Sludge treatment plants

For the optimisation of sludge produced by purification treatment, ITALPLANT provides machines and parts for the compacting and reduction of sludge, thus facilitating external disposal and reducing costs.

Filter Presses

These machines normally consist of a steel frame which supports a series of plates coated in specific filter cloths. The plates are compacted at high pressure by a hydro-pneumatic command piston. Compaction between plates results in the formation of chambers inside of which the water and sludge solution is pumped. The solid solution is captured by cloths inside chambers, until a compact and dehydrated product is obtained, while the liquid part permeates from cloths and is then channelled and discharged beyond the filter press. There are three main types of filter press plants:


  • Manual: plate unit closing and opening functions are automatic, along with plate unit transfer and the emptying of sludge cakes, meaning that these operations must be carried out by an operator.
  • Semi-automatic: head plate opening functions of the plate unit and the closure of the plate unit are carried out by special electric panel commands. Plate unit transfer and sludge cake emptying operations remain automatic.
  • Automatic: all machine functions are automatic: plate unit opening, the shaking of plates and the unloading of sludge cakes, plate unit closure and restart of filtration cycle.


ITALPLANT automatic filter presses are managed by programmable PLCs which are visible during operation and discharge phases, by means of a touch screen panel.

All machines are fitted with operator safety and protection systems and can be fitted with a raising structure for the addition of a sludge collection container under the filter press.

Filtering belts

They are very simple solid-liquid separation systems, applicable for the treatment of small volumes of sludge.

They can be automatically operated and consist of a belt of filtering fabric fitted onto a metal or plastic support frame with a tub underneath, for the collection of filtered liquid. The water/sludge solution deposits by means of gravity onto the filtering belt. As it becomes increasingly blocked, the solution level rises, until a sensor is triggered, commanding the advancement of the belt, thus enabling the unloading of the solid part which is deposited onto the filtering belt, into a special container. Filtered and clarified waters collected in the tank below are relaunched by a pump.

Different types of filtering belt are available, according to the degree of filtration required or solutions to be treated.