Author Topic: Ozone: A powerful weapon to combat COVID-19 outbreak  (Read 5269 times)

Rupert

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Ozone: A powerful weapon to combat COVID-19 outbreak
« on: March 12, 2020, 05:04:39 PM »
no idea how reliable this is:
http://www.china.org.cn/opinion/2020-02/26/content_75747237_4.htm

But I had a coffee with a chap selling these to care homes a couple of years ago.  It gets ride of the smell of wee, and cleans the room.

I have no idea what concentration is needed, but I found this too:
https://patents.google.com/patent/CA2602230A1/en
Quote
A method of sterilizing a closed environment is provided in which an ozone generator is placed into the closed environment; it then generates ozone to a predetermined ozone concentration and increases the humidity of the closed environment. The ozone concentration is maintained at the predetermined ozone concentration for a predetermined period of time, and after the period of time has expired, the ozone is depleted. When the ozone concentration is reduced to a predetermined safe level, the ozone generator signals.


Bought this:
https://www.ebay.co.uk/itm/202919108341

Actually bought that in haste, as I dont know how much is needed. There are stronger ones that produce 5000mg/hr, but the docs seem to talk of parts per million for sterilisation.

https://www.ncbi.nlm.nih.gov/pubmed/23538847

Quote
A high-level aseptic environment must be maintained in bio-cleanrooms used for the manufacture of sterile products. In the past, formaldehyde gas was most commonly used to sterilize bio-cleanrooms, but due to strict residual limitations there has been a need to develop a less toxic alternative choice. The authors have developed a revolutionary new sterilization system using a high concentration of ozone gas and used this system to sterilize an actual bio-cleanroom. This system integrates the ozone gas generator with the air conditioning system by proper control. The design specifications for the system included an ozone gas concentration of 200 ppm or more, relative humidity of 80% or more, and a sterilizing time of 120 min. Blow vents and suction ports were placed to ensure a uniform airflow which would extend through the entire room during ozone gas sterilization. Tests regarding long-term material exposure to ozone gas were conducted when the system was introduced to distinguish usable and unusable materials. In an actually constructed cleanroom, simulations were used to predict the evenness of the diffusion of ozone gas concentration and relative humidity during ozone gas sterilization, and measurements of the actual indoor ozone gas concentration, temperature and relative humidity during sterilization revealed that the ozone concentration and relative humidity needed for sterilization had been achieved generally throughout the entire environment. In addition, the CT value (mg/m(3) (=ppm) × min) , derived by multiplying the ozone gas concentration during ozone gas sterilization by the sterilization time, was equal to or greater than the target value of 24 × 10(3) (ppm·min) . When the results of sterilization in a cleanroom were confirmed using a biological indicator (BI) , negative results were obtained at all measurement points, demonstrating that sterilization was being performed effectively in the actual factory at which the ozone gas sterilization system had been introduced.
« Last Edit: March 12, 2020, 05:14:03 PM by Rupert »
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rcjordan

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Re: Ozone: A powerful weapon to combat COVID-19 outbreak
« Reply #1 on: March 12, 2020, 05:21:35 PM »
Seems reasonable. I just ordered 2 commercial units. One for my brother's house (he's high risk and has to go out daily for meals and required medical appointments).

https://www.amazon.com/Enerzen-Commercial-Industrial-Deodorizer-Sterilizer/dp/B01M7VOSH1?th=1

Travoli

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Re: Ozone: A powerful weapon to combat COVID-19 outbreak
« Reply #2 on: March 12, 2020, 10:15:05 PM »
I've got a couple of the Enerzen units. Make sure everyone is out of the room/house while they run. They are powerful and irritate lungs.

They fix smokey AirBnBs and rental cars. Consider switching on/off remotely with an Alexa outlet (but they have timers built in). Very effective.

Brad

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Re: Ozone: A powerful weapon to combat COVID-19 outbreak
« Reply #3 on: March 13, 2020, 06:53:56 PM »
Amazon had a $20 coupon on the one you linked to RC, so I ordered it.

rcjordan

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Re: Ozone: A powerful weapon to combat COVID-19 outbreak
« Reply #4 on: March 13, 2020, 07:01:55 PM »
>ordered

Yeah I got the $20 coupon. 

Even if it doesn't work, it'll help me feel proactive about my disabled brother and maybe help de-stress him.  But I DO think it will likely help with passive decontamination of surfaces.

