Easy and efficient sludge thickening with ANDRITZ PowerDrum drum thickener (PDR)

With more than 30 years of experience in the development and manufacturing of drum thickeners, ANDRITZ SEPARATION has acquired unmatched expertise in this technology. The PowerDrum (PDR) drum thickener for sludge thickening is considered to be an easy and efficient sludge thickening solution prior to the dewatering process and can deal with biological sludge throughputs ranging from 15 to 180 m³/hr. With its simple design and small footprint, the PowerDrum (PDR) drum thickener for sludge thickening is easy to install and requires little supervision and maintenance.

PowerDrum (PDR) drum thickener for sludge thickening prior to dewatering process

PowerDrum (PDR) drum thickener for sludge thickening with quick access to spray ramp

The PowerDrum (PDR) drum thickeners for sludge thickening ensure dynamic thickening by rotating sludge continuously. They are specially designed for pre-digestion treatment (for primary, secondary, or tertiary sludge) or when land liquid spreading is planned. The PowerDrum (PDR) drum thickener for sludge thickening may also be used to lower the hydraulic capacity of the dewatering equipment installed in the downstream process. The sludge is conveyed inside the drum due to the drum inclination, as well as the combined action of the drum’s rotating movement and its internal design. This drum has the special feature of having various filtration stages zone-by-zone along its length, with a polyester cloth to achieve better separation efficiency.

Venturi mixer

Upstream in the process, the Venturi mixer ensures efficient inline flocculation, without additional power consumption.

Small footprint
Low energy consumption
Easy to install
Lower polymer consumption

Operator-friendly design

Specific inlet and outlets hatches for process control (flocculation and infeed/outlet dryness)
Sampling point with manual valve for filtrate quality control
Sampling point (with manual half-pipe sampling collector) for thickened sludge checks
Specific washing ramp rotary handle with specific hatches (for quick access and operator control without stopping the machine). A safety switch stops the water supply when required
Specific automatic flushing point for tank cleaning (avoiding manual maintenance, process issues, and clogging)
Hatches on the main cover allow quick and easy access to perform drum washing or periodical checks

Benefits

Durable technology (all stainless steel design) for very low wear, and plastic bearing housing to avoid corrosion
Reduction in sludge volume (up to 90%) before storage or shipment
Intermittent or continuous self-cleaning thanks to a stainless steel spray bar with PVDF nozzles
Low power consumption and, consequently, low operating costs
Entirely closed system to avoid odour pollution, with deaeration flange
Low space requirement
Easy maintenance and fast belt removal
Easy to install (pre-wired); a skid design is available, making the equipment easier to install and move if necessary
Efficient and reliable design
Dedicated cover for washing ramp access, with automatic rotation of the ramp to give direct access to nozzles for inspection or cleaning
Additional hatches for drum inspection and cleaning

Range

Model	Ø (mm)	L (mm)	W (mm)	H (mm)	Motor (kW)	Washwater flow (m³/hr)	Washwater pressure (barg)
PDR600L	600	3,300	800	1,350	0.37	6	8 minimum
PDR900M	900	2,980	1,179	1,733	1.10	4	8 minimum
PDR900L	900	3,950	1,179	1,733	1.50	6	8 minimum
PDR900XL	900	4,950	1,179	1,733	1.50	8	8 minimum
TwinPDR900XL	900	7,300	2,170	2,228	2 x 1.50	16	8 minimum
PDR1200	1,200	5,665	1,650	2,260	1.50	13.5	8 minimum

Applications

Environment

Thickening of municipal or industrial wastewater sludge
Thickening of sludge for landfill or other forms of disposal, suitable for small wastewater treatment plants
Thickening before anaerobic digestion
Thickening before a belt press or centrifuge — a combined system improves the mass load capacity of the dewatering machine
Thickening before a filter press