The principle of Vitii, the biomineral filtration

The world is in need of a change, urgently. It is often assumed that if we want to build towards a more sustainable, eco-friendly environment, we need to give up all pleasures in life. However, nothing is less true. With Vitii, an eco-friendly, bio-mineral filtration system for swimming pools, you can still enjoy your high-quality swimming experience, whilst having peace of mind. Want to know how this amazing idea becomes reality? Below, we provide you with an extensive explanation of Vitii’s technical characteristics and its associated advantages. So get your read on, and dive deep into the world of Vitii, one of Zuuvr’s core brands.

The biomineral filtration Vitii provides in 3 important steps water of the same quality as that of a mountain lake. Thanks to an ecological and economical system, one is able to enjoy and reenergize in water that is perfectly healthy. Due to the total absence of chlorine, all discomforts disappear for humans (red eyes, irritation, cough, …) and for nature (the drained water does not impact fauna and flora and does not require further treatment).

The figure below illustrates schematically the function of Vitii filtration and the 3 important steps to ensure water of mountain lake quality. Before describing these steps in a more detailed manner, we feel the need to emphasize the importance of such hydraulicity based on the following principles: sufficient flow rate to guarantee the renewal of water within 4 hours, a circulation speed in the pipes of less than 1,5m/s, a minimum of 50% suction of the surface water, and suction- and draining points installed in such way that prevents stagnation.

The functioning of each phase:

1. Removing all organic material: to keep water compatible with nature but unfavorable for the development of living organisms, all organic and non-organic nutrients need to be removed from the water. This phase takes up the largest part of the work. It can be divided in 3 steps:

a. The mechanical pre-filtration:  for the biological filtration, a polyvortex (see figure below) removes all parts larger than 0,05 mm using a centrifugal force. Ventilation occurs automatically on a daily basis. Thanks to due polyvortex, the main filter needs less service and considerable savings are made on water for rinsing and backwash of the main filter.

b. The biological filtration: To guarantee good biological filtration, Aquatic Science has developed a cocktail of good bacteria that are suitable to digest the main polluters of the bathing water (mainly toxic nitrogen chains like ammonia, nitrite, urea, …). Figure 3 (a) shows the nitrogen cycle in a swimming pond. This cocktail of bacteria is placed in a filter (about the size of a sand filter) on a substrate that is developed by Aquatic Science as well, to create an efficient biofilm. With this patented system, most organic elements present in the water, either parts of small elements or dissolved elements, are eliminated. Since the bacterial cycle is very short in time (couple of hours), the biofilm can adapt quickly taking the varying amount of swimmers into account.

c. Phosphosorb or the phosphate filtration: The proposed filtration network contains “Phosphosorb”. Phosphosorb is similar to a conventional sand filter, with the sand being exchanged for ferrihydroxide. Ferrihydroxide or Fe(OH)3 is a material known for its binding capacity with phosphates in water to form ferriphosphate. Simply stated, the chemical reaction is as follows: Fe(OH)3 + H3PO4 <> FePO4 + 3 H2O
This way, phosphor is retained in the filter with 12 to 16 g/kg ferrihydroxide, or 36 to 49 g phosphates per kg ferrihydroxide. Like stated in the advisory of the AFSSET regarding artificial swimming pools, a swimmer brings 20 tot 46 mg fosfor with him per single swim. The size of the Phosphosorb substrates is decided upon to account for the equivalence of the maximal number of expected swimmers during 500 days.

2. Disinfection and ventilation with the AS UV Synergy: The technology of AS UV Synergy is based on the synergy between UV C-rays and an advanced oxidation process, the photocatalysis. Like in all traditional UV C-sterilizers, the potential to eliminate pathogens and germs is utilized. But in the AS UV synergy, the efficiency of this destructive power is amplified on the inner surface of the stainless-steel sterilizer due to the photocatalytic function of a nanolayer of titanium oxide (TiO2). Figure 4 is a representation of the AS UV Synergy and the photocatalysis in the sterilizer. This catalysator causes an hyperoxidation that destroys the protective structure of the pathogens more quickly, and improves in that way the germ destructive power significantly. Other advantages of this oxidation process are:

1. The hydroxid radicals (OH) that are released by activation of the catalysator are twice as oxidative as chloride, without harmful consequences for our health.
2. The hyperoxygenation caused by the photocatalysis ensures a faster nitrogen cycle and oxygen enrichment of the water, which is good for the development of the biofilm.
3. The photocatalysis slows down calcium formation on the quartz glass.

3. Automatic restoration of the mineral balance: daily automatic adaptation of the bateria and minerals in functino of the usual events, and measures are done to always enjoy the optimal mineral balance. This balance is the key to crystal clear water and to prevent algae development.

All Vitii functions can be managed by use of an app, for example:
1. Automatic emptying (or manually put on) of the Polyvortex prefiltration with a certain frequency
2. Sequence of the automatic cleaning (or manually put on) of the biological filter based on performance of the pump
3. Management of the expenditure
4. Registration of the results of analyses.

Other advantages of a Vitii filtration:

o Operational profit:
o Up to 75% less new water needed:
– Results of the CSTB show that the system is capable to keep water parameters stable without obligated renewal, despite an amplified number of visitors
– Filters do not have to get cleaned as often (standard frequency backwash = 1/20 days during 50 seconds)
o 30% less direct operational costs
– Less new water needed
– Less new water also causes savings on heating costs
– A comparative study has shown that Vitii only uses 10% of products (minerals and bacteria) in comparison to a traditional filtration system

o Profit on infrastructure:
– No need to store chemical products (suphuric acid and chloride)
– No separate protection against corrosion needed (protection against most is sufficient)
– Impact on the sizes of reinforced concrete, on replacement of filter pumps, on materials of the frame, on the ventilation system, …)

o Profit on comfort:
 – More comfort for the swimmers (no prickling eyes, cough, dry skin, …)
 – No consequences for health (astma, cough, eczema due to chlorine products)
– Since discomforts disappear, better cooperation is achieved between swimming and other activities.

Technical characteristics of the Vitii solution

Zuuvr – tailormade filtration solutions

Zuuvr is an independent company that develops and builds filtration systems tailored to the customer. We work non-proprietary, which means that we can combine elements from different brands to create the best suitable option for you. Therefore, we only use filtrations and techniques that we support 200%. This way, we can always suggest a filtration system that perfectly meets the needs and wishes of the specific customer.
Often, the Vitii-system is at the core of our recommendation. If this complete bio-filtration is not the best solution for your project, we will however advise against this.
If a Vitii-filtration does seem to be the best solution for your project, we can still make modifications to fine-tune the system specifically to your project. This causes more savings and even better experiences than outlined by the manufacturer. Working tailor-made allows us equally to take over service contracts of filtrations or swimming pools that we did not place ourselves. It is also possible to make small (although significantly saving) modifications to existing systems, when a total renovation is not desired/possible/optimal.