The great oxidizing properties of ozone, which has been used for long as disinfectant, are renowned.

IN THE PICTURE:   Formula of the ozone molecule.

Ozone has shown to have a greater disinfecting effect than chlorine and chlorine by-products, to act on a wider range of organisms and, above all, not to generate noxious by-products or give undesired smells and flavours to food.

Despite all this, the food industry has always preferred chlorine to ozone because chlorine had considerably lower capital and operating costs.
However, in the last few years, there has been a turnaround by all parties involved. Institutions are establishing increasingly restrictive limits to chlorine derivatives and by-products in drinking water, while, following market requests, food industries pay great attention to supply fresh, organoleptically health and qualitatively excellent products.

Upon request, Water Team can provide its customers with a specific study to permanently abandon chlorine as disinfectant in their production process in favour of ozone. An investment that will be certainly considered and appreciated by the market.

IN THE PICTURE:   Ozone production plant with contact tank.

 

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Once used in industrial or civil processes, water contains additional substances that are noxious if released in the environment. Waste water must be therefore purified through appropriate purification plants.

The various plants are designed and built according to the load of pollutants to be disposed of. Purification processes therefore vary a lot and depend on the technology applied, the selected process, the safety margins to be achieved, the investments available, and the operating costs to be borne.

This overview clearly shows the vastness of the topics to be dealt with and, thus, the great number of possible solutions.

Purification processes are generally divided as follows:

- Physical
- Chemical
- Biological aerobi
- Biological anaerobic
- A combination of the previous types

Below is the list of the various stages that can be generally found in purification plants:

Sedimentation
Chemical coagulation;
Flotation;
Screening
Oxidation
Activated sludge aerobic process

Thickening stage
Digester
Clariflocculation
Sludge dehydration
Waste water disinfection

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Food production processes and private and public users require drinking water supply sources.

The water distributed by waterworks accounts for most of the drinking water consumed, even though the supplies from superficial (catch basins, rivers and lakes) and underground (water-bearing layers) reserves are not negligible.
 Drinking water must satisfy many organoleptic requirements in order to be defined as such. The chemical, physical and qualitative characteristics of drinking water are defined by several regional, national and EU laws.

The purification process aims at acting on these parameters, modifying those that do not comply with the current regulations in force but also taking all necessary measures to
preserve the quality and salubriousness of drinking water up to final user.
 Water Team is able to analyse the water to be treated and identify the non-complying parameters in order to later suggest the most appropriate treatment process.

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The term "water pretreatment" indicates all technologies able to purify water of suspended solids, dissolved salts, absorbed gases and undesired chemical compounds through processes carried out in specific plants applying mechanical, physical or chemical-physical principles (boiler water, cooling tower water).

 
Water pretreatment is required for a wide range of water use conditions in various industrial usages.
The most common pretreatment processes are the following:
 
 Degassing;
 Sedimentation;
 Filtration;
 Removal of iron and manganese from water;
 Adsorption;
 Absorption;
 Denitrification;
 Ion exchange;
 Osmosis;
 Disinfection;

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The industries producing mineral water and beverages require the pretreatment of the water supplied in order to comply not only with legal potability limits but also with internal production protocols.
 An accurate chemical characterization of supply water, the knowledge of the quality of the water to be produced and the flows to be satisfied are the essential parameters to offer a suitable plant-engineering solution.
 There are many possible solutions:
 
 microfiltration through reverse osmosis systems;
 demineralization through ion exchange processes;
  filtration.
 
 In general, the water treatment line for this type of plants is upstream the phase of addition of syrups or other flavouring agents and bottling. The final disinfection of the water produced is therefore crucial to ensure the salubriousness of the finished product and quality (lack of unpleasant flavours);  these results can be achieved through the following processes:
 
 ozonization; 
 ultraviolet;
 chlorination;

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The treatment of the water used in the customer's production processes, such as the purification, recycling or pre-treatment process (see figure), passes first of all through special plants.

Only afterwards, in order to make improvements and achieve the desired result, specific chemical products are used, which aim at:

- preserving the perfect functioning of the plant
- conditioning process water in order to comply with law limits
- ensuring high treatment plant performance

By analysing the customer's production cycle and identifying the customer expectations, Water Team is able to offer customized plant-engineering solutions.

The achievement of the customer's expected result is ensured by the twenty-year-old experience of Water Team engineers and the high skills of the specialized workers employed