Re: [compost_tea] Pumps and Aerob-a-jet

From: Anthony <boofq_at_wn.com.au>
Date: Tue, 13 May 2003 09:03:45 +0800

MessagePeter
I have been using a spa pump to power a 1100L brewer. Its output is 3000L p=
er minute. Been using it for 3 months now with continuous use upto and beyo=
nd 24hrs and it is still going strong. Provide excellent aeration. Cost me =
$300.00 (AUS). Made by those marvelous kiwis - company called Pool-Quip: 39=
0c Church Street, Penrose PO Box 12 840 , Auckland NZ.
Tel: 64-9-525-4214
  ----- Original Message -----
  From: J Peter Young
  To: compost_tea_at_yahoogroups.com
  Sent: Tuesday, May 13, 2003 4:04 AM
  Subject: RE: [compost_tea] Pumps and Aerob-a-jet


  So basically it sounds like nobody knows anything concrete about this iss=
ue. I'll keep with my soaker hose and stanard air pumps. So back to a previ=
ous questions. Anyone no a good supplier for pumps that put out 9+ CFM. One=
 person here recommended Gast, but they are over $1,000. Hoping to find som=
ething cheaper. Are conventional compress capable of the kind of duty cycle=
s (on for 10 hours straight) that compost tea requires?

  Peter
    -----Original Message-----
    From: Jason Austin [mailto:jason.austin_at_shaw.ca]
    Sent: Monday, May 12, 2003 12:16 PM
    To: compost_tea_at_yahoogroups.com
    Subject: Re: [compost_tea] Pumps and Aerob-a-jet


    Thomas Giannou wrote:

      Hi Peter,

      I don't remember seeing anything from Elaine on this topic. But who =
knows, she sometimes replies but doesn't copy text from the message.
    Sometimes ? <grin>

    Here is Elaines's message from May 6th under the heading of Simple CT m=
aker

      Compost tea brewers are a bit different from fish tanks. Fish don't =
get growing quite as fast as bacteria. When you feed bacteria well, they c=
an use up all the oxygen in any amount of water within minutes, and therefo=
re the aeration rate needs to be high enough to offset bacterial and fungal=
 growth.

      The fine bubbles are not the preferable condition. The fine bubbles =
are really hard on the fungi and seem to break them up and shatter them. =
 

      If you suspend fine bubbles in the water, by over-aerating, you end u=
p with problems. Too much air, and not enough water (supersaturation?), an=
d the organisms will be killed because the environment become too oxidizing=
.

      Cute, huh? Not too much, not too little..... Goldilocks strikes agai=
n.

      We need some additional testing on the fine bubble versus coarse bubb=
le situation. The fine bubble work we've done suggests that fine bubbles a=
re quite detrimental. The bigger bubbles seem to do a better job of extrac=
ting hte organisms from the tea, and keeping things as aerated as possible.=
  

      Always something more to know. So, what is the optimal aeration rate=
? Depends on how much food you add, the compost you use, the temperature o=
f the water.

      Check the www.magicsoil.com web site. Some interesting insights ther=
e about aeration.

      Elaine Ingham
      President, Soil Foodweb Inc.
      www.soilfoodweb.com
    Jason


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Received on Mon May 12 2003 - 21:50:39 EDT

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