Disinfection-Ozone Flashcards
what is ozone, discuss briefly how it is produced
Ozone is a strong oxidizing agent, the production of ozone is preformed by passing a high voltage electric charge into cool dry air where O2 will be converted into O3. The third atom is loosely bound and easily splits to unite with organic matter. 1 percent of atmospheric O2 is converted to O3 at 0.025 kwh/gr.
Required O3 dose for disinfectoin ranges between 0.25 mg/l and 5 mg/l with contact period of 30 seconds or less. Viruses require 0.25 mg/l-1.5mg/l with contact 45 sec to 2 min
Name and discuss some operational characteristics of ozone.
NO taste or odor for ozone “in water”
Ozone is not sensitive to pH
Ozone is affected by temperature ( breakdown increases and solubility decreases with temperature)
Ozone is instable and it lacks the residual thus it has to be generated onsite
It cannot compete in cost with chlorine
