Re: [compost_tea] Re: Air Required was: Air pump selection & 5 gal brewer

From: David Loring <dloring3_at_cox.net>
Date: Sat, 4 Oct 2003 07:32:06 -0700

Stuart - That's why we pay people to design machines. Put all the info on =
one page, read it over, then go buy a pump. It'll probably work fine.

Dave
  ----- Original Message -----
  From: Stuart Baxter
  To: compost_tea_at_yahoogroups.com
  Sent: Friday, October 03, 2003 11:30 AM
  Subject: Re: [compost_tea] Re: Air Required was: Air pump selection & 5 g=
al brewer


  Can we keep this thread going........I'm thoroughly confused about oxygen=
ation now!
   
  What with shear, simple aquarium air pumps vs. $500+ 1/3 HP blowers, and =
big bubbles vs. small bubbles, and shallow tanks vs. deep ones.......arrggg=
h. What do I need? Does anyone have any definitive answers that will stand =
up to scrutiny or are these opinions? (bearing also in mind that air = 21=
% oxygen, 70+% nitrogen......)
   
  # I'm forever blowing bubbles, pretty bubbles in the air.............# =
   :o}
   
  Stuart
    ----- Original Message -----
    From: johnz4wi
    To: compost_tea_at_yahoogroups.com
    Sent: Friday, October 03, 2003 2:41 PM
    Subject: [compost_tea] Re: Air Required was: Air pump selection & 5 gal=
 brewer



    There are different kinds of diffusers. www.aquaticeco.com has a
    good selection. From coarse to ultra-fine bubble size. I got the
    medium bubble stones for my home made brewer.

    John


    --- In compost_tea_at_yahoogroups.com, soilfoodweb_at_a... wrote:
> As bubbles rise through the liquid, we see fungal strands caught in
    the
> interface between the small bubbles rising at different rates
    through the through
> the liquid.
> A factor of surface tension? But as the small bubbles move, the
    fungal
> strands caught in the interplay of the tiny bubbles are shattered
    and ripped apart.
>
>
> I think this is critical when some micrometer size bubbles are
    suspended
> basically un-moving in the water, while slightly larger bubbles
    move past the
> smaller size bubbles.
>
> I report what I observe. Not being a physicist, I am not certain
    what
> physical phenomenon this represents, but fungal strands don't do
    well in liquids
> with very small diameter bubbles. Another reason that carbonation
    works so well
> to suppress fungal growth?
>
> Elaine Ingham
> President, Soil Foodweb Inc.
> www.soilfoodweb.com
> SFI Oregon, USA
> SFI Australia
> SFI New York
> SFI Europe
> SFI New Zealand
>
> "Hope is not a feeling. It is not the belief that things will turn
    out well,
> but the conviction that what we are doing makes sense, no matter
    how things
> turn out." -- Vaclav Havel, former President of the Czech
    Republic




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Received on Sat Oct 04 2003 - 12:21:10 EDT

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