Space, appliances, utensils disinfection, preservation, deodorization and purification of air using ozone reference concentration
Reference concentration of ozone used in the air (1ppm=2.14mg/m?)
Type Concentration ppm Ozone per m3 per hour mg/H Usage
Medical appliances 20 50- 100 20ppm Disinfection time 60min (national standard YY0215.2-95)
Cold storage 6-10 15-25 According to the storage capacity and pollution level of the boot, the main kill mold
Food Workshop 1.0-1.5 2.5-3.5 daily after the shift to boot send O3 gas
Ward, operating room 2.5-5 5.5-15 need to be Turn on the machine when disinfecting, check the total number of bacteria according to the standard
Working clothes disinfecting 10-20 25-50 Relative humidity about 90%, clothes hang up with hangers
Anti-virus preservation General places 1-2 2.5-5 Regularly turn on the machine
Eggs 2-2.5 5-5.5 Intermittent supply of O3 gas, turn on the machine 2-3 times a day
Bananas 2-1.5 2.5-5.5 Every day after shift, turn on the machine to send O3 gas<
Banana 2.5-3.5 5.5-8
Apple 2.0 5
Vegetables with little chlorophyll 1.5-1 3.5-2.5
Fish, cheese 0.5-1 1.5-2.5
Deodorization and purification Morgue 3 7 Deodorization will be turned on if there is a bad smell
Fish processing plant 3 7 Pollutant gases enter the treatment pipe. If the odor is serious, put O3 gas into the pipeline to oxidize and deodorize. If the odor in the workshop is serious, O3 gas should be put in the workshop air inlet to smell O3 gas is appropriate.
Slaughterhouse 2-3 5-7
Fatty acid factory 10 25
Rubber factory 3-10 7-25
Rubbish waste treatment 10 25
Sewage treatment plant 1-2 2.5-5
From: Chemical Industry Publishing House, 2003.3, "Ozone technology and application"
The use of ozone should pay attention to:
1. China's Ministry of Health in 1979 developed the "Industrial Hygiene Standards," the safety standard for ozone is 0.15ppm. The U.S. standard provides that personnel can be in the 0.1ppm concentration of work for 8 hours. (General forest area ozone concentration can reach 0.1ppm) The International Ozone Association, the application of ozone in the professional indoor, in the 0.1ppm concentration, allowed to work for 10 hours.
2. The concentration that causes certain reaction of the personnel is 0.5-1ppm, and the permissible exposure time is 1.5 hours, and you will feel uncomfortable such as dry mouth after a long time. Concentration of 1-4ppm will cause personnel to cough, the permissible exposure time is 1 hour. Concentration of 4-10ppm will cause strong cough, and the allowable exposure time is 20 minutes.
3. The half-life of ozone is 20-50 minutes, and the final decomposition product is oxygen, so there will be no residual contamination of food.
4. Practice has proved that the application of ozone disinfection of mold for many years, no equipment, device material damage.
Ozone use --- water treatment
Currently in the world, pure water, natural water (spring water, mineral water, groundwater, etc. made after filtration and other processes), has been widely used ozone sterilization. In the application of ozone purification of tap water, the international conventional standard is 0.4mg / L tolerance to maintain 4 minutes, that is, the CT value of 1.6. The following table is a reference value.
Category indicators
Separation of water supply Pure water Natural water Tap water Swimming pool water
Water ozone concentration 0.1-0.3mg/L 0.2-0.4mg/L 0.4-0.6mg/L 0.4mg/L 0.2mg/L
Ozone added 1-2g/T 2-3g/T 3-5g/T 3-5g/ T 1-2g/T
Ozone (O?), also known as superoxide, is an allotrope of oxygen (O?), which is a light blue gas with a special odor at room temperature. Ozone is mainly distributed in the stratospheric atmosphere at an altitude of 10 to 50km, with extreme values between 20 and 30km altitude.
In 1840, C.F. Scheibain of Germany found that there was a special odor when electrolyzing dilute sulfuric acid, so he named it ozone. At room temperature and pressure, the stability is poor, can be decomposed into oxygen. Ozone has the flavor of grass, inhalation of a small amount of beneficial to the human body, inhalation of excessive human health hazards. It is non-flammable and pure. Oxygen can be changed into ozone by electric shock.
Ozone can be used to purify the air, bleach drinking water, sterilize, treat industrial waste and as a bleaching agent. During the summer months, surface ozone forms and accumulates in agricultural and forested areas, especially around large cities, due to the effects of industrial and automobile exhaust fumes. Surface ozone has an erosive and damaging effect on the human body, especially on the eyes and respiratory tract. Surface ozone is also harmful to crops or forests.