Re: [compost_tea] Re: Micro bubbles + water pump...

From: Thomas Giannou <thomas_at_tandjenterprises.com>
Date: Fri, 2 May 2003 09:24:58 -0700

Hi Dan,

Yes. You are missing something. The smallest unit can put micro bubbles (=
they are about 20 microns in diameter) into suspension in the water. Don't=
 think of the Aerob-A-Jet as a device to circulate the water. It saturates=
 the water with micro-bubbles. These kind of bubbles are in suspension for=
 a long period of time. For example. if you were to saturate a gallon of w=
ater with 20 micron sized micro-bubbles, went to bed and got up in the morn=
ing, they would be there the next morning. The Aerob-A-Jet was designed to=
 keep DO in large bodies of water at very high levels. I have also seen ve=
nturie's that can produce 20 micron micro bubbles.

If you think of the best ceramic air stone that makes small bubbles, they a=
re about 100 microns in size and will come out of the water fairly quickly.=
  With the micro bubbles at 20 microns, they have different physical proper=
ties with respect to water tension and one can maintain a lot of air in sus=
pension for the aerobic bacteria and anything else that loves the presence =
of continuous levels of fairly high DO.

The price of the smallest Aerob-A-Jet puts it off the list for many CTers, =
but if one had a business of making and applying large volumes of compost t=
ea... such as a landscaper with hundreds of accounts or a large farming ope=
ration, then the Aerob-A-Jet would be very desirable because with such a de=
vice protruding into a compost tea tank, DO would never be a problem. This=
 device would also solve the problem of when you stop brewing the tea and a=
re now ready to apply the tea and are concerned about the DO levels droppin=
g and affecting the bacteria because the DO was too low. I think that prob=
lem would be history as far as the DO component of that particular problem =
is concerned.

I have seen tests with 20 micron bubbles in sea water and there is so much =
air in suspension, the water looks like milk! You can't see through the se=
a water. (pun intended!) With so many things suspended and dissolved in c=
ompost tea, I would expect much the same thing. With the Aerob-A-Jet const=
antly running, air is being pushed out into the water at a high rate, but w=
ater is not being circulated through the device. I don't think it would ta=
ke very long for the smallest Aerob-A-Jet to saturate and maintain a lot of=
 suspended air bubbles in a fairly large tank of tea water. If a lot of wa=
ter had to be circulated through the device, then it wouldn't be long befor=
e the process would efficiently clear out all of the bacteria and fungi in =
the process of making those 20 micron micro bubbles.

If you want to get hold of a distributor for the Aerob-A-Jet, call the manu=
facturer and they will get you in contact with a distributor in your area. =
 I was talking with a distributor in Los Angeles, but don't have the contac=
t information. I didn't keep it because I figured I'd never get such a dev=
ice that would cost that much. But, with people buying $1,200 brewers, I g=
uess the Aerob-A-Jet might have a place after all eh?

--Thomas Giannou
http://www.tandjenterprises.com

  ----- Original Message -----
  From: lmvine
  To: compost_tea_at_yahoogroups.com
  Sent: Friday, May 02, 2003 5:06 AM
  Subject: [compost_tea] Re: Micro bubbles + water pump...


> Hi Tachung,
>
> I think it was between $400 and $450 from a distributor in Los
  Angeles.

  The Aerob-A-Jet Model 100 Specifications says 0.22 CFM air. This is
  lower than that required by 15 gallon CT brewers. I can see were it
  would provide SOME aeration for a septic tank where it is already
  anerobic.

  T. G. am I missing something?
  Dan



Received on Fri May 02 2003 - 13:37:47 EDT

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