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Sludge Dewatering Belt Filter Press

  • Product info
  • Technical

Brief introduction


LZZG Sludge Dewatering Belt Filter Press is a widely applicable product for  efficient dewatering of sludge from municipal, industrial, mining and aggregaes wastewater treatment. Especially suitable for dewatering of tailings mud such as iron ore, copper ore, lead-zinc ore, fluorite ore, bauxite or rare earth ore; Dewatering operations such as ore dressing wastewater, sand washing mud, and wash plant sludge.


The slurry is sandwiched between two tensioned porous belts, by passing those belts through a serpentine of decreasing diameter rollers. Water is then removed from the slurry and a solid material is produced.

belt filter working

Working principle

(1) Thickener dehydration: chemical pretreatment stage

The belt filter press has higher requirements for flocculation effect. This machine uses a unique dosing mixer to achieve rapid flocculation and achieve the best flocculation effect.

(2) Gravity dehydration: gravity concentration dehydration stage

The sludge is evenly fed into the mesh belt through the cloth bucket. The sludge runs forward with the filter belt. The free water flows into the water tank through the filter belt under the action of its own weight. The main function is to remove the free water in the sludge, so that the fluidity of the sludge is reduced and ready for further extrusion.

(3) Low/medium pressure dewatering: wedge preloading dewatering stage

After gravity dewatering, it is still difficult to meet the sludge flowability requirements of the press dewatering section. After this stage of slight extrusion dewatering, the sludge is smoothly pressed and dewatered.

(4) High pressure dehydration: the depressurization stage of the clamp press

The filter cake is repeatedly pressed and sheared around the press roll by the upper and lower filter belts. A large amount of capillary action water is removed to gradually reduce the moisture of the filter cake.



  1. An easily adjustable and variable wedge compression zone that maximizes process rate and performance.
  2. Suitable for all types of organic sludge and inorganic mud, municipal WWTP sludge, pulp &paper sludge, water plant sludge.
  3. The belt press is constructed with a stainless steel structure and rollers, durable for more than 10 years .
  4. Low power is needed to run the belt filter press. With long term value and ease of operation.



Belt Filter Press Application

Various types of industrial wastewater sludge, such as sand-making mud, washed sand mud, mine tailings, piling mud, river silt, etc are produced. They are pumped to the deep cone thickener, the flocculant is added to the tank, and the concentration of the sludge in the thickener is increased by 60%-70% under flocculation and gravity precipitation. Then sent to the belt filter press, under the action of a gravity zone, a wedge zone, and a pressure zone , the mud cake with water content of less than 20% is obtained and the overflow clean water  for re-processing.


Belt Filter Press in Washing PlantLZZG Belt Filter Press for Water Plant Sludge

Model DY2012 DY2512 DY3012 DY3512
Bandwidth(mm) 2000 2500 3000 3500
Length(mm) 12000 12000 12000 12000
Capacity(t) 10 15 20 25
Power(kw) 4+0.75 5.5+0.75 7.5+1.5 7.5+1.5
Size(mm) 12000*2000*2500 12000*3100*2500 12000*3600*2500 12000*4100*2500


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