Re: [compost_tea] Vortex Brewer.

From: Bobby Grimes <biodynamichawaii_at_gmail.com>
Date: Tue, 24 May 2011 07:25:42 -1000

Bobby here. Imagine you cut your upfeed tube in half, while the tank and tu=
bes are full of water. The water will flow out very aggressively until it e=
qualizes. Stones at the bottom slow the surface exchange. There can be no s=
tagnant water in this tank. Please watch my brewer, 350 gallons, 10 min run=
 time.
http://www.youtube.com/watch?v=fjXFh_ICxic&feature=youtube_gdata_player

Mahalo Bobby G

Sent from my iPhone

On May 24, 2011, at 6:41 AM, "Stephen Steyn" <ssteyn_at_wcaccess.co.za> wrote:

> Wrong again. Bobby is right on the money. Don’t go to deep with t=
he air source as all your doing is heating up your pump and reducing the am=
ount of air it can put out due to backpressure. Convection will oxygenate a=
ll the fluid. No real point in going down more than a metre, just let the v=
ortex 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=
 Behalf 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=
 the 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 goe=
sfrom 90 deg to your 45 or 60 deg angle. At the bottom the water flows of i=
t own accord and then you just pick up where that slows down and stones/air=
 lift 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 undersize=
d the air supply and while I would appreciate advise on which pump I should=
 purchase (I used an Eco7 that allegedly provides7 cfm, it appears that I n=
eed to at least double that rate), my question is more about the properties=
 of 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=
 gravity filling the spray rig). The manifold is attached to the base of th=
e stand and there are three 2 inch pipes that return water over the top of =
the 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=
 because the air bubbles would be in contact with the water for a longer pe=
riod of time as they rose up the pipe thus increasing DO. But of course the=
 deeper the air stone the lower the performance of the air pump because the=
 resistance pressure is greater. In other words, is there any rule of thumb=
 regarding the depth of the air stone?
>
> This question becomes very important as I look at purchasing a new pump a=
s regenerative blowers loose performance very quickly the more pressure the=
y are working under.
>
> I would really appreciate any help or ideas, thanks in advance.
>
>
>


Received on Tue May 24 2011 - 18:48:23 EDT

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