BIOLOGICAL PLANT

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.

PARTIAL RECYCLING PLANTS

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”).

ZERO LIQUID DISCHARGE (“ZLD”) PLANTS

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.

PLANTS FOR PRIMARY WATER / DRINKING WATER

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.

WELCOME TO EUROPROGETTI

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
E-mail: info@europrogetti-italy.it

Nanofiltration

The Nanofiltration (NF) is a process of separation on membrane with nominal pore diameter of about 1 nanometer (10 Angstroms), operating between UF and RO.
This membrane is not a complete barrier for the dissolved salts. In fact it retains organic molecules with molecular weight greater than 200-400 g/mol, dissolved salts with rejection from 20 to 98%, salts with monovalent anions (for example sodium chloride or calcium chloride) with rejection from 20 to 80%, and salts with divalent anions (ex. magnesium sulphate) with rejection higher than 90-98%.
The filtering process takes place thanks to the application of a difference of pressure that allows the membrane to act as a sieve: substances smaller than the diameter of the pores of the membrane pass with the solvent (permeate) while the larger ones are retained (concentrate).
nanofiltrazione1Since the Nanofiltration membranes are less fine than RO ones, the supply pressure and also the rate of fouling have generally a lower value. Really, the market offers different types of Nanofiltration membranes, which differ in the material type and conformation. If we choose a membrane with low permeability, the difference in osmotic pressure between the two compartments can become high as for a RO system, while with a membrane with high permeability, the osmotic pressure is drastically reduced. Anyway, the efficiency of the system depends strongly also on the chemical-physical characteristics of the water to be treated and the working conditions (pH, temperature).

The applications of this technology include:

  • The removal from surface waters of color and total organic carbon (TOC);
  • The removal of hardness (polyvalent cations) from well water;
  • The overall reduction of total dissolved solids (TDS) and separation of organic compounds from inorganic ones in food applications;
  • The re-use of solutions with high salinity in wastewater treatment.

nanofiltrazione2The last application allows to treat the rejections of an RO plant, obtaining decolorized brines, characterized by salinity between 10 and 30 g/l; therefore, they are suitable for re-use in the dyeing, both for the preparation of new dyeing baths, both in the case of solutions of NaCl for the regeneration of the softening resins.
Thus, this type of process would offer the dual advantage of reusing the electrolytes placed in the dyeing baths and to drastically reduce the amount of dissolved salts in wastewater.  

The system works automatically, modulating the pressure and the flow rate in inlet, using inverters, analogic instruments and a PLC system.
Through the use of instruments such as pressure transmitters, flow meters, Ph-meters and conductivity, it is possible to control strictly the process and optimize the system, improving energetic efficiency.

This technology is used as an integral part of the treatment process in a Partial Recovery Plant, a Zero Liquid Discharge Plant, a Primary Water Plant or a Drinking water Plant.

Iscriviti alla Nostra Newsletter