Ozone Concentrations Required in Water Treatment
In water treatment, the solubility of ozone scope is 0.1mg / L ~ 10mg / L. The lower concentration could be for water disinfection and purification. And a high concentration could be as "ozone water disinfectant".
Tap water purification:
International concentration level is 0.4PPM ( Mg/L), the treating time is 4 minute. The CT will be 1.6;
The dissolved ozone concentration0.1-0.5Mg/L in water, to meet disinfection purposes within 5-10 minutes.
Ozone water disinfection and sterilization is rapid and occur in an instant. To kill the bacteria in 0.5-1.0 minute; Under the concentration of 4PPM (mg /L) to kill hepatit is B virus 100%in 1.0 minute.
Herbold reports: Under 20 ℃ conditions, the ozone concentration in water 0.43mg / L, can be 100% kill of E. coli, and underthe 10 ℃ to kill all E. Coli at 0.36Mg/L only.
The ozone concentration 0.25-0.38Mg/L,kill all HAV in several minute.
The solubility of ozone in the 0.4 ~ 0.5mg / L can meet the requirements of sterilization. The ozone dosage is 1.5 ~ 2.0mg /L.
Require the ozone dissolved in water 0.3-0.5mg/L; The ozone dosage is 2 grams per 1000 liters water. According to practical experience, the ozone gas concentrations higher than 8mg / L will be susceptible to meet this level.