RE: [compost_tea] Vortex Brewer.

From: Stephen Steyn <ssteyn_at_wcaccess.co.za>
Date: Tue, 24 May 2011 18:41:24 +0200

Wrong again. Bobby is right on the money. Don’t go to deep with the=
 air source as all your doing is heating up your pump and reducing the amou=
nt of air it can put out due to backpressure. Convection will oxygenate all=
 the fluid. No real point in going down more than a metre, just let the vor=
tex tubes draw from near the bottom.

Also be sure to keep your pump above the liquid level so that it doesnâ=
€™t fill with water when you switch off.

SS

 

From: compost_tea_at_yahoogroups.com [mailto:compost_tea_at_yahoogroups.com] On B=
ehalf Of soilfoodweb_at_aol.com
Sent: 24 May 2011 16:40
To: compost_tea_at_yahoogroups.com
Subject: Re: [compost_tea] Vortex Brewer.

 

  

Putting the air at the bottom of the tank is critical to get the water at t=
he bottom of the tank to mix and not be stagnant.

Sent via DROID on Verizon Wireless



-----Original message-----

From: Bobby Grimes <biodynamichawaii_at_gmail.com>
To: "compost_tea_at_yahoogroups.com" <compost_tea_at_yahoogroups.com>
Sent: Tue, May 24, 2011 02:47:03 GMT+00:00
Subject: Re: [compost_tea] Vortex Brewer.

  

Will, I would put the stones in the upfeed tubes right where the tank goesf=
rom 90 deg to your 45 or 60 deg angle. At the bottom the water flows of it =
own accord and then you just pick up where that slows down and stones/air l=
ift it from there.

I would use the Sweetwater SL170 or the next smaller linear air pump.

Bobby

 



Sent from my iPhone


On May 23, 2011, at 12:20 PM, "Will Buck" <willbuck76_at_yahoo.com> wrote:

  

Hi, I am in the process of building a 240 gallon Vortex brewer.

My first brew went anaerobic almost immediately. Clearly I have undersized =
the air supply and while I would appreciate advise on which pump I should p=
urchase (I used an Eco7 that allegedly provides7 cfm, it appears that I nee=
d to at least double that rate), my question is more about the properties o=
f an air lift pumps so I can maximize the amount of DO.

My design is similar to Bobby Grimes. I purchased a cone bottom tank that I=
 mounted on a stand so the tank is about 4 feet off the ground (ideal for g=
ravity filling the spray rig). The manifold is attached to the base of the =
stand and there are three 2 inch pipes that return water over the top of th=
e tank via air lift from a 17 inch air stones.

My question is at what depth should I put the air stones in the pipes? If I=
 put the stones near the bottom of the pipe I thought this would be ideal b=
ecause the air bubbles would be in contact with the water for a longer peri=
od of time as they rose up the pipe thus increasing DO. But of course the d=
eeper the air stone the lower the performance of the air pump because the r=
esistance pressure is greater. In other words, is there any rule of thumb r=
egarding the depth of the air stone?

This question becomes very important as I look at purchasing a new pump as =
regenerative blowers loose performance very quickly the more pressure they =
are working under.

I would really appreciate any help or ideas, thanks in advance.





Received on Tue May 24 2011 - 18:48:22 EDT

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