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Random idea...

I once posted the idea of inserting Brita filters into PVC pipes to make your own water filtration system. It just occurred to me that this could also be used to purify air. The flow would be greatly reduced but for confined areas this could be used to push a slightly purified air. It might look like a Blue Man Group bank of pipes but it would work.

It also occurs to me that these would be an idea method to cheaply scrub CO2 from a confined space. 1) Recirculate the CO2 laden air through the filter. 2) After X period of time pump regular air through the filter to "regenerate" the carbon. Granted algae might be a better solution overall but that requires water and a dry source is much easier to use.

Cross-posted from Dreamwidth ( http://nimitzbrood.dreamwidth.org/271498.html ) but feel free to comment here as well.




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( 2 comments — Leave a comment )
siliconshaman
Jun. 3rd, 2013 10:12 am (UTC)
I don't think Britia filters work quite like that... IIRC they're activated charcoal, so they won't adsorb CO2 for a start. Secondly, although they probably would filter some impurities out of the air, the pore size is designed for use in water, as such it wouldn't be very efficient.

I'd suggest using a anti-microbial HEPA filter intended for a Dyson vacuum cleaner, in up-stream series with a 6ft aquarium tank filled with clean water and duckweed.. [so the air bubbles though the water, using 3 or 4 6ft lengths of bubble curtain pipe.]

Hmm, you could throw in some fresh-water shrimp or guppies as well, to eat the duckweed and stop it overgrowing.

Of course, you'd still need the brita filters, to circulate the water through!

Edited at 2013-06-03 10:13 am (UTC)
mashblock
Jun. 3rd, 2013 08:33 pm (UTC)
Water filter won't do it - wrong media and too much resistance to flow.

Do a bit of web research on molecular sieves - neat stuff.

I have an off-the-shelf oxygen concentrator which uses this principle to extract ~95% pure O2 from air... I use it to directly feed a small gas/oxy torch for glassworking.
( 2 comments — Leave a comment )

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