using light to fight contamination
Posted 04 February 2007 - 05:34 PM
I didnt want to post a link to them since i dont want to advertise for any brand inparticular
but it said to use it properly it has to be 1/4 inch - 4 inches away from the light area.
a google search shows a few options
you guys may be right and it may not work at all
just figured id post the idea and let the chips fall where they may
Posted 04 February 2007 - 10:37 PM
anyone have an opinion on how well these sterilize air?
Posted 05 February 2007 - 11:05 AM
The UV only kills what it hits, and large particles moving through an irradiated air stream will have sterilized surfaces, but there will likely be survivors in the microscopic shadows within particulates. Same goes with scratches on countertops, and why steam cleaners are the most effective for such surfaces (there are micro-pores even in polished stainless steel, steam penetrates where light doesn't). That's why a good mechanical filter is needed upstream of the UV, thus minimizing the number of larger particles and thereby effecting a greater rate of sterilization.
This might allow for the creation of cheaper HEPA type flow hoods if a less-efficient (cheaper) filter were used upstream of a UV light, plus I see a great use for them in the air recirculation system of a grow house (larger scale grow obviously, like commercial edible farm) to minimize contaminant spore loads in the grow room.
For in-room UV use, I'd recommend a Photo Catalytic Oxidation filter, which is just a UV germicidal lamp in a box next to a titanium catalyst that creates short-lived oxygen free radicals (it's NOT an ozone generator) that denature DNA and break apart particles, including odors. I had an electrical connection melt and scorch and almost catch fire, but when I walked into the room I could smell no trace of burning plastic even though a lot was melted and blackened, so I guess this technology works. That, and my contam rates have dropped to almost zero since I got it.
Posted 05 February 2007 - 12:19 PM
Posted 05 February 2007 - 01:04 PM