Taiyo Kogyo Column
Reliable sterilization effect and safety of “ozone generator” for professional use for medical institutions
2020.08.13
Those working in healthcare facilities fight day and night to protect the health of their patients. However, healthcare workers, especially those involved in infectious diseases, must simultaneously ensure their own safety as well as that of their patients. By using an “ozone generator,” sterilization can be performed reliably, safely, and quickly. This section introduces the performance and practical examples of ozone generators that use ozone, which has a high sterilization effect with a virus kill rate of 99.9% or higher. If you are related to a medical institution, please consider this as one of your sterilization solutions.
Challenges and the need for sterilization equipment in healthcare institutions
As of 2020, the impact of the new coronavirus has led to an increased focus on “countermeasures against the spread of infection,” not only among healthcare professionals but also among the general public. It is probably fresh in our minds that, in addition to washing hands and wearing masks, measures such as sterilization of contact areas are now being taken at home and in offices. Medical institutions have also taken the same measures, and now require not only general preventive measures but also superior sterilization solutions that only a specialized institution can provide. As a place to treat illness, hospitals attract people with a wide range of conditions. This means that infectious disease pathogens such as viruses and bacteria gather in large numbers as well. In addition to infected patients, hospitals are also visited by immunocompromised people, making further sterilization measures necessary. A simple, quick, safe, reliable, and low-cost sterilization solution that is easy for medical institutions to implement. That is the method using “ozone sterilization equipment.
Protecting medical institutions with "ozone" that has a strong sterilizing effect
Ozone is an allotrope of oxygen with the chemical formula “O3” and is generally known as the ozone layer. What is less well known is its sterilizing power. In fact, it has an extremely strong oxidizing effect, second only to fluorine, and is already being used as a solution for sterilization and deodorization not only in the medical field, but also in the food and agricultural industries. In Japan, ozone is approved as a food additive, and in other countries, ozone is used to sterilize tap water in place of chlorine. What makes ozone sterilization even better is that the effectiveness of the sterilization can be visually confirmed by the “CT value. By checking the CT value using the ozone sterilization equipment, it is possible to check with certainty whether the sterilization is complete or not. The CT value is an internationally recognized standard indicator of the degree of sterilization effect of ozone. It is calculated as concentration x time, and the higher the value, the more effective the sterilization. The table below shows the sterilizing effect of each CT value. At a CT value of 60, influenza viruses are almost certainly killed. (CT value of 60 is the value obtained after 10 minutes of exposure to a concentration of 6 ppm.
>>Reference: “Expected Effectiveness of Ozone Water against New Type of Coronavirus” announced by the Japanese Society for Medical and Environmental Ozone Research.
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, Labor 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
The use of “ozone generators,” which use ozone with high sterilizing properties, can protect medical facilities.
Ozone generator" that generates ozone gas to sterilize medical institutions space by space.
Sterilization by ozone is performed by filling an enclosed space with ozone gas and exposing the sterilization agent. The ozone gas is generated by an “ozone generator.
(An example of ozone sterilization equipment Source: Tamrateco Inc.)
Ozone generators have superior features compared to other sterilization methods. First, they are extremely easy to operate. Operation begins simply by connecting to a household power source and turning on the switch, and the process is automatically controlled, so there is no need for specialized knowledge. The fact that “anyone can handle it” greatly reduces the burden on the site where it is used. Another important feature is that no chemicals or other raw materials are required. The ozone generator can produce ozone gas using only oxygen in the air and electricity, so there is no need to prepare or stockpile any other chemicals. No waste liquid is generated, so there is no need for post-treatment. This makes it both simple and low-cost. The ozone generator is used in conjunction with a tent for filling with ozone gas for sterilization. The complete system, including the tent, is called an “ozone sterilization tent system,” which has been attracting a great deal of attention in recent years.
Ozone Sterilization Tent System" and its deployment examples
The term “ozone sterilization tent system,” as the name implies, refers to an ozone generator, a tent, and an accompanying set of parts for sterilization. It consists mainly of the following four components
- Ozone sterilization air tent
- Air pump for air tent installation
- Ozone Generator
- Ozone Resistant Masks
An air tent is set up using a pump, and ozone gas is filled inside the tent using an ozone generator. Sterilization is performed by having the subject wearing an ozone-resistant mask enter the tent. It takes only about 15 minutes to do all this. The flow of sterilization can be visualized more concretely in the following diagram.
The tent-based system can kill influenza viruses on the human body and clothing in as little as 10 minutes after entering the room. Furthermore, the outstanding feature of the ozone sterilization tent system is that the completion of sterilization can be reliably confirmed by monitoring CT values. The CT value can be safely checked from outside the tent using the panel shown in the image, enabling leak-free and reliable sterilization.
Furthermore, ozone generators can be utilized in spaces other than tents. For example, the interior of a vehicle used for emergency transportation of patients with infectious diseases is a space that needs to be thoroughly sterilized. In such places, simply bringing in an ozone generator and turning it on will ensure sterilization to protect medical personnel and patients.
summary
In order to protect the health of the healthcare professionals who protect the health of our patients, we would like to encourage you to utilize ozone generators to implement safe and reliable sterilization. For more information about ozone generators, please contact us at the following How much does it cost?
How do I install it?
Please feel free to contact us if you have any such requests.
Taiyo Kogyo Corporation: Inquire about the ozone sterilization tent system.
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