Taiyo Kogyo Column
Why “Ozone Sterilization” is so effective in preventing nosocomial infections│Introduction of Ozone Sterilization Tent System
2020.08.13
Nosocomial infections are the spread of infectious diseases in hospitals and other medical facilities. Various sterilization measures have been taken to prevent such infections, but one that has not yet been widely recognized is the use of ozone for sterilization, despite its high effectiveness. Ozone is an excellent disinfection solution that has a 99.99% virus kill rate and other extremely powerful disinfection effects, as well as various other advantages not found in other solutions. This presentation will show you why ozone helps prevent nosocomial infections and how to implement sterilization using ozone. Healthcare professionals and those in charge of quarantine at government agencies are encouraged to refer to this page.
What is nosocomial infection?
The transmission of a virus or other pathogen inside a hospital or healthcare facility is called a nosocomial infection. As of 2020, the term is often heard due to the impact of the spread of the new coronavirus. Hospitals are places where infected people tend to gather because they are the site of treatment, and people who are immunocompromised by other diseases tend to gather at the same time, making it necessary to be more careful about the risk of infection than in a general environment. Therefore, more thorough measures are needed to prevent infection. It is well known that alcohol is used to sterilize spaces and materials as a measure to prevent infection, but in fact, ozone can be used to achieve highly effective sterilization.
What is "Ozone Sterilization" with high virus killing effect?
Ozone, best known for the ozone layer, is an allotrope of oxygen consisting of three oxygen atoms (O3). It is present in the earth’s atmosphere in small amounts and is toxic, but it is highly effective in sterilizing bacteria. It has a strong oxidizing effect and is used in a wide range of fields, including medicine, food, and agriculture, for sterilization, disinfection, and deodorization of chemical and dead odors. In Japan, it is also approved as a food additive. Ozone sterilization” is a measure to sterilize an object by generating ozone gas and exposing it to a certain concentration for a certain period of time. Unlike other sterilization methods, ozone gas is generated using oxygen in the air, so no chemicals are required. Ozone gas is generated by an “ozone sterilization device,” which fills a special tent with ozone gas to increase the “CT value” for sterilization. The CT (Concentration Time) value is an international indicator of the sterilizing effect of ozone gas, and can be calculated as “Concentration (ppm) x Contact Time (min). The higher the CT value, the more effective it is. For example, by CT value 60, the virus killing rate can be achieved as shown in the table below.
Sterilization data by ozone gas
Virus/Bacteria | CT value (ppm x min) |
Killed/reduced rate (%) |
||
---|---|---|---|---|
(1) General bacteria | General bacteria | E. coli | 60 | 99.99 |
2) Staphylococcus pyogenes (Streptococcus pyogenes) | Staphylococcus pyogenes | 60 | 100 | |
(iii) | Staphylococcus aureus IFO 12732 (Streptococcus pyogenes) | 24 | 100 | |
④ Staphylococcus aureus N20 | Staphylococcus aureus N20 | 60 | 99.98 | |
5) | Staphylococcus aureus RN2677 | 60 | 99.98 | |
⑥ | H1N1 Influenza | 18 | 99.7 | |
7) | New influenza ( H5N1) (highly virulent avian influenza) | 60 | 100 | |
(viii) | Norovirus | 72 | 100 | |
(ix) | Bacillus cereus IFO 13494 (Bacillus cereus) | 24 | 100 | |
(10) | Vibrio parahaemolyticus IFO 12711 (Vibrio parahaemolyticus) | 24 | 100 | |
(11) (11) | Salmonella typhimurium IFO 14193 (Salmonella) | 24 | 100 | |
⑫ | Hydrogen sulfide | 28 | 100 |
The verification organizations for each item in the table are as follows.
- (1), (2), (4), (5) … Microbiology Laboratory, Showa Pharmaceutical University
- 6)…Department of Virology, Kitasato University
- (7) … Ministry of Health, Labour and Welfare and Fire and Disaster Management Agency
- 8)…Vision Bio Inc.
- (3), (9), (10)…Japan Food Analysis Center, Inc.
- (11) … Okayama Industrial Technology Center
- ⑫…Wakayama City Fire Department
How to prevent nosocomial infection with "Ozone Sterilization Tent System
Since ozone’s sterilizing effect weakens when exposed to air, it is best to use ozone in an enclosed space, such as a tent, to maximize its effectiveness. The ozone sterilization tent system, which combines an ozone sterilization device and a tent, is attracting attention from medical institutions as a highly effective solution for sterilization. As of 2020, the effectiveness of ozone sterilization against the raging new coronavirus has also been confirmed.
>> The ozone sterilization tent system uses an “air tent” that can be inflated with air, and sterilization is performed in the following flow. For example, when ozone concentration is 6ppm, influenza virus can be sterilized in about 10 minutes.
Sterilization implementation flow with ozone sterilization tent system
- Installation of ozone sterilization tent
- Ozone gas filling
- Wearing ozone masks
- Enter the ozone sterilization tent
- bacteria elimination
- Completion of sanitization and leaving the room
Excellent features of the ozone sterilization tent system
The air tent used in the ozone sterilization tent system is lightweight and easy to carry, and installation takes only a few minutes. The ozone sterilization equipment operates simply by connecting to a household power source and turning on the switch, and the process is automatically controlled, so no specialized skills are required for operation. The device can also visually determine the status of sterilization by checking the CT value, which enables reliable, leak-free sterilization. At the same time, the high sterilization effectiveness described above can be achieved in a very short time.
- Lightweight, easy to carry, and flexible in any location
- High sterilizing power with a virus kill rate of 99.9% or higher
- Safety recognized as a food additive
- Certainty of visually confirming the sterilization process
- Can be used with a household power source and requires no chemicals, resulting in low cost
- Short time from installation to completion of sterilization
summary
The ozone sterilization system is an ideal sterilization solution with these excellent features. Ozone sterilization is expected to be immensely effective in preventing nosocomial infections. We provide further information for healthcare professionals and government officials in charge of quarantine. Please contact the following office for further information.
Taiyo Kogyo Corporation: Inquire about the ozone sterilization tent system.
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