- Thickening of municipal or industrial waste water sludge
- Thickening before anaerobic digestion
- Dewatering with PowerPress (combined system)
- Thickening before filter press, decanter, and screw press
The PowerDrain gravity belt thickener is a highly efficient and economical solution for sludge thickening. Specially designed ploughs as well as the very large open area under the belt optimize the draining effect.
Engineered and supplied by ANDRITZ SEPARATION for decades, the PowerDrain is a heavy-duty unit that operates in a size range of 5-20 m² drainage area. The large open area, special feeder, and adjustable ploughs optimize the drainage effect. ANDRITZ SEPARATION has the expertise and experience to customize the PowerDrain and its auxiliaries for any sludge treatment application.
After the sludge has been flocculated in the feed pipe, it enters the gravity zone where most of the liquids and solids are separated. A spreader plate ensures uniform distribution over the working width of the belt. PowerDrain units can be equipped with two to four rows of ploughs, which compact, rearrange, and deflect the sludge. The thickened sludge is then scraped off the belt, while the filtrate is discharged on the drive side and could be reused for washing. A washing chamber with flat jet nozzles cleans the belt.
Thanks to a spray bar with a self-cleaning device, wash water is collected separately. The thickened sludge is now ready to be processed using dewatering equipment.