What are the common methods for sludge dehydration in sewage treatment?

There are three commonly used methods for sludge dehydration:

Centrifugal sludge dehydration equipment: consists of a conveyor and a screw conveyor with a hollow rotating shaft. The sludge is fed in by the hollow rotating shaft. The drum is immediately thrown into the drum cavity under the centrifugal force generated by high-speed rotation. Due to the different specific gravity, solid-liquid separation occurs. However, the sludge is pushed by the screw conveyor and transported to the conical end outlet of the drum, where it is continuously discharged; the liquid part is also continuously discharged to the outside of the drum by gravity overflow.

Centrifugal sludge dehydration - high-speed centrifuge

Spiral sludge dehydration equipment: Screw press sludge dehydration equipment has a screw made of a filter in the barrel. The diameter of the screw body gradually becomes thicker from the inlet to the outlet of the dewatering outlet. As the volume between the screw blades gradually changes and shrinks, the sludge is gradually compressed and becomes smaller. Through the principle of compression, the solid phase and liquid phase in the sludge are separated. The liquid is discharged through the mesh of the filter.

Screw stacking sludge dehydration equipment - screw stacking machine

Plate and frame sludge dehydration equipment: In a closed state, the sludge driven in by a high-pressure pump passes through the plate and frame Squeeze, so that the water in the sludge is discharged through the filter cloth, thereby achieving the purpose of dehydration.

Plate and frame sludge dewatering system-filter press