I like the looks of that Campingaz Bunsen.
Not that I think it will actually "clean the air," but I agree with working near a lit flame. More to create an upward air current that keeps anything from settling on the items that I'm trying to keep sterile, than to clean the air. Also, being hands free is a huge bonus to me. Flicking my Bic every time would get very tiresome.
I went with the spirit lamp, aka alcohol lamp, over the Bunsen type burner because the alcohol burns cleaner and a little cooler than propane.
I'm burning Everclear here.
I've read that methanol will have an invisible flame, ethanol will have a blue flame, and isopropyl will have a yellow flame.
I believe the orange/yellow tip of my flame is due to the burning of other gasses in the atmosphere along with the ethanol.
(Beer in photo for size reference)
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There's an adage in biology that microbes do not fly. Can't remember who said this to me, but the point was that if you kept an updraft around your work, it would pull that microbes away. The microbes cannot direct their own movement, so they will follow the flow you provide, up and away.