Screw-Screens screens: furthermore, higher separation efficiencies
can be anticipated at peak flows.
The rotary drum design ensures separated solids are retained
and cannot bypass the screen even at peak flow loading.
- MBR (Membrane) Reactor Pre-Treatment
- DRD perforated-hole drum screens impart high separation
efficiencies using either a 1 or 2 mm mesh respectively for
hollow fibre or flat plate membrane processes.
- Improved performance efficiencies of MBR operation can also be applied by utilizing 0.5 or 1 mm wedge-wire mesh for
enhanced removal of fibre or hair and the possible tangling hindrances this may cause. High separation efficiencies and
screenings capture within the enclosed drum ensures solids are retained and cannot pass through or overflow.
- Storm Overflow Treatment
- DRD Drum Screens can be applied as combined storm overflow (CSO) screens using 6 mm perforated hole mesh for
flows up to 2,000 l/s. Increased duties, 4,000 l/s, 6,000 l/s, 8,000 l/s can be handled where multi-duty units are used.
To suit various requirements, DRD Drum Screens can be
supplied with or without wash and compaction. This will allow
- screenings removal and compaction at the CSO station,
- screenings removal and compaction at the CSO station
with return of washed faecal and other semi-solid matter
only to the downstream sewer or,
- return of all screenings, faecal and other semi-solid matter
to the downstream sewer
Applications include combined sewer systems in addition to
municipal and industrial waste water treatment works - either as
CSO duty only, or as a single integrated CSO and preliminary
treatment screen for all effluents entering the works.
All flows entering the screen drum become entirely enclosed
which ensures separated solids are retained within the screen
and cannot overflow even at peak flow loading.
Improved storm overflow solids removal efficiencies can be gained with consequential reductions in BOD and COD by
utilizing 0.5 or 1 mm wedge-wire mesh.
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