>lungs

You have any further tips on this machine, Trav?
« Last Edit: March 13, 2020, 07:04:46 PM by rcjordan »

Rupert

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Re: Ozone: A powerful weapon to combat COVID-19 outbreak
« Reply #5 on: March 13, 2020, 07:06:21 PM »
Quote
You have any further tips on this machine, Trav?

the chap who was selling them industrially, set them going for 2 hours, and then said you had to leave the room for 3-4 hours for it to be clear.  I seem to remember him saying that the o3 is unstable, so actually it was safe to enter after an hour.

It would be worth checking the facts.
https://www.google.com/search?client=firefox-b-d&q=how+quick+does+o3+dissipate

Quote
How Long Does It Take For Ozone To Dissipate? Ozone will last between 30 minutes to 4 hours for the third oxygen atom to breaks apart and reverts back into oxygen. On a lower concentration level, it will typically take 30 minutes to 1-2 hours for ozone to breaks down into breathable oxygen
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Rupert

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Re: Ozone: A powerful weapon to combat COVID-19 outbreak
« Reply #6 on: March 13, 2020, 07:07:52 PM »
mmmm.... worth a read... no idea of accuracy again though:
https://learn.allergyandair.com/ozone-generators/

I go to the sea for my ozone... I think they are talking about a different use of ozone.  Blast a room, leave it for a bit, and I think its likely fine.  might kill some nastys too.
« Last Edit: March 13, 2020, 07:10:34 PM by Rupert »
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rcjordan

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Re: Ozone: A powerful weapon to combat COVID-19 outbreak
« Reply #7 on: March 14, 2020, 06:45:21 PM »
Man, these things are strong!

(Amazon got through, Brad.)

Travoli

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Re: Ozone: A powerful weapon to combat COVID-19 outbreak
« Reply #8 on: March 14, 2020, 06:53:20 PM »
>tips

Consider combining with UV lights for best passive treatment. I like Alexa's remote-controlled plugs. Turn them off when you're headed back to the house. You'll have to figure out the dissipation timing for your application. I'd start with an hour. HVAC/ceiling fans will circulate/dissipate it more quickly. Open a window if it smells like O3 when you return.

https://www.chinadaily.com.cn/a/202003/04/WS5e5ee878a31012821727c0f4.html
« Last Edit: March 14, 2020, 06:56:51 PM by Travoli »

rcjordan

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Re: Ozone: A powerful weapon to combat COVID-19 outbreak
« Reply #9 on: March 14, 2020, 06:55:18 PM »
Louise read that they'll kill plants.  That's problematic.

Brad

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Re: Ozone: A powerful weapon to combat COVID-19 outbreak
« Reply #10 on: March 14, 2020, 07:27:43 PM »


>(Amazon got through, Brad.)

I'm glad yours got through RC.

Yeah, the pack mule with my canned hams was braying outside my door this morning. 


Edit: I got the wrong thread.  Moved stuff to the regular cornoavirus thread.

« Last Edit: March 14, 2020, 08:20:57 PM by Brad »

nffc

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Re: Ozone: A powerful weapon to combat COVID-19 outbreak
« Reply #11 on: March 14, 2020, 09:27:30 PM »
Louise read that they'll kill plants.  That's problematic.

Want me to have a word? I have a way with women.

Brad

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Re: Ozone: A powerful weapon to combat COVID-19 outbreak
« Reply #12 on: March 15, 2020, 02:54:04 PM »
RC, Amazon got through for me too.  I now have a Ozone generator, one each, delivered today.

I have no houseplants to worry about.

rcjordan

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Re: Ozone: A powerful weapon to combat COVID-19 outbreak
« Reply #13 on: March 15, 2020, 03:24:33 PM »
Louise is moving the plants to the foyer.

I've ordered a UV germicidal lamp. Man, nobody is shipping Prime on those and most are saying mid-April to May delivery.  I bought a bulb and a lamp base and will make my own fixture. The bulb is currently out of stock but scheduled to ship by March 28.  *IF* it arrives, I'll make it remote control by using Hubitat.  I've also ordered a pair of cheap uv-protective glasses 'cause I tend to be slack.

nffc

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Re: Ozone: A powerful weapon to combat COVID-19 outbreak
« Reply #14 on: March 15, 2020, 07:59:38 PM »
>I've ordered a UV germicidal lamp

Ditto, but before they went out of stock.

Porch + Ring Doorbell + Light = Delivery quarantine area

Lamp also handy for a make shift mask steriliser.