Chemical-physical treatment for the waste water of the ceramic production process able to purify and recover the water in the production cycle.

Water clarification, that provide the water with the proper features, is very complex but, to simplify and put it shortly, we can identify three important steps:

1. Flocculation process

2. Decanting process

3. Filter-pressing process

The process consists mainly in the precipitation of non-settling suspended substances (and, if present in solution, also sedimentable substances) that during this process gradually form larger and havier aggregates (FLOCCULATION) to form a precipitate that sinks to the bottom of the container or tank used in the process (DECANTATION).

Water clarification allows the precipitation process of non-settling colloidal suspended solids that are difficult to remove by means of a simple physical treatment because of their very slow sedimentation that would require large size settlers or a longer stay inside the settler. With the water clarification, it is possible to separate, by a precipitation process, almost all the particles that cause the turbidity of the water.

The third and final step (FILTER-PRESSING) involves the removal of the sedimented material through a complex technological system that purifies the water from the accumulated residues.