FIDIA Engineering proposes physical chemical wastewater treatment plants for removal of poorly biodegradable pollutants, such as phosphate nutrient, surfactants, phenols, etc..
The treatment is accomplished by the addition of specific additives, in particular conditions of pH, which react with the pollutants making them insoluble and favoring the removal by coagulation, precipitation or neutralization.
As for traditional biological systems we set ourselves the goal of providing optimal solutions in terms of technical and operational profile, ensuring the achievement of the guarantees of the process with low investment.
The study and design of chemical-physical systems most suitable, are selected case by case depending on the characteristics of the water to be treated. A classical physical-chemical plant consists in the following stages of treatment: insolubilization of metal salts in acid or basic environment, flocculation, coagulation, sedimentation / decantation, neutralization, final filtration, dehydration and sludge disposal.
In the first phase salts of metals present in dissolved form become insoluble, turning them into hydroxides. The subsequent dosage of reagents promotes the flocculation of suspended particles favoring the formation of flocs, and the purpose of obtaining a better sedimentation is possible to add a polyelectrolyte, which promotes clotting. The final section of separation has the purpose of waters clarification, by sludge separation, which is deposited on the bottom of the decanter, from purified waters.
These are sent to a sub-fund of neutralization and to the aging final treatment with tertiary treatment, while collected sludge are sent to a dedicated treatment.