PW Tech Volute Dewatering Press. Represented by Envirep in PA, MD, NJ, DE, VA, WV and DC.

Sludge Dewatering for WWTP Operators

PW Tech Volute Dewatering Press at a Pennsylvania Wastewater Treatment Facility
PW Tech Volute Dewatering Press at a Pennsylvania Wastewater Treatment Facility

Sludge Dewatering for WWTP operators is a very important part of operating a wastewater treatment facility. PW Tech’s Volute Dewatering Press is designed for superior dewatering performance, long-term value, and ease of operation. Sludge is fed into a mixing tank where the polymer is thoroughly mixed in. The sludge then passes through a floc tank where gentle mixing occurs. From there, the sludge overflows into the dewatering drum and is pressed.

Operation and Maintenance

The Volute Dewatering Press is fully automated requiring very little operator attention, other than periodic inspection and polymer drum replacement. Depending on operating conditions, a partial overhaul of the dewatering drums may be required every five to ten years. This two-hour operation is done in the field, with minimal disruption to plant operation.


  • High Cake Solids
  • Low Power Usage
  • Low Installed Cost
  • Low O&M Requirements
  • Small Footprint
  • Fully Automated
  • Low Wash Water Use
  • Low Noise, Low Odor

The enclosed dewatering process operates at speeds of under 10 rpm with minimal wear parts. The result is high cake solids, excellent filtrate, and minimal or no manpower required. Low energy and water use provide savings year over year.

The Volute Press model sizes range from 10 GPM to 300 GPM, with a small footprint, and space for additional drums can be provided for future requirements. The Volute Press is engineered for wastewater treatment plant operators.

Learn more about the PW Tech Volute Dewatering Press

Envirep is a manufacturer’s representative serving the municipal and industrial water and wastewater market in Pennsylvania, New Jersey, Maryland, Delaware, District of Columbia, and Virginia.

We represent manufacturers of equipment used to pump, treat and dispose of wastewater and biosolids. We also represent manufacturers of equipment used to pump, treat, distribute and store potable water.

PW Tech offers free pilot testing for qualified customers. Contact Envirep to learn more about the Volute Dewatering Press.

CLICK HERE here to view our manufacturers’ line card.

by Mike Gillespie, Envirep