Reverse osmosis also guarantees low energy consumptions and reasonable expenditure of chemical products. Furthermore, the waste water parameters fall within the sewage limits, therefore resizing more and more the problem of disposal of eluates (for example, for softeners and ion exchange resin demineralization units).

Reverse Osmosis is the process that occurs when a saline solution comes into contact with a membrane permeable to water (and not to dissolved salts) at a pressure exceeding the osmotic pressure of the solution itself. The passage from water, poor in salts (permeate), occurs through the membrane, wherereas outside of the membrane waste water rich in salts (concentrate) is obtained.

Our manufacturing of reverse osmosis units for water desalinization covers a wide range of different solutions, according to:

• the type of water to be treated, tap, brackish or sea water
• for specific uses, drinking water, water for irrigation or industrial use
• the production capacity from 200 ltr/h to 25 m3/h of permeate, for brackish or tap water and from 10 to 2000 m³/g per sea water

NOVACQUE also carries on turn-key plants for sea water desalinization based on specific projects, up to di 10.000-15.000 m³/d.
In sea water desalinization of medium to large capacities, NOVACQUE uses turbines of energetic recovery and pressure exchangers in order to reduce energetic consumption up to 3 kWh/m3 of water produced.

Uses

• Brackish water desalinization to obtain drinking, irrigation or industrial water
• Well or tap water demineralization for industrial use (thermal power stations, food, pharmaceutical, electronics industry etc.)
• Sea water desalinisation obtaine drinking water or water for industrial use

It uses the properties of specific membranes characterized by a very high saline rejection (semi-permeable membranes) which, powered by a more or less brackish water in specific conditions of pressure (exceeding the osmotic pressure of the water to be treated), allows the passing of large amount of water with a high salt content (permeate) to pass through, while the most of the salts contained are withheld in the external fluid of the membranes (concentrate) and are therefore discharged.

A modest consumption of chemical products is often required, suggested to insure a long life of the membranes.

Reverse osmosis allows an economic savings compared to the other kinds of water treatments. It represents, also, a clean technology compared with ion exchange resins filters which also create problems for the disposal-treatment of the regeneration of the eluates).

NOVACQUE produces standardizes plants and guarantees optimization of the quality of the materials used and the quality of the water produced.

NOVACQUE develops and carries on turn-key plants based on specific projects for potentials up to 10.000 m³/days

Uses

• Demineralization of well or tap water for industrial use
• Well water potabilization
• Brackish water desalinization to create drinking, irrigation or industrial water
• Sea water desalinization-potabilization

Resin softening does not substantially modify the saline content but the saline composition.

The hardness of water is responsible for the formation of encrustation on piping or on the equipment crossed by the water (heat exchangers, boilers, cooling towers etc.).

The IS softeners work independently. The regeneration is allowed by a turbine calibrated for a specific cyclic capacity according to the hardness of the water to be treated and to other parameters or, if requested, by a timer.

When the resin can no longer exchange Sodium salts with Calcium salts, it means that its exchange capacity runs out. The resin is regenerated by an unsaturated solution (brine) of sodium chloride. Depending on the regeneration level provided for (grams of NaCl for each litre of resin) the resin has different exchange capacities: higher is the regeneration level, higher will be the exchange capacity. But the increase of the exchange capacity isn’t directly proportional to the increase of the chosen regenerative level.

The ISD softeners work pairs (Duplex) with exchange operation, while one softener is working the other one is being regenerated or is on standby. They are kinds of equipment that guarantee reliability, safety, duration and most importantly their simplicity and proven application.

NOTE: Sometimes it may be best to carry out softening using the reverse osmosis process.

Uses

• Water softening
• Softening of well water
• In industrial fields (laundries, supply to steam generators, supply to cooling towers etc)
• In civil fields (conditioning, powering of large condominium boilers supply)
• In hospital fields (power to the thermal power station supply etc.)