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Ozone and it’s effect on pathogens (disease causing organisms)

Ozone is very effective in fighting pathogens (disease causing organisms), much more effective than chlorine for example. Besides that, ozone also works way faster.

Other advantages of using ozone are:

  • It doesn’t leave residuals
  • Resistance against ozone isn’t possible
  • It works 3000 times faster than chlorine
  • Good results even at short contact times
  • It works against all pathogens, unlike other biocides and antibiotics

Ozone and bacteria

Ozone breaks through the cell membrane of a bacteria which causes it to die. Conventional biocides poison the bacteria and there’s a chance the bacteria will grow resistant. That’s not possible when ozone is used!

Ozone and viruses

A virus is inactivated by ozone because it damages the virus’ RNA / DNA structure. A virus doesn’t have a repair mechanism so the inactivated virus can no longer multiply and tolerance or resistance can’t occur.

Below, a table with various pathogens and the influence of certain ozone dosages on them. Ozone can be used to fight all pathogens, this list just gives you an example of the dosages and the contact times.

Pathogens

Pathogen Ozone dosage Duration of treatment*
Bacillus Bacteria 0.2 mg/l 30 seconds
Bacillus cereus Log 2 (99%) reduction at 0.12 mg/l 5 minutes
B. cereus Log 2 (99%) reduction at 2.3 mg/l 5 minutes
Bacillus subtilis Log 1 (90%) reduction at 0.1 mg/l 3 minutes
Bacteriophage f2 Log 4 (99,99%) reduction at 0.41 mg/l 10 seconds
Botrytis cinerea 3.8 mg/l 2 minutes
Clavibacter michiganense Log 4 (99,99%) reduction at 1.1 mg/l 5 minutes
Cladosporium Log 1 (90%) reduction at 0.1 mg/l 12,5 minutes
Coxsackie Virus A9 95% reduction at 0.035 mg/l in water 10 seconds
Echo Virus 29 1 mg/l 1 minutes
Enteric virus 95% reduction at 4.1 mg/l in waste water 29 minutes
E-coli (in clean water) Log 4 (99,99%) reduction at 0.25 mg/l 2 minutes
E-coli (in waste water) Log 4 (99,99%) reduction at 2.2 mg/l 19 minutes
Encephalomyocarditis Virus Log 4 (99,99%) reduction at 0.8 mg/l 30 seconds
Enterovirus Virus Log 4 (99,99%) reduction at 0.8 mg/l 30 seconds
Fusarium oxysporum f.sp. lycopersici 1.1 mg/l 10 minutes
Fusarium oxysporum f.sp. melonogea Log 4 (99,99%) reduction at 1.1 mg/l 20 minutes
GDVII Virus Log 4 (99,99%) reduction at 0.8 mg/l 30 seconds
Herpes Virus Log 4 (99,99%) reduction at 0.8 mg/l 30 seconds
Legionella pneumophila Log 4 (99,99%) reduction at 0.4 mg/l 20 minutes
Luminescent Basidiomycetes Log 4 (99,99%) reduction at 100 mg/l 10 minutes
Mucor piriformis Log 4 (99,99%) reduction at 3.8 mg/l 2 minutes
Mycobacterium foruitum Log 1 (90%) reduction at 0.25 mg/l 2 minutes
Phytophthora parasitica Log 4 (99,99%) reduction at 3.8 mg/l 2 minutes
Poliomyelitis Virus Log 4 (99,99%) reduction at 0.4 mg/l 4 minutes
Poliovirus type 1 Log 2 (99%) reduction at 0.25 mg/l 2 minutes
Rhabdovirus virus Log 4 (99,99%) reduction at 0.8 mg/l 30 seconds
Salmonella typhimurium Log 4 (99,99%) reduction at 0.25 mg/l 2 minutes
Staph epidermidis Log 1 (90%) reduction at 0.1 mg/l 2 minutes
Stomatitis Virus Log 4 (99,99%) reduction at 0.8 mg/l 30 seconds
Streptococcus Bacteria Log 4 (99,99%) reduction at 0.2 mg/l 30 seconds
Verticillium dahliae Log 4 (99,99%) reduction at 1.1 mg/l 20 minutes
Vesicular Virus Log 4 (99,99%) reduction at 0.8 mg/l 30 seconds
* The duration of the treatment depends on the dosage, at higher dosages, the duration can be shortened and vice versa. Keep in mind that many pathogens need a minimum ozone concentration!