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Drinking Water

How we support the process for potabilization

Two solutions are often used for the final treatment of water and its consumption by humans: reverse osmosis membranes and UV disinfection. And these two technologies, in turn, can find an ally in free-fiber cloth filters. The goal: effective removal of suspended solids pre-potable.

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Solutions to support potabilization

Filtri a Tela su Tamburo TF

Drum Filters TF – TF VM

The high filtration rates and small footprint make the Drum Filter the ideal final filtration system for sewage treatment plants, industrial or municipal plants of small capacity. All units are complete with an electrical control panel and can be installed in a concrete tank or supplied complete with a metal containment tank.
Filtri a Tela a Fibra Libera PEC

Disc Filters PEC – PEC VM

With these free-fiber filtration systems, we get to serve medium to large sewage treatment plants with minimal floor space requirements. Not only that. In the PEC and PEC VM disc filters, backwashing with sequentially driven pumps provides the machine with operational continuity in water treatment, consequently avoiding the need to provide a back-up unit.
Filtri a Tela a Fibra Libera PPC

Disc Filters PPC – PPC VM

A solution for high filtration yields and efficient handling and backwashing, with only two pumps for the whole system: the PPC and PPC VM disc filters are for concrete or metal tank, respectively. Versatility and little ancillary work required for operation.

Drinking water: the process after tertiary treatments

We have now reached the tertiary treatment stage in the case of municipal plants (or at least removal of suspended solids down to a few tens of mg/l, if we are talking about industrial plants). One step is still necessary at this point to make the treated water safe for human consumption: it is the potabilization process. These are some of the methods for obtaining potable water.

  • Reverse osmosis: the purification of water using semipermeable membranes. Water is pushed through the membrane against its natural flow, from a more concentrated solution to a less concentrated one (hence the term “reverse”).
  • Final disinfection: this is often done by chlorination or through the use of UV lamps.
  • pH control: this analytical activity is used to ensure that the phosphorus value is within the safe range for consumption.

Constant monitoring from a Deming cycle perspective (circularity of management approach and continuous improvement) is also essential: this is both for the care of people’s health and as a litmus test for any plant maintenance needs.

Acque Potabili EN

Cloth filters: a support for pre-potabilization

We have seen that the potabilization phase requires the use of technologies such as reverse osmosis membranes and ultraviolet lamps: both of these technologies derive a great deal of support from the upstream installation of free-fiber cloth filters.

This is because the depth filtration, enabled by these solutions (instead of the translation of surface filtration), allows a higher yield of pre-potable solids removal. Each of the two downstream solutions achieves considerable advantages.

  • Membranes are safeguarded from fouling. The frequency of chemical washes, which are periodically necessary for the proper operation of this solution but limited by good upstream filtration, is also limited.
  • On the other hand, ultraviolet lamps require the water to be treated to have a very low content of suspended solids both for the sake of operating efficiency and difficult fouling management. Free-fiber cloth filters achieve this: up to 5 mg/l total suspended solids.

Advantages of cloth filters for pre-potabilization

  • Very high suspended solids removal yields due to depth filtration (of TSS < 10 mg/l): this avoids excessive loads for downstream solutions.
  • Reduced electricity use (max 1.9 kW per machine), limited to backwashing of cloths: fewer resources to be used for the plant as a whole.
  • Flexibility in case of overloads, self-adjustment according to input parameters.
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Various industrial water treatment technologies as well as cooling technologies: since 1995 MITA Water Technologies has provided multiple solutions, together with its "sister" company MITA Cooling Technologies, for the complete water management of Vedani Group, which has been active in aluminum processing since 1982.

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