Ozone is a strong oxidant, has a strong sterilization, bleaching, deodorization and other characteristics, and widely used in water disinfection, food storage and preservation and other area.
So, the level of ozone is an important data to make sure the effect of disinfection, energy conservation and pollution prevention.
1, Ozone concentration required in air sterilization
Ozone concentration in air standards (1ppm=2.14mg/m3)
|Applications||Items||Concentration ppm||Ozone output m3/h||Usage|
|Disinfection||Medical equipment||20||50-100||ozone concentration 20ppm need 60min disfection|
|cold storage room||6-10||15-25||open machine continous according the room capacity and pollution levels,primary,kill mold|
|food workshop||1.0-1.5||2.5-3.5||supply o3 gas after work|
|Wards, operating theaters||10-20||25-50||open machien when need,chenk number of bacteria by standard|
|workclothes disfection||10-20||25-50||Ralative humidity about 90%,clothes hanger to hang|
|general occasion||1-2||2.5-5||open machine regular|
|eggs||2-2.5||5-5.5||o3 gas supply interruption,2-3 times per day|
|morgue||3||7||open machine when have stink smell|
|slaughter plant||2-3||5-7||put the pollution gas into pipeline within o3 gas,o3 gas make oxidation deodorization|
|Deodorization||garbage waste treatment||10||25||effect.If work plant smell as serious，o3 gas should adding in the air inlet of the|
|fish processing plant||3||7|
Generally, the higher of the concentration of ozone the better of the sterilization effect.
2, Limit of ozone level in air purifier
In most countries ozone industrial hygiene standards is limit to 0.1 ppm( 0.20 mg/m 3). For example, indoor sterilization should be around 200 mg/ hr – 400 mg/ hr ozone output, this can make sure the indoor residual concentration below the health standards after ozone machine working 30-60 min. The important is some people with allergies should not prolonged exposure to ozone levels exceeds 0.18 mg / m 3 environment.
3, Ozone application engineering and equipment need detect the ozone concentrations
To a large extend, working condition like humidity, temperature… will influence the output of ozone generator, then detect ozone level timely is necessary. For large ozone generator, it should be install the high concentration ozone detector in working processing as well as the ozone tester test the ozonated water. At last, ozone monitor for ozone exhaust.