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Re: [compost_tea] air bubble size



Thanks for the reply Bob.
 
I don't enjoy develpoing a brewer.  I'm a small market farmer and started making this brewer for myself when the only small brewers on the market were the soil soup and the GSI, before the KIS, your brewer and others were available.  I figure since I've got money invested in some equipment (tank, air pumps, hoses and diffusers) I should try to make it work.
 
Your brewer has been described as having larger bubbles.  Do you have any idea how the bubbles coming out of 1/4" hose would compare to your bubble size?
 
Would it be possible to use my tank and air pumps with your air diffusion set-up?
 
thanks,
daniel
----- Original Message -----
Sent: Friday, January 24, 2003 10:11 AM
Subject: Re: [compost_tea] air bubble size

A few days ago my message was that some enjoy developing a bewer, some like to work at  gardening.  Developing and testing a brewer is a several years challenge. 

2 CFM for 20 gallons?  The Bob-o-lator uses less than 1 cfm for 250 gallons and maintains very safe  D O2 .  

 RiverValley <madhava@fidalgo.net> wrote:

This is intersting info.  I'm working on a brewer that I started making last year.  The container is 12" round by 4' high (it holds about 20 gallons) and uses 5 tetra tech deep water pumps which gives me a total of 2 cfms without any diffusers attached.  The air hoses are 1/4 inch diameter.  I think it would simplify my design to not have to use air diffusers and just let the air come out of the hoses.
 
Anyone ideas if this would provide enough air without diffusers. 
 
thanks,
daniel
 
----- Original Message -----
Sent: Thursday, January 23, 2003 7:57 PM
Subject: [compost_tea] air bubble size

<Please be aware that fine air bubbles chew up the organisms in the tea> 
 
Wow, that seems to be "new" info--I seem to remember lots of discussion of size of bubble vs. surface area, but this statement  explains the larger bubble size in the Kis Machine and the Bob-0-Lator
 
Will you elaborate a bit when you get a chance. What is too small? I know the bubbles from an aquarium stone make tested adequate tea. What about diffuser bubbles? Too small?  Or is the real answer: get a O meter and make sure you are 6 mg O2 per L or better?
 
thanks,
jeff
 
 



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