Filter Press By Shreyans Water Engineers

A filter comprises a set of vertical, juxtaposed recessed plates, presses against each other by hydraulic jacks at one end of the set. The pressure applied to the joint face of each filtering plate must withstand the chamber internal pressure developed by the sludge pumping system.
This vertical plate layout forms watertight filtration chambers allowing easy mechanisation for the discharge of cakes. Filter clothes finely or tightly meshed are applied to the two grooved surfaces in these plates.
Orifices feed the sludge to be filtered under pressure in the filtration chamber. They are usually placed in the center of the plates allowing a proper distribution of flow, right pressure and better drainage of sludge within the chamber. Solids sludge gradually accumulates in the filtration chamber until the final compacted cake is formed. The filtrate is collected at the back of the filtration support and carried away by internal ducts.

Filtration capacity:
The production capacity of a filter press is somewhere between 1.5 and 10 kg of solid per m2 of filtering surface. For every the filter press model the chamber volume and the filtering surface depend on the number of plates in the filer.

In practical terms pressing times are less then four hours.
Filtration time depends on:

- cake thikness
- sludge concentration
- specific resistance
- compressibility coefficient.