It is the most efficient and economical solution to treat wastewater containing biodegradable compounds. This plant is based on the use of bacteria and microorganisms, which can destroy organic and polluting matter if they are kept under specific environmental conditions. CO2, water, mineral salts and inorganic compounds are the final products of the metabolism of organic matter that also produces the growth and development of activated biomass.


In addition to a biological plant, they include a series of advanced treatments that permit to remove specific organic or inorganic pollutants, in order to reuse part of the effluent in other industrial processes (the recycling effluent is used as “process water of process”).


They are plants that do not include any liquid discharge, related neither to service water nor to process one. The ZLD is the result of a total recycling of the water discharged from the industrial process, in conjunction with a total reuse of treated water and a partial recycling of some chemical components contained in it. The final residue is composed of the crystals of dissolved salts and a part of the organic and not biodegradable components.


They are plants designed for the primary water treatment. They include simple solutions such as water softening, iron removal, de-chlorination, etc. and more advanced solutions such as demineralization, production of ultra-pure water and water with very low conductivity.


Europrogetti S.r.l. is a company that, for more than 30 years, offers to customers its expertise in the design, installation and management of plants for treatment, purification and reuse of civil and industrial water sewage. We can offer solutions which allow the recycling of more than 90% of treated water and we also guarantee the lowest running costs thanks to the implementation of the most efficient and advanced technologies in the field.

Customer service

Welcome to Europrogetti S.r.l. Customer Service
For any information, please do not hesitate to contact our staff.
We are available from 8:00 a.m. to 06:00 p.m., from Monday to Friday.


Phone number: +39 049 6988432
Fax number: +39 049 8702422

CHIMICO FISICOThe chemical physical treatments are processes that allow the removal of pollutant substances present in the water, generally poorly biodegradable, using chemical additives. These additives, commonly called "reagents", in particular conditions of pH, react with the pollutants, making them insoluble and favoring their separation by coagulation, precipitation and/or neutralization.

Coagulation: the colloidal particles (organic and inorganic), present in the effluent to be treated, generally have a net negative surface charge, that, due to the action of mutual repulsion between electrical charges of the same sign, maintains the particles in stable suspension within the liquid. Coagulation process destabilizes these surface charges, through the dosage of chemical reagents, in order to allow the aggregation of the colloidal particles in the micro-flakes.

Flocculation: is a process, that, by the dosing of chemical reagents of organic nature, increases the dimension of particles because of collisions between them, facilitating their separation from the water by sedimentation.
Generally, it takes place in tanks equipped with slow agitator with blades, to encourage the collision of particles and simultaneously to preserve the flakes formed. Here, irons or aluminum salts are used; subsequently polyelectrolyte is dosed to better the aggregation of suspended solids in the sludge flocks and promote their sedimentation.

But it is important to consider that the use of chemical reagents involves also a net increase of dissolved constituents (the TDS value is higher of 20-25%), an increase of the operating costs for the purchase of chemicals, an increase of danger in handling/storage of the reagents and a high production of toxic sludge difficult to dispose. In addition, the use of iron/polyelectrolyte and lime is very dangerous for any next treatment with membranes.
As a counterparty, this treatment also implies advantages if used as a system for increasing the efficiency of solids removal in the sedimentation tank, for the removal of phosphorus, heavy metals or inorganic compounds, difficult to separate with other processes.

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