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Drinking water ozonation

It is a fast and efficient water disinfection process compared to other compounds such as chlorine and chlorine dioxide. It is also a natural gas and does not leave harmful by-products as is the case with the use of other disinfectants.

Ozone treatment as an advanced oxidation process is used in technological processes because:

accelerates some chemical reactions (e.g. oxidation)
supports filtration processes through agglomerations of molecules
allows you to effectively remove, among others iron, manganese and ammonia
accelerates the oxidation of micro-impurities and natural organic matter
restores water to its natural color and crystal transparency
removes unpleasant taste and smell from water
ensures microbiological purity - removes bacteria, viruses, their spores and cysts as well as molds and fungi

Applications of ozone in industry

Using ozone generators or ozone saturated water, ozonation can be used to:

for rinsing and disinfecting bottles
in food production for the treatment of production and technological water,
in the production of mineral water,
for washing and disinfecting fruit, vegetables, vegetables and meats - delays spoilage and overheating
for disinfecting rooms
in ice production - extends the shelf life of frozen food,
when breeding fish in ponds - in the processes of continuous water treatment and aeration,
in swimming pools for removing (oxidizing) impurities and disinfecting water
in closed cycles of mineral water recovery,
for mineralization, treatment and decolorization of sewage,
for removing unpleasant odors - deodorization
Clean In Place (CIP) for disinfecting equipment

Ozone disinfection

Removal of pathogens and the origin of Giardia lamblia and Cryptosporidum parvum is one of the main goals of drinking water treatment. Table 1 summarizes the CT product values required to inactivate 99% of the most important pathogenic organisms. Ozone is the strongest disinfectant and the only effective agent for inactivating cysts and oocysts of parasitic protozoa.

Herbicide and pesticide removal

Most of these substances are effectively oxidized during a full water purification process starting with pre-ozonation and ending with the combination of ozonation and sorption on granular activated carbon

Table 1. CT product values required to inactivate 99% (21og) of microorganisms at 5 + 25 ° C (1)

Microorganism	Ozone pH = 6 + 7	Chlorine pH = 6 + 7	Chloramine pH = 8 + 9	Chlorine dioxide pH = 6 + 7
Escherichia coli	0.02	0.03 + 0.05	95 + 180	0.4 + 180
Polyovirus 1	0.1 + 0.2	1.1 + 2.5	770 + 3500	0.2 + 6.7
rotavirus	0.006 + 0.06	0.01 + 0.05	2810 + 6480	0.2 + 2.1
Giardia lamblia (cysts)	0.5 + 1.6	30 + 150	+ 750 2200	10 + 36
Cryptosporidiumparvum (oocysts)	2.5 + 18.4	7200	7200 (1109)	78 (1109)

Typical ozone half-life depending on temperature .

Gas Ozone in ice		Dissolved in water	(pH 7 )
Time	Temperature	Time
3 months	-50 * C.	30 minutes	15 * C.
18 days	-35 * C.	20 minutes	20 * C.
8 days	-25 * C.	15 minutes	25 * C.
Three days	-20 * C.	12 minutes	30 * C.
1.5 minutes	120 * C	8 minutes	35 * C.
1.5 seconds	250 * C

These values are based on the thermal composition, wall effects and other catalytic effects are not included

The actual half-life of ozone will be significantly shorter when it comes to organic load, along with pressure, humidity and other factors. These values give a good indication of how quickly ozone decomposes, as well as how high the temperature of the factor affects the half-life of ozone.

Temperature can play both positive and negative effects on ozone applications. When the temperature is very low, the half-life of ozone is very long, however, ozone is much more stable and may not react as soon as we assume. In contrast, when temperatures are very high, the ozone half-life may be so short that there is no time for ozone, or the ozone reaction rate may not be accelerated sufficiently to create the desired reaction in a shorter time. When working with ozone, the key factor will be maintaining proper concentration and temperature.

Equipment and systems for water ozonization

Blue Planet company for industrial applications offers oxygen generators from pressure concentrators. Our devices can be cooled by water or air depending on the operating conditions and power of the device. We offer help in the design of water installations and the method of dosing ozone into water. We offer ozone measuring equipment in water and air.