Screw dewatering filter - press

Comparing with the other devices (belt filter press , centrifugal machine), Techange screw dewatering filter – press has many advantages such as energy-saving, capable of working 24/7, fully automation ,lower polymer consumption , achieve a dry matter content of 15%-70%, minimal flush water consumption, minimal maintenance & operation cost , minimal noise,  etc.  Suitable for any type of sludge, for example, sludge from municipal, beverage, slaughter breeding, printing and dyeing, chemical, oil, paper making, pharmaceutical etc.

Working Principle:

Sludge will be transported to the dewatering department after being thickened in the thickening department. In the advancing process, great pressure has been produced because of the gradually decreasing filter spacing and screw distance, and the back platen clogging. Then the volume decreases continuously , and the purpose of fully dewatering will be achieved.

Benefits of Screw dewatering filter - press:

  • Low energy consumption
  • Simple installation and operation
  • 0.5-2%sludge at inlet,15-20%sludge at outlet
  • Low noise and vibration levels
  • Wide use applications
  • Automated mode
  • Affordable spare parts
  • Low transport weight
  • Low polymer consumption
  • Capable for working 24 hours

Process flow diagram:

Technical specification:

Pre-thickening screw sludge dehydrator

The equipment is widely used for lower consistency sewage wastewater and is composed of thickening part& dehydration part, The consistency range can be from 2500mg/L to 20000mg/L, thus the investment can be reduced a lot. It’s a professional integrated thickening & dewatering sludge dehydrator.

Screw sludge thickener

The sludge can be condensed rapidly and continuously in the secondary sedimentation tank, meanwhile, after condensed and separated, the sludge concentration can be adjusted between 90% and 96% stably. it’s a special thickener equipment.


It is the pre-treat device of sludge deep dewatering ,also as the auxiliary equipment of ultra high pressure elastic presser, membrane filter presser.

Instead of condensed tank, work as the pre-treat device of the sludge dewatering system.

Sludge dewatering in the municipal & industrial wastewater treatment system.

Solid and liquid separation in the municipal & industrial wastewater treatment system.

Other wastewater treatment applications in the municipal & industrial wastewater treatment system.

Parameter table

Mobile sludge dewatering unit

Mobile sludge dewatering unit is developed by Techange, which is a movable vehicle type sludge dewatering complete system, the unit is easy to move, it can be of service for different sewage treatment factory in different places. The unit is mainly composed of volute screw dehydrator, integrated polymer dosing system, polymer feed pump, sludge pump and transportation truck.

Technical Feature:

  • It can be of service for small scale sewage treatment factories.
  • Completed enclosure, little odor
  • Low noise, low power consumption, compact design
  • Less wearing parts, easy to operate & maintain
  • Fully-automatic control ,continuous operation, easy to operate & maintain
  • Easy movement, convenient