Download NEW SANITATION SERVICE BY TREATMENT WITH OZONE Ozone

NEW SANITATION SERVICE
BY TREATMENT WITH OZONE
Ozone and its physical characteristics
The ozone (O3 symbol) is a gas from the characteristic garlic odor,
whose molecules are formed by three atoms of oxygen. Christian
Friedrich Schönbein found out, during experiments that slow
oxidation of white phosphorus and water electrolysis.
Its chemical structure is a resonance hybrid between three formulas
possible limits, making it a highly reactive molecule.
Ozone as a disinfectant and disinfectant
The oxidizing action explicated by ozone has meant that since its
discovery was used as a bactericide, fungicide and inactivating
viruses.
It was initially used as a disinfecting agent in the production of
drinking water, in France since 1906 and in Germany since 1972.
The choice of ozone was based on the fact that it is more effective
than other disinfectants towards a wider spectrum of
microorganisms.
The different bacteria show variable sensitivity to ozone:
the Gram-negative bacteria are less sensitive than the Grampositive, spore-forming bacteria prove more resistant than the nonspore-forming. (Kim et al., 1999). Since the mechanism by which it
acts ozone is lipid peroxidation, the cause of the varying sensitivity
would be attributable to the different lipid composition of the
bacterial cell wall (Khadre et al., 2001; Khadre and Yousef, 2001;
Hoff, 1986). The inactivation of the virus has so far been less well
studied than that of bacteria, it is known that also occurs rapidly
after ozonation, even if it requires a supply of gas at concentrations
higher than required for the bacteria (Kim et al ., 1999). it is
observed, in fact, that the inactivation curves show a rapid
reduction of crops up to 99%, the remaining 1% requires a longer
time for total inactivation. Various studies on the sensitivity of the
virus to ozone have demonstrated that viruses fitted membrane are
significantly more sensitive than those that do not have them.
The mechanism of action of ozone on virus is definitely not one of
destruction, as in the case of bacteria, but inactivation; action
would consist of ozone oxidation and subsequent inactivation of
specific viral receptors used for the creation of the bond with the
wall of the cell to invade. Would thus be stuck in the mechanism of
viral replication at the level of its first phase: cell invasion.
The table below shows the approximate times for the elimination of
some pathogens.
Inactivation of bacteria, viruses, fungi, molds and insects
after ozonation
(Sources: Edelstein et al., 1982; Joret et al., 1982; Farooq and Akhlaque,
1983; Harakeh and BUTLER, 1985; Kawamuram et al.1986)
Body
BACTERIA
(E.Coli,Legionella,Mycobacteriu
m,
Fecal Streptococcus)
VIRUS
(Poliovirus
type-1,
Human
Rotavirus, Enteric virus)
MOULDS
(Aspergillus Niger, vari ceppi di
Penicillum, Cladosporium)
Concentration
Exposure
time
0,23 ppm2,2 ppm
<20
minuts
0,2 ppm 4,1 ppm
<20
minuts
2 ppm
60 minuts
FUNGUS
0,02 ppm (Candida Parapsilosis, Candida 0,26 ppm
Tropicalis)
INSECTS
1,5 - 2 ppm
(Acarus Siro, Tyrophagus Casei,
Tyrophagus Putrescientiae)
<1,67
minuts
30 minuts
AREAS OF USE OF SANITATION OZONE TECHNOLOGY
PRIVATE SECTOR
(Houses, condominiums, basements, toilets, facilities
air conditioning, cars, trucks, RVs)
PUBLIC SECTOR
(Shops, bars, restaurants, hotels, post offices, banks, schools,
waiting rooms)
HEALTH SECTOR
(Hospitals, hospital rooms, operating rooms, outpatient clinics,
medical and dental clinics, veterinary studies)
SECTOR ACTIVITIES 'SPORTS
(Gyms, saunas, solarium, swimming pools, locker rooms)
PRODUCTIVE SECTOR
(Canteens, food industries, canneries, bakeries, workshops
confectionery and ice cream shops, slaughterhouses, farms and
stables).
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